A54SX72A-1FGG256 - Microsemi

February 2005 i

SX-A Family FPGAs

Leading-Edge Performance

• 250 MHz System Performance

• 350 MHz Internal Performance

Specifications

• 12,000 to 108,000 Available System Gates

• Up to 360 User-Programmable I/O Pins

• Up to 2,012 Dedicated Flip-Flops

• 0.22 µ / 0.25 µ CMOS Process Technology

Features

• Hot-Swap Compliant I/Os

• Power-Up/Down Friendly (No Sequencing Required

for Supply Voltages)

• 66 MHz PCI Compliant

• Nonvolatile, Single-Chip Solution

• Configurable I/O Support for 3.3 V / 5 V PCI, 5 V

TTL, 3.3 V LVTTL, 2.5 V LVCMOS2

• 2.5 V, 3.3 V, and 5 V Mixed-Voltage Operation with

5 V Input Tolerance and 5 V Drive Strength

• Devices Support Multiple Temperature Grades

• Configurable Weak-Resistor Pull-Up or Pull-Down

for I/O at Power-Up

• Individual Output Slew Rate Control

• Up to 100% Resource Utilization and 100% Pin

Locking

• Deterministic, User-Controllable Timing

• Unique In-System Diagnostic and Verification

Capability with Silicon Explorer II

• Boundary-Scan Testing in Compliance with IEEE

Standard 1149.1 (JTAG)

• Actel Secure Programming Technology with

FuseLock™ Prevents Reverse Engineering and

Design Theft

™

Table 1 • SX-A Product Profile

Device A54SX08A A54SX16A A54SX32A A54SX72A

Capacity

Typ ic al Ga te s

System Gates

8,000

12,000

16,000

24,000

32,000

48,000

72,000

108,000

Logic Modules

Combinatorial Cells

Dedicated Flip-Flops

Maximum Flip-Flops

768

512

256

512*

1,452

924

528

990

2,880

1,800

1,080

1,980

6,036

4,024

2,012

4,024

Maximum User I/Os 130 180 249 360

Global Clocks 3 3 3 3

Quadrant Clocks 0 0 0 4

Boundary Scan Testing Yes Yes Yes Yes

3.3 V / 5 V PCI Yes Yes Yes Yes

Input Set-Up (External) 0 ns 0 ns 0 ns 0 ns

Speed Grades –F, Std, –1, –2 –F, Std, –1, –2, –3 –F, Std, –1, –2, –3 –F, Std, –1, –2, –3

Temperature Grades C, I, A, M C, I, A, M C, I, A, M C, I, A, M

Package (by pin count)

PQFP

TQFP

PBGA

FBGA

CQFP

208

100, 144

–

144

–

208

100, 144

–

144, 256

–

208

100, 144, 176

329

144, 256, 484

208, 256

208

–

256, 484

208, 256

Note: *A maximum of 512 registers is possible if all 512 C cells are used to build an additional 256 registers

v5.1

SX-A Family FPGAs

ii v5.1

Ordering Information

Device Resources

Note: *For more information about the CQFP package options, refer to the HiRel SX-A datasheet.

Package Lead Count

A54SX16A PQ 2082

Part Number

A54SX08A = 12,000 System Gates

A54SX16A = 24,000 System Gates

A54SX32A = 48,000 System Gates

A54SX72A = 108,000 S

stem Gates

Speed Grade

Blank = Standard Speed

–1 = Approximately 15% Faster than Standard

–2 = Approximately 25% Faster than Standard

–3 = Approximately 35% Faster than Standard

–F = Approximately 40% Slower than Standard

Package Type

BG = 1.27 mm Plastic Ball Grid Array

FG = 1.0 mm Fine Pitch Ball Grid Array

PQ = Plastic Quad Flat Pack

TQ = Thin (1.4 mm) Quad Flat Pack

CQ = Ceramic Quad Flat Pack*

Application (Temperature Range)

Blank = Commercial (0 to +70˚)

I = Industrial (-40 to +85˚C)

A = Automotive (-40 to +125˚C)

M = Military (-55 to +125˚C)

B = MIL-STD-883 Class B

User I/Os (Including Clock Buffers)

Device

208-Pin

PQFP

100-Pin

TQFP

144-Pin

TQFP

176-Pin

TQFP

329-Pin

PBGA

144-Pin

FBGA

256-Pin

FBGA

484-Pin

FBGA

A54SX08A 130 81 113 – – 111 – –

A54SX16A 175 81 113 – – 111 180 –

A54SX32A 174 81 113 147 249 111 203 249

A54SX72A 171 – – – – – 203 360

Notes: Package Definitions: PQFP = Plastic Quad Flat Pack, TQFP = Thin Quad Flat Pack, PBGA = Plastic Ball Grid Array,

FBGA = Fine Pitch Ball Grid Array

SX-A Family FPGAs

v5.1 iii

Temperature Grade Offering

Speed Grade and Temperature Grade Matrix

Contact your Actel Sales representative for more information on availability.

Package A54SX08A A54SX16A A54SX32A A54SX72A

PQ208 C,I,A,M C,I,A,M C,I,A,M C,I,A,M

TQ100 C,I,A,M C,I,A,M C,I,A,M

TQ144 C,I,A,M C,I,A,M C,I,A,M

TQ176 C,I,M

BG329 C,I,M

FG144 C,I,A,M C,I,A,M C,I,A,M

FG256 C,I,A,M C,I,A,M C,I,A,M

FG484 C,I,M C,I,A,M

CQ208 C,M,B C,M,B

CQ256 C,M,B C,M,B

Notes:

1. C = Commercial

2. I = Industrial

3. A = Automotive

4. M = Military

5. B = Mil-Std-883 Class B

6. For more information regarding automotive products, refer to the SX-A Automotive Family FPGAs datasheet.

7. For more information regarding Mil-Temp and ceramic packages, refer to the HiRel SX-A Family FPGAs datasheet.

F Std –1 –2 –3

Commercial ✓✓✓✓✓

Industrial ✓✓✓✓

Automotive ✓

Military ✓✓

Mil-Std. 883B ✓✓

Notes:

1. For more information regarding automotive products, refer to the SX-A Automotive Family FPGAs datasheet.

2. For more information regarding Mil-Temp and ceramic packages, refer to the HiRel SX-A Family FPGAs datasheet.

iv v5.1

Table of Contents

SX-A Family FPGAs

General Description

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

SX-A Family Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Other Architectural Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Detailed Specifications

Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Typical SX-A Standby Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

PCI Compliance for the SX-A Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

SX-A Timing Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Sample Path Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Output Buffer Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

AC Test Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Input Buffer Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

C-Cell Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Cell Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Temperature and Voltage Derating Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Package Pin Assignments

208-Pin PQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

100-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

144-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

176-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

329-Pin PBGA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

144-Pin FBGA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

256-Pin FBGA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

484-Pin FBGA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

v5.1 v

Table of Contents

SX-A Family FPGAs

Datasheet Information

List of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Datasheet Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

International Traffic in Arms Regulations (ITAR) and Export Administration

Regulations (EAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

SX-A Family FPGAs

v5.1 1-1

General Description

Introduction

The Actel SX-A family of FPGAs offers a cost-effective,

single-chip solution for low-power, high-performance

designs. Fabricated on 0.22 µm / 0.25 µm CMOS

antifuse technology and with the support of 2.5 V,

3.3 V and 5 V I/Os, the SX-A is a versatile platform to

integrate designs while significantly reducing time-

to-market.

SX-A Family Architecture

The SX-A family’s device architecture provides a unique

approach to module organization and chip routing that

satisfies performance requirements and delivers the most

optimal register/logic mix for a wide variety of

applications.

Interconnection between these logic modules is achieved

using Actel’s patented metal-to-metal programmable

antifuse interconnect elements (Figure 1-1). The

antifuses are normally open circuit and, when

programmed, form a permanent low-impedance

connection.

Note: The A54SX72A device has four layers of metal with the antifuse between Metal 3 and Metal 4. The A54SX08A, A54SX16A, and

A54SX32A devices have three layers of metal with the antifuse between Metal 2 and Metal 3.

Figure 1-1 • SX-A Family Interconnect Elements

Silicon Substrate

Metal 4

Metal 3

Metal 2

Metal 1

Amorphous Silicon/

Dielectric Antifuse

Tungsten Plug Via

Tungsten Plug Contact

Routing Tracks

SX-A Family FPGAs

1-2 v5.1

Logic Module Design

The SX-A family architecture is described as a “sea-of-

modules” architecture because the entire floor of the

device is covered with a grid of logic modules with

virtually no chip area lost to interconnect elements or

routing. The Actel SX-A family provides two types of

logic modules: the register cell (R-cell) and the

combinatorial cell (C-cell).

The R-cell contains a flip-flop featuring asynchronous clear,

asynchronous preset, and clock enable, using the S0 and S1

lines control signals (Figure 1-2). The R-cell registers feature

programmable clock polarity selectable on a register-by-

allowing mapping of synthesized functions into the SX-A

FPGA. The clock source for the R-cell can be chosen from

either the hardwired clock, the routed clocks, or internal

logic.

The C-cell implements a range of combinatorial functions

of up to five inputs (Figure 1-3). Inclusion of the DB input

and its associated inverter function allows up to 4,000

different combinatorial functions to be implemented in a

single module. An example of the flexibility enabled by

the inversion capability is the ability to integrate a 3-input

exclusive-OR function into a single C-cell. This facilitates

construction of 9-bit parity-tree functions with 1.9 ns

propagation delays.

Module Organization

All C-cell and R-cell logic modules are arranged into

horizontal banks called Clusters. There are two types of

Clusters: Type 1 contains two C-cells and one R-cell, while

Type 2 contains one C-cell and two R-cells.

Clusters are grouped together into SuperClusters

(Figure 1-4 on page 1-3). SuperCluster 1 is a two-wide

grouping of Type 1 Clusters. SuperCluster 2 is a two-wide

group containing one Type 1 Cluster and one Type 2

Cluster. SX-A devices feature more SuperCluster 1

modules than SuperCluster 2 modules because designers

typically require significantly more combinatorial logic

than flip-flops.

Figure 1-2 • R-Cell

Figure 1-3 • C-Cell

DirectConnect

Input

CLKA,

CLKB,

Internal Logic

HCLK

CKS CKP

CLR

PRE

Routed

Data Input

S0 S1

A0 B0 A1 B1

Sa Sb

SX-A Family FPGAs

v5.1 1-3

Routing Resources

The routing and interconnect resources of SX-A devices

are in the top two metal layers above the logic modules

(Figure 1-1 on page 1-1), providing optimal use of silicon,

thus enabling the entire floor of the device to be

spanned with an uninterrupted grid of logic modules.

Interconnection between these logic modules is achieved

using the Actel patented metal-to-metal programmable

antifuse interconnect elements. The antifuses are

normally open circuits and, when programmed, form a

permanent low-impedance connection.

Clusters and SuperClusters can be connected through the

use of two innovative local routing resources called

FastConnect and DirectConnect, which enable extremely

fast and predictable interconnection of modules within

Clusters and SuperClusters (Figure 1-5 on page 1-4 and

Figure 1-6 on page 1-4). This routing architecture also

dramatically reduces the number of antifuses required to

complete a circuit, ensuring the highest possible

performance, which is often required in applications such

as fast counters, state machines, and data path logic. The

interconnect elements (i.e., the antifuses and metal

tracks) have lower capacitance and lower resistance than

any other device of similar capacity, leading to the fastest

signal propagation in the industry.

DirectConnect is a horizontal routing resource that

provides connections from a C-cell to its neighboring

R-Cell in a given SuperCluster. DirectConnect uses a

hardwired signal path requiring no programmable

interconnection to achieve its fast signal propagation

time of less than 0.1 ns.

FastConnect enables horizontal routing between any

two logic modules within a given SuperCluster, and

vertical routing with the SuperCluster immediately

below it. Only one programmable connection is used in a

FastConnect path, delivering a maximum pin-to-pin

propagation time of 0.3 ns.

In addition to DirectConnect and FastConnect, the

architecture makes use of two globally oriented routing

resources known as segmented routing and high-drive

routing. The Actel segmented routing structure provides

a variety of track lengths for extremely fast routing

between SuperClusters. The exact combination of track

lengths and antifuses within each path is chosen by the

100% automatic place-and-route software to minimize

signal propagation delays.

The general system of routing tracks allows any logic

module in the array to be connected to any other logic

or I/O module. Within this system, most connections

typically require three or fewer antifuses, resulting in

fast and predictable performance.

The unique local and general routing structure featured

in SX-A devices allows 100% pin-locking with full logic

utilization, enables concurrent printed circuit board

(PCB) development, reduces design time, and allows

designers to achieve performance goals with minimum

effort.

Figure 1-4 • Cluster Organization

Type 1 SuperCluster Type 2 SuperCluster

Cluster 1 Cluster 1 Cluster 2 Cluster 1

R-Cell C-Cell

A0 B0 A1 B1

Sa Sb

DirectConnect

Input

CLKA,

CLKB,

Internal Logic

HCLK

CKS CKP

CLR

PRE

YDQ

Routed

Data Input

S0 S1

SX-A Family FPGAs

1-4 v5.1

Figure 1-5 • DirectConnect and FastConnect for Type 1 SuperClusters

Figure 1-6 • DirectConnect and FastConnect for Type 2 SuperClusters

DirectConnect

• No Antifuses

• 0.1 ns Maximum Routing Delay

FastConnect

• One Antifuse

• 0.3 ns Maximum Routing Delay

Routing Segments

• Typically Two Antifuses

• Max. Five Antifuses

Routing Segments

• Typically 2 antifuses

• Max. 5 antifuses

FastConnect

• One antifuse

DirectConnect

• No antifuses for

smallest routing delay

SX-A Family FPGAs

v5.1 1-5

Clock Resources

Actel’s high-drive routing structure provides three clock

networks (Table 1-1). The first clock, called HCLK, is

hardwired from the HCLK buffer to the clock select

multiplexor (MUX) in each R-cell. HCLK cannot be

connected to combinatorial logic. This provides a fast

propagation path for the clock signal. If not used, this

pin must be set as Low or High on the board. It must not

be left floating. Figure 1-7 describes the clock circuit

used for the constant load HCLK and the macros

supported.

HCLK does not function until the fourth clock cycle each

time the device is powered up to prevent false output

levels due to any possible slow power-on-reset signal and

fast start-up clock circuit. To activate HCLK from the first

cycle, the TRST pin must be reserved in the Design

software and the pin must be tied to GND on the board.

Two additional clocks (CLKA, CLKB) are global clocks that

can be sourced from external pins or from internal logic

signals within the SX-A device. CLKA and CLKB may be

connected to sequential cells or to combinational logic. If

CLKA or CLKB pins are not used or sourced from signals,

these pins must be set as Low or High on the board. They

must not be left floating. Figure 1-8 describes the CLKA

and CLKB circuit used and the macros supported in SX-A

devices with the exception of A54SX72A.

In addition, the A54SX72A device provides four

quadrant clocks (QCLKA, QCLKB, QCLKC, and QCLKD—

corresponding to bottom-left, bottom-right, top-left,

and top-right locations on the die, respectively), which

can be sourced from external pins or from internal logic

signals within the device. Each of these clocks can

individually drive up to an entire quadrant of the chip,

or they can be grouped together to drive multiple

quadrants (Figure 1-9 on page 1-6). QCLK pins can

function as user I/O pins. If not used, the QCLK pins

must be tied Low or High on the board and must not be

left floating.

For more information on how to use quadrant clocks in

the A54SX72A device, refer to the Global Clock Networks

in Actel’s Antifuse Devices and Using A54SX72A and

RT54SX72S Quadrant Clocks application notes.

The CLKA, CLKB, and QCLK circuits for A54SX72A as well

as the macros supported are shown in Figure 1-10 on

page 1-6. Note that bidirectional clock buffers are only

available in A54SX72A. For more information, refer to

the "Pin Description" section on page 1-14.

Table 1-1 • SX-A Clock Resources

A54SX08A A54SX16A A54SX32A A54SX72A

Routed Clocks (CLKA, CLKB) 2 2 2 2

Hardwired Clocks (HCLK) 1 1 1 1

Quadrant Clocks (QCLKA, QCLKB, QCLKC, QCLKD) 0 0 0 4

Figure 1-7 • SX-A HCLK Clock Buffer

Figure 1-8 • SX-A Routed Clock Buffer

Constant Load

Clock Network

HCLKBUF

Clock Network

From Internal Logic

CLKBUF

CLKBUFI

CLKINT

CLKINTI

SX-A Family FPGAs

1-6 v5.1

Figure 1-9 • SX-A QCLK Architecture

Figure 1-10 • A54SX72A Routed Clock and QCLK Buffer

4 QCLKBUFS

5:1 5:1

Quadrant 2

Quadrant 0

Quadrant 3

Quadrant 1

QCLKINT (to arra

)

QCLKINT (to array)

QCLKINT (to arra

)

QCLKINT (to array)

Clock Network

From Internal Logic

QCLKBUF

QCLKBUFI

QCLKINT

QCLKINTI

QCLKBIBUF

QCLKBIBUFI

CLKBUF

CLKBUFI

CLKINT

CLKINTI

CLKBIBUF

CLKBIBUFI

SX-A Family FPGAs

v5.1 1-7

Other Architectural Features

Technology

The Actel SX-A family is implemented on a high-voltage,

twin-well CMOS process using 0.22 µ/0.25µ design

rules. The metal-to-metal antifuse is comprised of a

combination of amorphous silicon and dielectric material

with barrier metals and has a programmed ('on' state)

resistance of 25 Ω with capacitance of 1.0 fF for low

signal impedance.

Performance

The unique architectural features of the SX-A family

enable the devices to operate with internal clock

frequencies of 350 MHz, causing very fast execution of

even complex logic functions. The SX-A family is an

optimal platform upon which to integrate the

functionality previously contained in multiple complex

programmable logic devices (CPLDs). In addition, designs

that previously would have required a gate array to meet

performance goals can be integrated into an SX-A device

with dramatic improvements in cost and time-to-market.

Using timing-driven place-and-route tools, designers can

achieve highly deterministic device performance.

User Security

Reverse engineering is virtually impossible in SX-A

devices because it is extremely difficult to distinguish

between programmed and unprogrammed antifuses. In

addition, since SX-A is a nonvolatile, single-chip solution,

there is no configuration bitstream to intercept at device

power-up.

The Actel FuseLock advantage ensures that unauthorized

users will not be able to read back the contents of an

Actel antifuse FPGA. In addition to the inherent

strengths of the architecture, special security fuses that

prevent internal probing and overwriting are hidden

throughout the fabric of the device. They are located

where they cannot be accessed or bypassed without

destroying access to the rest of the device, making both

invasive and more-subtle noninvasive attacks ineffective

against Actel antifuse FPGAs.

Look for this symbol to ensure your valuable IP is secure

(Figure 1-11).

For more information, refer to Actel’s Implementation of

Security in Actel Antifuse FPGAs application note.

I/O Modules

For a simplified I/O schematic, refer to Figure 1 in the

application note, Actel eX, SX-A, and RTSX-S I/Os.

Each user I/O on an SX-A device can be configured as an

input, an output, a tristate output, or a bidirectional pin.

Mixed I/O standards can be set for individual pins,

though this is only allowed with the same voltage as the

input. These I/Os, combined with array registers, can

achieve clock-to-output-pad timing as fast as 3.8 ns, even

without the dedicated I/O registers. In most FPGAs, I/O

cells that have embedded latches and flip-flops,

requiring instantiation in HDL code; this is a design

complication not encountered in SX-A FPGAs. Fast pin-

to-pin timing ensures that the device is able to interface

with any other device in the system, which in turn

enables parallel design of system components and

reduces overall design time. All unused I/Os are

configured as tristate outputs by the Actel Designer

software, for maximum flexibility when designing new

boards or migrating existing designs.

SX-A I/Os should be driven by high-speed push-pull

devices with a low-resistance pull-up device when being

configured as tristate output buffers. If the I/O is driven

by a voltage level greater than VCCI and a fast push-pull

device is NOT used, the high-resistance pull-up of the

driver and the internal circuitry of the SX-A I/O may

create a voltage divider. This voltage divider could pull

the input voltage below specification for some devices

connected to the driver. A logic '1' may not be correctly

presented in this case. For example, if an open drain

driver is used with a pull-up resistor to 5 V to provide the

logic '1' input, and VCCI is set to 3.3 V on the SX-A device,

the input signal may be pulled down by the SX-A input.

Each I/O module has an available power-up resistor of

approximately 50 kΩ that can configure the I/O in a

known state during power-up. For nominal pull-up and

pull-down resistor values, refer to Table 1-4 on page 1-8

of the application note Actel eX, SX-A, and RTSX-S I/Os.

Just slightly before VCCA reaches 2.5 V, the resistors are

disabled, so the I/Os will be controlled by user logic. See

Table 1-2 on page 1-8 and Table 1-3 on page 1-8 for

more information concerning available I/O features.

Figure 1-11 • FuseLock

SX-A Family FPGAs

1-8 v5.1

Power-Up/Down and Hot Swapping

SX-A I/Os are configured to be hot-swappable, with the

exception of 3.3 V PCI. During power-up/down (or partial

up/down), all I/Os are tristated. VCCA and VCCI do not

have to be stable during power-up/down, and can be

powered up/down in any order. When the SX-A device is

plugged into an electrically active system, the device will

not degrade the reliability of or cause damage to the

host system. The device’s output pins are driven to a high

impedance state until normal chip operating conditions

are reached. Table 1-4 summarizes the VCCA voltage at

which the I/Os behave according to the user’s design for

an SX-A device at room temperature for various ramp-up

rates. The data reported assumes a linear ramp-up

profile to 2.5 V. For more information on power-up and

hot-swapping, refer to the application note, Actel SX-A

and RT54SX-S Devices in Hot-Swap and Cold-Sparing

Applications.

Table 1-2 • I/O Features

Function Description

Input Buffer Threshold Selections • 5 V: PCI, TTL

• 3.3 V: PCI, LVTTL

• 2.5 V: LVCMOS2 (commercial only)

Flexible Output Driver • 5 V: PCI, TTL

• 3.3 V: PCI, LVTTL

• 2.5 V: LVCMOS2 (commercial only)

Output Buffer “Hot-Swap” Capability (3.3 V PCI is not hot swappable)

• I/O on an unpowered device does not sink current

• Can be used for “cold-sparing”

Selectable on an individual I/O basis

Individually selectable slew rate; high slew or low slew (The default is high slew rate).

The slew is only affected on the falling edge of an output. Rising edges of outputs are

not affected.

Power-Up Individually selectable pull-ups and pull-downs during power-up (default is to power-up

in tristate)

Enables deterministic power-up of device

VCCA and VCCI can be powered in any order

Table 1-3 • I/O Characteristics for All I/O Configurations

Hot Swappable Slew Rate Control Power-Up Resistor

TTL, LVTTL, LVCMOS2 Yes Yes. Only affects falling edges of outputs Pull-up or pull-down

3.3 V PCI No No. High slew rate only Pull-up or pull-down

5 V PCI Yes No. High slew rate only Pull-up or pull-down

Table 1-4 • Power-Up Time at which I/Os Become Active

Supply Ramp Rate 0.25 V/µs 0.025 V/µs 5 V/ms 2.5 V/ms 0.5 V/ms 0.25 V/ms 0.1 V/ms 0.025 V/ms

Units µsµsmsmsmsmsms ms

A54SX08A 10 96 0.34 0.65 2.7 5.4 12.9 50.8

A54SX16A 10 100 0.36 0.62 2.5 4.7 11.0 41.6

A54SX32A 10 100 0.46 0.74 2.8 5.2 12.1 47.2

A54SX72A 10 100 0.41 0.67 2.6 5.0 12.1 47.2

SX-A Family FPGAs

v5.1 1-9

Boundary-Scan Testing (BST)

All SX-A devices are IEEE 1149.1 compliant and offer

superior diagnostic and testing capabilities by providing

Boundary Scan Testing (BST) and probing capabilities.

The BST function is controlled through the special JTAG

pins (TMS, TDI, TCK, TDO, and TRST). The functionality of

the JTAG pins is defined by two available modes:

Dedicated and Flexible. TMS cannot be employed as a

user I/O in either mode.

Dedicated Mode

In Dedicated mode, all JTAG pins are reserved for BST;

designers cannot use them as regular I/Os. An internal

pull-up resistor is automatically enabled on both TMS

and TDI pins, and the TMS pin will function as defined in

the IEEE 1149.1 (JTAG) specification.

To select Dedicated mode, the user must reserve the

JTAG pins in Actel’s Designer software. Reserve the JTAG

pins by checking the Reserve JTAG box in the Device

Selection Wizard (Figure 1-12).

The default for the software is Flexible mode; all boxes

are unchecked. Table 1-5 lists the definitions of the

options in the Device Selection Wizard.

Flexible Mode

In Flexible mode, TDI, TCK, and TDO may be employed as

either user I/Os or as JTAG input pins. The internal

resistors on the TMS and TDI pins are not present in

flexible JTAG mode.

To select the Flexible mode, uncheck the Reserve JTAG

box in the Device Selection Wizard dialog in the Actel

Designer software. In Flexible mode, TDI, TCK, and TDO

pins may function as user I/Os or BST pins. The

functionality is controlled by the BST Test Access Port

(TAP) controller. The TAP controller receives two control

inputs, TMS and TCK. Upon power-up, the TAP controller

enters the Test-Logic-Reset state. In this state, TDI, TCK,

and TDO function as user I/Os. The TDI, TCK, and TDO are

transformed from user I/Os into BST pins when a rising

edge on TCK is detected while TMS is at logic low. To

return to Test-Logic Reset state, TMS must be high for at

least five TCK cycles. An external 10 k pull-up resistor

to VCCI should be placed on the TMS pin to pull it

High by default.

Table 1-6 describes the different configuration

requirements of BST pins and their functionality in

different modes.

TRST Pin

The TRST pin functions as a dedicated Boundary-Scan

Reset pin when the Reserve JTAG Test Reset option is

selected as shown in Figure 1-12. An internal pull-up

resistor is permanently enabled on the TRST pin in this

mode. Actel recommends connecting this pin to ground

in normal operation to keep the JTAG state controller in

the Test-Logic-Reset state. When JTAG is being used, it

can be left floating or can be driven high.

When the Reserve JTAG Test Reset option is not

selected, this pin will function as a regular I/O. If unused

as an I/O in the design, it will be configured as a tristated

output.

Figure 1-12 • Device Selection Wizard

Table 1-5 • Reserve Pin Definitions

Pin Function

Reserve JTAG Keeps pins from being used and

changes the behavior of JTAG pins (no

pull-up on TMS)

Reserve JTAG Test

Reset

Regular I/O or JTAG reset with an

internal pull-up

Reserve Probe Keeps pins from being used or regular

I/O

Table 1-6 • Boundary-Scan Pin Configurations and

Functions

Mode

Designer

"Reserve JTAG"

Selection

TAP Controller

State

Dedicated (JTAG) Checked Any

Flexible (User I/O) Unchecked Test-Logic-Reset

Flexible (JTAG) Unchecked Any EXCEPT Test-

Logic-Reset

SX-A Family FPGAs

1-10 v5.1

JTAG Instructions

Table 1-7 lists the supported instructions with the corresponding IR codes for SX-A devices.

Table 1-8 lists the codes returned after executing the IDCODE instruction for SX-A devices. Note that bit 0 is always '1'.

Bits 11-1 are always '02F', which is the Actel manufacturer code.

Table 1-7 • JTAG Instruction Code

Instructions (IR4:IR0) Binary Code

EXTEST 00000

SAMPLE/PRELOAD 00001

INTEST 00010

USERCODE 00011

IDCODE 00100

HighZ 01110

CLAMP 01111

Diagnostic 10000

BYPASS 11111

Reserved All others

Table 1-8 • JTAG Instruction Code

Device Process Revision Bits 31-28 Bits 27-12

A54SX08A 0.22 µ 0 8, 9 40B4, 42B4

1 A, B 40B4, 42B4

A54SX16A 0.22 µ 0 9 40B8, 42B8

1 B 40B8, 42B8

0.25 µ 1 B 22B8

A54SX32A 0.2 2µ 0 9 40BD, 42BD

1 B 40BD, 42BD

0.25 µ 1 B 22BD

A54SX72A 0.22 µ 0 9 40B2, 42B2

1 B 40B2, 42B2

0.25 µ 1 B 22B2

SX-A Family FPGAs

v5.1 1-11

Probing Capabilities

SX-A devices also provide an internal probing capability

that is accessed with the JTAG pins. The Silicon Explorer II

diagnostic hardware is used to control the TDI, TCK, TMS,

and TDO pins to select the desired nets for debugging.

The user assigns the selected internal nets in Actel Silicon

Explorer II software to the PRA/PRB output pins for

observation. Silicon Explorer II automatically places the

device into JTAG mode. However, probing functionality is

only activated when the TRST pin is driven high or left

floating, allowing the internal pull-up resistor to pull

TRST High. If the TRST pin is held Low, the TAP controller

remains in the Test-Logic-Reset state so no probing can

be performed. However, the user must drive the TRST pin

High or allow the internal pull-up resistor to pull TRST

High.

When selecting the Reserve Probe Pin box as shown in

Figure 1-12 on page 1-9, direct the layout tool to reserve

the PRA and PRB pins as dedicated outputs for probing.

This Reserve option is merely a guideline. If the designer

assigns user I/Os to the PRA and PRB pins and selects the

Reserve Probe Pin option, Designer Layout will

override the Reserve Probe Pin option and place the

user I/Os on those pins.

To allow probing capabilities, the security fuse must not

be programmed. Programming the security fuse disables

the JTAG and probe circuitry. Table 1-9 summarizes the

possible device configurations for probing once the

device leaves the Test-Logic-Reset JTAG state.

Table 1-9 • Device Configuration Options for Probe Capability (TRST Pin Reserved)

JTAG Mode TRST1Security Fuse Programmed PRA, PRB2TDI, TCK, TDO2

Dedicated Low No User I/O3JTAG Disabled

High No Probe Circuit Outputs JTAG I/O

Flexible Low No User I/O3User I/O3

High No Probe Circuit Outputs JTAG I/O

Yes Probe Circuit Secured Probe Circuit Secured

Notes:

1. If the TRST pin is not reserved, the device behaves according to TRST = High as described in the table.

2. Avoid using the TDI, TCK, TDO, PRA, and PRB pins as input or bidirectional ports. Since these pins are active during probing, input

signals will not pass through these pins and may cause contention.

3. If no user signal is assigned to these pins, they will behave as unused I/Os in this mode. Unused pins are automatically tristated by

the Designer software.

SX-A Family FPGAs

1-12 v5.1

SX-A Probe Circuit Control Pins

SX-A devices contain internal probing circuitry that

provides built-in access to every node in a design,

enabling 100% real-time observation and analysis of a

device's internal logic nodes without design iteration.

The probe circuitry is accessed by Silicon Explorer II, an

easy to use, integrated verification and logic analysis tool

that can sample data at 100 MHz (asynchronous) or

66 MHz (synchronous). Silicon Explorer II attaches to a

PC’s standard COM port, turning the PC into a fully

functional 18-channel logic analyzer. Silicon Explorer II

allows designers to complete the design verification

process at their desks and reduces verification time from

several hours per cycle to a few seconds.

The Silicon Explorer II tool uses the boundary-scan ports

(TDI, TCK, TMS, and TDO) to select the desired nets for

verification. The selected internal nets are assigned to the

PRA/PRB pins for observation. Figure 1-13 illustrates the

interconnection between Silicon Explorer II and the FPGA

to perform in-circuit verification.

Design Considerations

In order to preserve device probing capabilities, users

should avoid using the TDI, TCK, TDO, PRA, and PRB pins

as input or bidirectional ports. Since these pins are active

during probing, critical input signals through these pins

are not available. In addition, the security fuse must not

be programmed to preserve probing capabilities. Actel

recommends that you use a 70 Ω series termination

resistor on every probe connector (TDI, TCK, TMS, TDO,

PRA, PRB). The 70 Ω series termination is used to prevent

data transmission corruption during probing and

reading back the checksum.

Figure 1-13 • Probe Setup

Additional

Channels

SX-A FPGA

70 Ω

TDI

TCK

TMS

TDO

PRA

PRB

Serial Connection Silicon Explorer II

SX-A Family FPGAs

v5.1 1-13

Design Environment

The SX-A family of FPGAs is fully supported by both Actel

Libero® Integrated Design Environment (IDE) and

Designer FPGA development software. Actel Libero IDE is

a design management environment, seamlessly

integrating design tools while guiding the user through

the design flow, managing all design and log files, and

passing necessary design data among tools. Additionally,

Libero IDE allows users to integrate both schematic and

HDL synthesis into a single flow and verify the entire

design in a single environment. Libero IDE includes

Synplify® for Actel from Synplicity®, ViewDraw® for

Actel from Mentor Graphics®, ModelSim® HDL Simulator

from Mentor Graphics, WaveFormer Lite™ from

SynaptiCAD™, and Designer software from Actel. Refer

to the Libero IDE flow diagram for more information

(located on the Actel website).

Actel Designer software is a place-and-route tool and

provides a comprehensive suite of backend support tools

for FPGA development. The Designer software includes

timing-driven place-and-route, and a world-class

integrated static timing analyzer and constraints editor.

With the Designer software, a user can select and lock

package pins while only minimally impacting the results

of place-and-route. Additionally, the back-annotation

flow is compatible with all the major simulators and the

simulation results can be cross-probed with Silicon

Explorer II, Actel’s integrated verification and logic

analysis tool. Another tool included in the Designer

software is the ACTgen macro builder, which easily

creates popular and commonly used logic functions for

implementation in your schematic or HDL design. Actel's

Designer software is compatible with the most popular

FPGA design entry and verification tools from companies

such as Mentor Graphics, Synplicity, Synopsys, and

Cadence Design Systems. The Designer software is

available for both the Windows and UNIX operating

systems.

Programming

Programming support is provided through Actel's Silicon

Sculptor II, a single-site programmer driven via a PC

based GUI. In addition, BP Microsystems offers multi-site

programmers that provide qualified support for Actel

devices. Factory programming is available for high

volume production needs.

For detail information on programming, visit:

http://www.actel.com/products/tools/prog.aspx .

Related Documents

Application Notes

Global Clock Networks in Actel’s Antifuse Devices

http://www.actel.com/documents/GlobalClk.pdf

Using A54SX72A and RT54SX72S Quadrant Clocks

http://www.actel.com/documents/QCLK.pdf

Implementation of Security in Actel Antifuse FPGAs

http://www.actel.com/documents/

AntifuseSecurityAN.pdf

Actel eX, SX-A, and RTSX-S I/Os

http://www.actel.com/documents/antifuseIOan.pdf

Actel SX-A and RT54SX-S Devices in Hot-Swap and Cold-

Sparing Applications

http://www.actel.com/documents/

HotSwapColdSparing.pdf

Datasheets

HiRel SX-A Family FPGAs

http://www.actel.com/documents/HRSXADS.pdf

SX-A Automotive Family FPGAs

http://www.actel.com/documents/SXAAutoDS.pdf

SX-A Family FPGAs

1-14 v5.1

Pin Description

CLKA/B, I/O Clock A and B

These pins are clock inputs for clock distribution

networks. Input levels are compatible with standard TTL,

LVTTL, LVCMOS2, 3.3 V PCI, or 5 V PCI specifications. The

clock input is buffered prior to clocking the R-cells. When

not used, this pin must be tied Low or High (NOT left

floating) on the board to avoid unwanted power

consumption.

For A54SX72A, these pins can also be configured as user

I/Os. When employed as user I/Os, these pins offer built-

in programmable pull-up or pull-down resistors active

during power-up only. When not used, these pins must

be tied Low or High (NOT left floating).

QCLKA/B/C/D, I/O Quadrant Clock A, B, C, and D

These four pins are the quadrant clock inputs and are

only used for A54SX72A with A, B, C, and D

corresponding to bottom-left, bottom-right, top-left,

and top-right quadrants, respectively. They are clock

inputs for clock distribution networks. Input levels are

compatible with standard TTL, LVTTL, LVCMOS2, 3.3 V

PCI, or 5 V PCI specifications. Each of these clock inputs

can drive up to a quarter of the chip, or they can be

grouped together to drive multiple quadrants. The clock

input is buffered prior to clocking the R-cells. When not

used, these pins must be tied Low or High on the board

(NOT left floating).

These pins can also be configured as user I/Os. When

employed as user I/Os, these pins offer built-in

programmable pull-up or pull-down resistors active

during power-up only.

GND Ground

Low supply voltage.

HCLK Dedicated (Hardwired)

Array Clock

This pin is the clock input for sequential modules. Input

levels are compatible with standard TTL, LVTTL,

LVCMOS2, 3.3 V PCI, or 5 V PCI specifications. This input is

directly wired to each R-cell and offers clock speeds

independent of the number of R-cells being driven.

When not used, HCLK must be tied Low or High on the

board (NOT left floating). When used, this pin should be

held Low or High during power-up to avoid unwanted

static power consumption.

I/O Input/Output

The I/O pin functions as an input, output, tristate, or

bidirectional buffer. Based on certain configurations,

input and output levels are compatible with standard

TTL, LVTTL, LVCMOS2, 3.3 V PCI or 5 V PCI specifications.

Unused I/O pins are automatically tristated by the

Designer software.

NC No Connection

This pin is not connected to circuitry within the device

and can be driven to any voltage or be left floating with

no effect on the operation of the device.

PRA/B, I/O Probe A/B

The Probe pin is used to output data from any user-

defined design node within the device. This independent

diagnostic pin can be used in conjunction with the other

probe pin to allow real-time diagnostic output of any

signal path within the device. The Probe pin can be used

as a user-defined I/O when verification has been

completed. The pin’s probe capabilities can be

permanently disabled to protect programmed design

confidentiality.

TCK, I/O Test Clock

Test clock input for diagnostic probe and device

programming. In Flexible mode, TCK becomes active

when the TMS pin is set Low (refer to Table 1-6 on

page 1-9). This pin functions as an I/O when the

boundary scan state machine reaches the "logic reset"

state.

TDI, I/O Test Data Input

Serial input for boundary scan testing and diagnostic

probe. In Flexible mode, TDI is active when the TMS pin is

set Low (refer to Table 1-6 on page 1-9). This pin

functions as an I/O when the boundary scan state

machine reaches the “logic reset” state.

TDO, I/O Test Data Output

Serial output for boundary scan testing. In flexible mode,

TDO is active when the TMS pin is set Low (refer to

Table 1-6 on page 1-9). This pin functions as an I/O when

the boundary scan state machine reaches the "logic

reset" state. When Silicon Explorer II is being used, TDO

will act as an output when the checksum command is

run. It will return to user /IO when checksum is complete.

TMS Test Mode Select

The TMS pin controls the use of the IEEE 1149.1

Boundary Scan pins (TCK, TDI, TDO, TRST). In flexible

mode when the TMS pin is set Low, the TCK, TDI, and

TDO pins are boundary scan pins (refer to Table 1-6 on

page 1-9). Once the boundary scan pins are in test mode,

they will remain in that mode until the internal

boundary scan state machine reaches the logic reset

state. At this point, the boundary scan pins will be

released and will function as regular I/O pins. The logic

reset state is reached five TCK cycles after the TMS pin is

set High. In dedicated test mode, TMS functions as

specified in the IEEE 1149.1 specifications.

TRST, I/O Boundary Scan Reset Pin

Once it is configured as the JTAG Reset pin, the TRST pin

functions as an active low input to asynchronously

initialize or reset the boundary scan circuit. The TRST pin

is equipped with an internal pull-up resistor. This pin

functions as an I/O when the Reserve JTAG Reset Pin is

not selected in Designer.

VCCI Supply Voltage

Supply voltage for I/Os. See Table 2-2 on page 2-1. All

VCCI power pins in the device should be connected.

VCCA Supply Voltage

Supply voltage for array. See Table 2-2 on page 2-1. All

VCCA power pins in the device should be connected.

SX-A Family FPGAs

v5.1 2-1

Detailed Specifications

Operating Conditions

Typical SX-A Standby Current

Table 2-1 • Absolute Maximum Ratings

Symbol Parameter Limits Units

VCCI DC Supply Voltage for I/Os –0.3 to +6.0 V

VCCA DC Supply Voltage for Arrays –0.3 to +3.0 V

VIInput Voltage –0.5 to +5.75 V

VOOutput Voltage –0.5 to +VCCI+0.5 V

TSTG Storage Temperature –65 to +150 °C

Note: *Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. Exposure to

absolute maximum rated conditions for extended periods may affect device reliability. Devices should not be operated outside the

"Recommended Operating Conditions".

Table 2-2 • Recommended Operating Conditions

Parameter Commercial Industrial Units

Temperature Range 0 to +70 –40 to +85 °C

2.5 V Power Supply Range (VCCA and VCCI) 2.25 to 2.75 2.25 to 2.75 V

3.3 V Power Supply Range (VCCI) 3.0 to 3.6 3.0 to 3.6 V

5 V Power Supply Range (VCCI) 4.75 to 5.25 4.75 to 5.25 V

Table 2-3 • Typical Standby Current for SX-A at 25°C with VCCA = 2.5 V

Product VCCI = 2.5 V VCCI = 3.3 V VCCI = 5 V

A54SX08A 0.8 mA 1.0 mA 2.9 mA

A54SX16A 0.8 mA 1.0 mA 2.9 mA

A54SX32A 0.9 mA 1.0 mA 3.0 mA

A54SX72A 3.6 mA 3.8 mA 4.5 mA

Table 2-4 • Supply Voltages

VCCA VCCI* Maximum Input Tolerance Maximum Output Drive

2. 5 V 2.5 V 5.75 V 2.7 V

2.5 V 3.3 V 5.75 V 3.6 V

2.5 V 5 V 5.75 V 5.25 V

Note: *3.3 V PCI is not 5 V tolerant due to the clamp diode, but instead is 3.3 V tolerant.

SX-A Family FPGAs

2-2 v5.1

Electrical Specifications

Table 2-5 • 3.3 V LVTTL and 5 V TTL Electrical Specifications

Symbol Parameter

Commercial Industrial

Min. Max. Min. Max. Units

VOH VCCI = Minimum

VI = VIH or VIL

(IOH = –1 mA) 0.9 VCCI 0.9 VCCI V

VCCI = Minimum

VI = VIH or VIL

(IOH = –8 mA) 2.4 2.4 V

VOL VCCI = Minimum

VI = VIH or VIL

(IOL= 1 mA) 0.4 0.4 V

VCCI = Minimum

VI = VIH or VIL

(IOL= 12 mA) 0.4 0.4 V

VIL Input Low Voltage 0.8 0.8 V

VIH Input High Voltage 2.0 5.75 2.0 5.75 V

IIL/IIH Input Leakage Current, VIN = VCCI or GND –10 10 –10 10 µA

IOZ Tristate Output Leakage Current –10 10 –10 10 µA

tR, tFInput Transition Time tR, tF10 10 ns

CIO I/O Capacitance 10 10 pF

ICC Standby Current 10 20 mA

IV Curve* Can be derived from the IBIS model on the web.

Note: *The IBIS model can be found at http://www.actel.com/techdocs/models/ibis.html.

Table 2-6 • 2.5 V LVCMOS2 Electrical Specifications

Symbol Parameter

Commercial Industrial

Min. Max. Min. Max. Units

VOH VDD = MIN,

VI = VIH or VIL

(IOH = –100 µA) 2.1 2.1 V

VDD = MIN,

VI = VIH or VIL

(IOH = –1 mA) 2.0 2.0 V

VDD = MIN,

VI = VIH or VIL

(IOH =–-2 mA) 1.7 1.7 V

VOL VDD = MIN,

VI = VIH or VIL

(IOL= 100 µA) 0.2 0.2 V

VDD = MIN,

VI = VIH or VIL

(IOL= 1 mA) 0.4 0.4 V

VDD = MIN,

VI = VIH or VIL

(IOL= 2 mA) 0.7 0.7 V

VIL Input Low Voltage, VOUT ≤ VVOL(max) -0.3 0.7 -0.3 0.7 V

VIH Input High Voltage, VOUT ≥ VVOH(min) 1.75.751.75.75V

IIL/IIH Input Leakage Current, VIN = VCCI or GND –10 10 –10 10 µA

IOZ Tristate Output Leakage Current, VOUT = VCCI or GND –10 10 –10 10 µA

tR, tFInput Transition Time tR, tF10 10 ns

CIO I/O Capacitance 10 10 pF

ICC Standby Current 10 20 mA

IV Curve* Can be derived from the IBIS model on the web.

Note: *The IBIS model can be found at http://www.actel.com/techdocs/models/ibis.html.

SX-A Family FPGAs

v5.1 2-3

PCI Compliance for the SX-A Family

The SX-A family supports 3.3 V and 5 V PCI and is compliant with the PCI Local Bus Specification Rev. 2.1.

Table 2-7 • DC Specifications (5 V PCI Operation)

Symbol Parameter Condition Min. Max. Units

VCCA Supply Voltage for Array 2.25 2.75 V

VCCI Supply Voltage for I/Os 4.75 5.25 V

VIH Input High Voltage 2.0 5.75 V

VIL Input Low Voltage –0.5 0.8 V

IIH Input High Leakage Current1VIN = 2.7 – 70 µA

IIL Input Low Leakage Current1VIN = 0.5 – –70 µA

VOH Output High Voltage IOUT = –2 mA 2.4 – V

VOL Output Low Voltage2IOUT = 3 mA, 6 mA – 0.55 V

CIN Input Pin Capacitance3–10pF

CCLK CLK Pin Capacitance 5 12 pF

Notes:

1. Input leakage currents include hi-Z output leakage for all bidirectional buffers with tristate outputs.

2. Signals without pull-up resistors must have 3 mA low output current. Signals requiring pull-up must have 6 mA; the latter includes

FRAME#, IRDY#, TRDY#, DEVSEL#, STOP#, SERR#, PERR#, LOCK#, and, when used AD[63::32], C/BE[7::4]#, PAR64, REQ64#, and

ACK64#.

3. Absolute maximum pin capacitance for a PCI input is 10 pF (except for CLK).

SX-A Family FPGAs

2-4 v5.1

Table 2-8 • AC Specifications (5 V PCI Operation)

Symbol Parameter Condition Min. Max. Units

IOH(AC) Switching Current High 0 < VOUT ≤ 1.4 1–44 – mA

1.4 ≤ VOUT < 2.4 1, 2 (–44 + (VOUT – 1.4)/0.024) – mA

3.1 < VOUT < VCCI 1, 3 –EQ 2-1 on

page 2-5

–

(Test Point) VOUT = 3.1 3––142mA

IOL(AC) Switching Current Low VOUT ≥ 2.2 195 – mA

2.2 > VOUT > 0.55 1(VOUT/0.023) – mA

0.71 > VOUT > 0 1, 3 –EQ 2-2 on

page 2-5

–

(Test Point) VOUT = 0.71 3– 206 mA

ICL Low Clamp Current –5 < VIN ≤ –1 –25 + (VIN + 1)/0.015 – mA

slewROutput Rise Slew Rate 0.4 V to 2.4 V load 415V/ns

slewFOutput Fall Slew Rate 2.4 V to 0.4 V load 415V/ns

Notes:

1. Refer to the V/I curves in Figure 2-1 on page 2-5. Switching current characteristics for REQ# and GNT# are permitted to be one half

of that specified here; i.e., half size output drivers may be used on these signals. This specification does not apply to CLK and RST#,

which are system outputs. “Switching Current High” specifications are not relevant to SERR#, INTA#, INTB#, INTC#, and INTD#,

which are open drain outputs.

2. Note that this segment of the minimum current curve is drawn from the AC drive point directly to the DC drive point rather than

toward the voltage rail (as is done in the pull-down curve). This difference is intended to allow for an optional N-channel pull-up.

3. Maximum current requirements must be met as drivers pull beyond the last step voltage. Equations defining these maximums (A

and B) are provided with the respective diagrams in Figure 2-1 on page 2-5. The equation defined maximum should be met by

design. In order to facilitate component testing, a maximum current test point is defined for each side of the output driver.

4. This parameter is to be interpreted as the cumulative edge rate across the specified range, rather than the instantaneous rate at any

point within the transition range. The specified load (diagram below) is optional; i.e., the designer may elect to meet this parameter

with an unloaded output per revision 2.0 of the PCI Local Bus Specification. However, adherence to both maximum and minimum

parameters is now required (the maximum is no longer simply a guideline). Since adherence to the maximum slew rate was not

required prior to revision 2.1 of the specification, there may be components in the market for some time that have faster edge

rates; therefore, motherboard designers must bear in mind that rise and fall times faster than this specification could occur and

should ensure that signal integrity modeling accounts for this. Rise slew rate does not apply to open drain outputs.

Output

Buffer

1/2 in. max.

50 pF

SX-A Family FPGAs

v5.1 2-5

Figure 2-1 shows the 5 V PCI V/I curve and the minimum and maximum PCI drive characteristics of the SX-A family.

IOH = 11.9 * (VOUT – 5.25) * (VOUT + 2.45)

for VCCI > VOUT > 3.1V

EQ 2-1

IOL = 78.5 * VOUT * (4.4 – VOUT)

for 0V < VOUT < 0.71V

EQ 2-2

Figure 2-1 • 5 V PCI V/I Curve for SX-A Family

Voltage Out (V)

–200.0

–150.0

–100.0

–50.0

0.0

50.0

100.0

150.0

200.0

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

Current (mA)

IOH

IOL

IOH MIN Spec

IOH MAX Spec

IOL MIN Spec

IOL MAX Spec

Table 2-9 • DC Specifications (3.3 V PCI Operation)

Symbol Parameter Condition Min. Max. Units

VCCA Supply Voltage for Array 2.25 2.75 V

VCCI Supply Voltage for I/Os 3.0 3.6 V

VIH Input High Voltage 0.5VCCI VCCI + 0.5 V

VIL Input Low Voltage –0.5 0.3VCCI V

IIPU Input Pull-up Voltage10.7VCCI –V

IIL Input Leakage Current20 < VIN < VCCI –10 +10 µA

VOH Output High Voltage IOUT = –500 µA 0.9VCCI –V

VOL Output Low Voltage IOUT = 1,500 µA 0.1VCCI V

CIN Input Pin Capacitance3–10pF

CCLK CLK Pin Capacitance 5 12 pF

Notes:

1. This specification should be guaranteed by design. It is the minimum voltage to which pull-up resistors are calculated to pull a

floated network. Designers should ensure that the input buffer is conducting minimum current at this input voltage in applications

sensitive to static power utilization.

2. Input leakage currents include hi-Z output leakage for all bidirectional buffers with tristate outputs.

3. Absolute maximum pin capacitance for a PCI input is 10 pF (except for CLK).

SX-A Family FPGAs

2-6 v5.1

Table 2-10 • AC Specifications (3.3 V PCI Operation)

Symbol Parameter Condition Min. Max. Units

IOH(AC) Switching Current High 0 < VOUT ≤ 0.3VCCI 1–12VCCI –mA

0.3VCCI ≤ VOUT < 0.9VCCI 1(–17.1(VCCI – VOUT)) – mA

0.7VCCI < VOUT < VCCI 1, 2 –EQ 2-3 on

page 2-7

–

(Test Point) VOUT = 0.7VCC 2––32V

CCI mA

IOL(AC) Switching Current Low VCCI > VOUT ≥ 0.6VCCI 116VCCI –mA

0.6VCCI > VOUT > 0.1VCCI 1(26.7VOUT)–mA

0.18VCCI > VOUT > 0 1, 2 –EQ 2-4 on

page 2-7

–

(Test Point) VOUT = 0.18VCC 2 – 38VCCI mA

ICL Low Clamp Current –3 < VIN ≤ –1 –25 + (VIN + 1)/0.015 – mA

ICH High Clamp Current VCCI + 4 > VIN ≥ VCCI + 1 25 + (VIN – VCCI – 1)/0.015 – mA

slewROutput Rise Slew Rate 0.2VCCI - 0.6VCCI load 314V/ns

slewFOutput Fall Slew Rate 0.6VCCI - 0.2VCCI load 314V/ns

Notes:

1. Refer to the V/I curves in Figure 2-2 on page 2-7. Switching current characteristics for REQ# and GNT# are permitted to be one half

of that specified here; i.e., half size output drivers may be used on these signals. This specification does not apply to CLK and RST#,

which are system outputs. “Switching Current High” specifications are not relevant to SERR#, INTA#, INTB#, INTC#, and INTD#,

which are open drain outputs.

2. Maximum current requirements must be met as drivers pull beyond the last step voltage. Equations defining these maximums (C

and D) are provided with the respective diagrams in Figure 2-2 on page 2-7. The equation defined maximum should be met by

design. In order to facilitate component testing, a maximum current test point is defined for each side of the output driver.

3. This parameter is to be interpreted as the cumulative edge rate across the specified range, rather than the instantaneous rate at any

point within the transition range. The specified load (diagram below) is optional; i.e., the designer may elect to meet this parameter

with an unloaded output per the latest revision of the PCI Local Bus Specification. However, adherence to both maximum and

minimum parameters is required (the maximum is no longer simply a guideline). Rise slew rate does not apply to open drain

outputs.

Output

Buffer

1/2 in. max.

10 pF

1 k/25 Ω

Buffer

Output

10 pF

SX-A Family FPGAs

v5.1 2-7

Figure 2-2 shows the 3.3 V PCI V/I curve and the minimum and maximum PCI drive characteristics of the SX-A family.

IOH = (98.0/VCCI) * (VOUT – VCCI) * (VOUT + 0.4VCCI)

for 0.7 VCCI < VOUT < VCCI

EQ 2-3

IOL = (256/VCCI) * VOUT * (VCCI – VOUT)

for 0V < VOUT < 0.18 VCCI

EQ 2-4

Figure 2-2 • 3.3 V PCI V/I Curve for SX-A Family

–150.0

–100.0

–50.0

0.0

50.0

100.0

150.0

0 0.5 1 1.5 2 2.5 3 3.5 4

Voltage Out (V)

Current (mA)

IOH

IOL

IOH MIN Spec

IOH MAX Spec

IOL MIN Spec

IOL MAX Spec

SX-A Family FPGAs

2-8 v5.1

Power Dissipation

A critical element of system reliability is the ability of electronic devices to safely dissipate the heat generated during

operation. The thermal characteristics of a circuit depend on the device and package used, the operating temperature,

the operating current, and the system's ability to dissipate heat.

A complete power evaluation should be performed early in the design process to help identify potential heat-related

problems in the system and to prevent the system from exceeding the device’s maximum allowed junction

temperature.

The actual power dissipated by most applications is significantly lower than the power the package can dissipate.

However, a thermal analysis should be performed for all projects. To perform a power evaluation, follow these steps:

1. Estimate the power consumption of the application.

2. Calculate the maximum power allowed for the device and package.

3. Compare the estimated power and maximum power values.

Estimating Power Dissipation

The total power dissipation for the SX-A family is the sum of the DC power dissipation and the AC power dissipation:

PTotal = PDC + PAC

EQ 2-5

DC Power Dissipation

The power due to standby current is typically a small component of the overall power. An estimation of DC power

dissipation under typical conditions is given by:

PDC = IStandby * VCCA

EQ 2-6

Note: For other combinations of temperature and voltage settings, refer to the eX, SX-A and RT54SX-S Power

Calculator.

AC Power Dissipation

The power dissipation of the SX-A family is usually dominated by the dynamic power dissipation. Dynamic power

dissipation is a function of frequency, equivalent capacitance, and power supply voltage. The AC power dissipation is

defined as follows:

PAC = PC-cells + PR-cells + PCLKA + PCLKB + PHCLK + POutput Buffer + PInput Buffer

EQ 2-7

or:

EQ 2-8

PAC = VCCA2 * [(m * CEQCM * fm)C-cells + (m * CEQSM * fm)R-cells + (n * CEQI * fn)Input Buffer + (p * (CEQO + CL) * fp)Output Buffer

+ (0.5 * (q1 * CEQCR * fq1) + (r1 * fq1))CLKA + (0.5 * (q2 * CEQCR * fq2)+ (r2 * fq2))CLKB + (0.5 * (s1 * CEQHV * fs1) +

(CEQHF * fs1))HCLK]

SX-A Family FPGAs

v5.1 2-9

Where:

CEQCM = Equivalent capacitance of combinatorial modules

(C-cells) in pF

CEQSM = Equivalent capacitance of sequential modules (R-Cells) in pF

CEQI = Equivalent capacitance of input buffers in pF

CEQO = Equivalent capacitance of output buffers in pF

CEQCR = Equivalent capacitance of CLKA/B in pF

CEQHV = Variable capacitance of HCLK in pF

CEQHF = Fixed capacitance of HCLK in pF

CL = Output lead capacitance in pF

fm = Average logic module switching rate in MHz

fn = Average input buffer switching rate in MHz

fp = Average output buffer switching rate in MHz

fq1 = Average CLKA rate in MHz

fq2 = Average CLKB rate in MHz

fs1 = Average HCLK rate in MHz

m = Number of logic modules switching at fm

n = Number of input buffers switching at fn

p = Number of output buffers switching at fp

q1 = Number of clock loads on CLKA

q2 = Number of clock loads on CLKB

r1 = Fixed capacitance due to CLKA

r2 = Fixed capacitance due to CLKB

s1 = Number of clock loads on HCLK

x = Number of I/Os at logic low

y = Number of I/Os at logic high

Table 2-11 • CEQ Values for SX-A Devices

A54SX08A A54SX16A A54SX32A A54SX72A

Combinatorial modules (CEQCM) 1.70 pF 2.00 pF 2.00 pF 1.80 pF

Sequential modules (CEQCM) 1.50 pF 1.50 pF 1.30 pF 1.50 pF

Input buffers (CEQI) 1.30 pF 1.30 pF 1.30 pF 1.30 pF

Output buffers (CEQO) 7.40 pF 7.40 pF 7.40 pF 7.40 pF

Routed array clocks (CEQCR) 1.05 pF 1.05 pF 1.05 pF 1.05 pF

Dedicated array clocks – variable

(CEQHV)

0.85 pF 0.85 pF 0.85 pF 0.85 pF

Dedicated array clocks – fixed (CEQHF) 30.00 pF 55.00 pF 110.00 pF 240.00 pF

Routed array clock A (r1) 35.00 pF 50.00 pF 90.00 pF 310.00 pF

SX-A Family FPGAs

2-10 v5.1

Guidelines for Estimating Power

The following guidelines are meant to represent worst-case scenarios; they can be generally used to predict the upper

limits of power dissipation:

Logic Modules (m) = 20% of modules

Inputs Switching (n) = Number inputs/4

Outputs Switching (p) = Number of outputs/4

CLKA Loads (q1) = 20% of R-cells

CLKB Loads (q2) = 20% of R-cells

Load Capacitance (CL) = 35 pF

Average Logic Module Switching Rate (fm) = f/10

Average Input Switching Rate (fn) =f/5

Average Output Switching Rate (fp) = f/10

Average CLKA Rate (fq1) = f/2

Average CLKB Rate (fq2) = f/2

Average HCLK Rate (fs1) = f

HCLK loads (s1) = 20% of R-cells

To assist customers in estimating the power dissipations of their designs, Actel has published the eX, SX-A and RT54SX-S

Power Calculator worksheet.

SX-A Family FPGAs

v5.1 2-11

Thermal Characteristics

Introduction

The temperature variable in Actel Designer software refers to the junction temperature, not the ambient, case, or

board temperatures. This is an important distinction because dynamic and static power consumption will cause the

chip's junction to be higher than the ambient, case, or board temperatures. EQ 2-9 and EQ 2-10 give the relationship

between thermal resistance, temperature gradient and power.

EQ 2-9

EQ 2-10

Where:

θJA

TJTA

–

----------------=

θJA

TCTA

–

------------------=

θJA =Junction-to-air thermal resistance

θJC =Junction-to-case thermal resistance

TJ= Junction temperature

TA= Ambient temperature

TC= Ambient temperature

P = total power dissipated by the device

Table 2-12 • Package Thermal Characteristics

Package Type

Count θJC

θJA

UnitsStill Air

1.0 m/s

200 ft./min.

2.5 m/s

500 ft./min.

Thin Quad Flat Pack (TQFP) 100 14 33.5 27.4 25 °C/W

Thin Quad Flat Pack (TQFP) 144 11 33.5 28 25.7 °C/W

Thin Quad Flat Pack (TQFP) 176 11 24.7 19.9 18 °C/W

Plastic Quad Flat Pack (PQFP)1208 8 26.1 22.5 20.8 °C/W

Plastic Quad Flat Pack (PQFP) with Heat Spreader2208 3.8 16.2 13.3 11.9 °C/W

Plastic Ball Grid Array (PBGA) 329 3 17.1 13.8 12.8 °C/W

Fine Pitch Ball Grid Array (FBGA) 144 3.8 26.9 22.9 21.5 °C/W

Fine Pitch Ball Grid Array (FBGA) 256 3.8 26.6 22.8 21.5 °C/W

Fine Pitch Ball Grid Array (FBGA) 484 3.2 18 14.7 13.6 °C/W

Notes:

1. The A54SX08A PQ208 has no heat spreader.

2. The SX-A PQ208 package has a heat spreader for A54SX16A, A54SX32A, and A54SX72A.

SX-A Family FPGAs

2-12 v5.1

Theta-JA

Junction-to-ambient thermal resistance (θJA) is determined under standard conditions specified by JESD-51 series but

has little relevance in actual performance of the product in real application. It should be employed with caution but is

useful for comparing the thermal performance of one package to another.

A sample calculation to estimate the absolute maximum power dissipation allowed (worst case) for a 329-pin PBGA

package at still air is as follows. i.e.:

EQ 2-11

The device's power consumption must be lower than the calculated maximum power dissipation by the package.

The power consumption of a device can be calculated using the Actel power calculator. If the power consumption is

higher than the device's maximum allowable power dissipation, then a heat sink can be attached on top of the case or

the airflow inside the system must be increased.

Theta-JC

Junction-to-case thermal resistance (θJC) measures the ability of a device to dissipate heat from the surface of the chip

to the top or bottom surface of the package. It is applicable for packages used with external heat sinks and only

applies to situations where all or nearly all of the heat is dissipated through the surface in consideration. If the power

consumption is higher than the calculated maximum power dissipation of the package, then a heat sink is required.

Calculation for Heat Sink

For example, in a design implemented in a FG484 package, the power consumption value using the power calculator is

3.00 W. The user-dependent data TJ and TA are given as follows:

From the datasheet:

EQ 2-12

The 2.22 W power is less than then required 3.00 W; therefore, the design requires a heat sink or the airflow where the

device is mounted should be increased. The design's junction-to-air thermal resistance requirement can be estimated

by:

EQ 2-13

θJA = 17.1°C/W is taken from Table 2-12 on page 2-11

TA= 125°C is the maximum limit of ambient (from the datasheet)

Max. Allowed Power Max Junction Temp Max. Ambient Temp–

θJA

------------------------------------------------------------------------------------------------------------150°C 125°C–

17.1°C/W

----------------------------------------1.46 W===

TJ=110°C

TA=70°C

θJA =18.0°C/W

θJC =3.2 °C/W

PMax Junction Temp Max. Ambient Temp–

θJA

------------------------------------------------------------------------------------------------------------110°C70°C–

18.0°C/W

------------------------------------ 2.22 W===

θJA

Max Junction Temp Max. Ambient Temp–

------------------------------------------------------------------------------------------------------------110°C70°C–

3.00 W

------------------------------------ 13.33°C/W===

SX-A Family FPGAs

v5.1 2-13

To determine the heat sink's thermal performance, use the following equation:

EQ 2-14

where:

EQ 2-15

A heat sink with a thermal resistance of 9.76°C/W or better should be used. Thermal resistance of heat sinks is a

function of airflow. The heat sink performance can be significantly improved with the presence of airflow.

Carefully estimating thermal resistance is important in the long-term reliability of an Actel FPGA. Design engineers

should always correlate the power consumption of the device with the maximum allowable power dissipation of the

package selected for that device, using the provided thermal resistance data.

Note: The values may vary depending on the application.

θJA(TOTAL) θJC θCS θSA

++=

θCS = 0.37°C/W

= thermal resistance of the interface material between the case and the heat

sink, usually provided by the thermal interface manufacturer

θSA = thermal resistance of the heat sink in °C/W

θSA θJA(TOTAL) θJC

–θCS

–=

θSA 13.33°C/W 3.20°C/W–0.37°C/W–=

θSA 9.76°C/W=

SX-A Family FPGAs

2-14 v5.1

SX-A Timing Model

Sample Path Calculations

Hardwired Clock Routed Clock

Note: *Values shown for A54SX72A, –3, worst-case commercial conditions at 5 V PCI with standard place-and-route.

Figure 2-3 • SX-A Timing Model

Input Delays Internal Delays Predicted

Routing

Delays

Output Delays

I/O Module

tINYH= 0.5 ns tRD2 = 0.4 ns

tRD1 = 0.3 ns Combinatorial

Cell I/O Module

tDHL = 2.7 ns

tRD8 = 1.2 ns

tRD4 = 0.7 ns

tRD1 = 0.3 ns

tPD = 1.0 ns

I/O Module

tDHL = 2.7 ns

tRD1 = 0.3 ns

tRCO= 0.7 ns

I/O Module

tINYH= 0.5 ns

tENZL= 1.3 ns

tSUD = 0.7 ns

tHD = 0.0 ns

tSUD = 0.7 ns

tHD = 0.0 ns

tRCKH = 2.6 ns

(100% Load)

Cell

Routed

Clock

tRD1 = 0.3 ns

tRCO= 0.7 ns

tHCKH= 1.6 ns

Cell

Hardwired

Clock

I/O Module

tDHL = 2.7 ns

tENZL= 1.3 ns

External Setup = (tINYH + tIRD1 + tSUD) – tHCKH

= 0.5 + 0.3 + 0.7 - 1.6 = – 0.1 ns

Clock-to-Out (Pad-to-Pad) = tHCKH + tRCO + tRD1 + tDHL

= 1.6+0.7+0.3+2.7 = 5.3 ns

External Setup = (tINYH + tIRD1 + tSUD) – tRCKH

= 0.5 + 0.3 + 0.7 - 2.6 = –1.1

Clock-to-Out (Pad-to-Pad) = tRCKH + tRCO + tRD1 + tDHL

= 2.6 + 0.7 + 0.3 + 2.7 = 6.3 ns

SX-A Family FPGAs

v5.1 2-15

Output Buffer Delays

AC Test Loads

Figure 2-4 • Output Buffer Delays

To AC Test Loads (shown below)PAD

TRIBU FF

In GND

50%

Out 1.5 V

50%

1.5 V

En GND

50%

Out 1.5 V

50%

10%

En GND

50%

Out

GND 1.5 V

50%

90%

VOL

VCC

VOH

tENZH tENHZ

tENZL tENLZ

tDLH

Figure 2-5 • AC Test Loads

35 pF

VCC GND

35 pF

VCC GND

5 pF

R to VCC for tPZL

R to GND for tPZH

R = 1 kΩ

R to VCC for tPZL

R to GND for tPZH

R = 1 kΩ

To the Output

Under Test To the Output

Under Test

To the Output

Under Test

Load 1

(Used to measure

propagation delay)

Load 2

(Used to measure enable delays)

Load 3

(Used to measure disable delays)

SX-A Family FPGAs

2-16 v5.1

Input Buffer Delays C-Cell Delays

Cell Timing Characteristics

Figure 2-6 • Input Buffer Delays

PAD Y

INBUF

3 V

0 V

1.5 V

Out

GND

50%

1.5 V

50%

VCC

tINY tINY

Figure 2-7 • C-Cell Delays

S, A, or B

Out

GND

50%

Out

GND

50%

50% 50%

Figure 2-8 • Flip-Flops

(Positive Edge Triggered)

CLK CLR

CLK

CLR

HPWH

WASYN

SUD

HPWL

RCO

CLR

RPWL

RPWH

PRESET

SX-A Family FPGAs

v5.1 2-17

Timing Characteristics

Timing characteristics for SX-A devices fall into three

categories: family-dependent, device-dependent, and

design-dependent. The input and output buffer

characteristics are common to all SX-A family members.

Internal routing delays are device-dependent. Design

dependency means actual delays are not determined

until after placement and routing of the user’s design are

complete. The timing characteristics listed in this

datasheet represent sample timing numbers of the SX-A

devices. Design-specific delay values may be determined

by using Timer or performing simulation after successful

place-and-route with the Designer software.

Critical Nets and Typical Nets

Propagation delays are expressed only for typical nets,

which are used for initial design performance evaluation.

Critical net delays can then be applied to the most

timing-critical paths. Critical nets are determined by net

property assignment prior to placement and routing. Up

to 6 percent of the nets in a design may be designated as

critical, while 90 percent of the nets in a design are

typical.

Long Tracks

Some nets in the design use long tracks. Long tracks are

special routing resources that span multiple rows,

columns, or modules. Long tracks employ three to five

antifuse connections. This increases capacitance and

resistance, resulting in longer net delays for macros

connected to long tracks. Typically, up to 6 percent of

nets in a fully utilized device require long tracks. Long

tracks contribute approximately 4 ns to 8.4 ns delay. This

additional delay is represented statistically in higher

fanout routing delays.

Timing Derating

SX-A devices are manufactured with a CMOS process.

Therefore, device performance varies according to

temperature, voltage, and process changes. Minimum

timing parameters reflect maximum operating voltage,

minimum operating temperature, and best-case

processing. Maximum timing parameters reflect

minimum operating voltage, maximum operating

temperature, and worst-case processing.

Temperature and Voltage Derating Factors

Table 2-13 • Temperature and Voltage Derating Factors

(Normalized to Worst-Case Commercial, TJ = 70°C, VCCA = 2.25 V)

VCCA

Junction Temperature (TJ)

–55°C –40°C 0°C 25°C 70°C 85°C 125°C

2.250 V 0.790.800.870.891.001.041.14

2.500 V 0.740.750.820.830.940.971.07

2.750 V 0.680.690.750.770.870.900.99

SX-A Family FPGAs

2-18 v5.1

Timing Characteristics

Table 2-14 • A54SX08A Timing Characteristics

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

C-Cell Propagation Delays1

tPD Internal Array Module 0.9 1.1 1.2 1.7 ns

Predicted Routing Delays2

tDC FO = 1 Routing Delay, Direct Connect 0.1 0.1 0.1 0.1 ns

tFC FO = 1 Routing Delay, Fast Connect 0.3 0.3 0.4 0.6 ns

tRD1 FO = 1 Routing Delay 0.3 0.4 0.5 0.6 ns

tRD2 FO = 2 Routing Delay 0.5 0.5 0.6 0.8 ns

tRD3 FO = 3 Routing Delay 0.6 0.7 0.8 1.1 ns

tRD4 FO = 4 Routing Delay 0.8 0.9 1 1.4 ns

tRD8 FO = 8 Routing Delay 1.4 1.5 1.8 2.5 ns

tRD12 FO = 12 Routing Delay 2 2.2 2.6 3.6 ns

R-Cell Timing

tRCO Sequential Clock-to-Q 0.7 0.8 0.9 1.3 ns

tCLR Asynchronous Clear-to-Q 0.6 0.6 0.8 1.0 ns

tPRESET Asynchronous Preset-to-Q 0.7 0.7 0.9 1.2 ns

tSUD Flip-Flop Data Input Set-Up 0.7 0.8 0.9 1.2 ns

tHD Flip-Flop Data Input Hold 0.0 0.0 0.0 0.0 ns

tWASYN Asynchronous Pulse Width 1.4 1.5 1.8 2.5 ns

tRECASYN Asynchronous Recovery Time 0.4 0.4 0.5 0.7 ns

tHASYN Asynchronous Hold Time 0.3 0.3 0.4 0.6 ns

tMPW Clock Pulse Width 1.6 1.8 2.1 2.9 ns

Input Module Propagation Delays

tINYH Input Data Pad to Y High 2.5 V LVCMOS 0.8 0.9 1.0 1.4 ns

tINYL Input Data Pad to Y Low 2.5 V LVCMOS 1.0 1.2 1.4 1.9 ns

tINYH Input Data Pad to Y High 3.3 V PCI 0.6 0.6 0.7 1.0 ns

tINYL Input Data Pad to Y Low 3.3 V PCI 0.7 0.8 0.9 1.3 ns

tINYH Input Data Pad to Y High 3.3 V LVTTL 0.7 0.7 0.9 1.2 ns

tINYL Input Data Pad to Y Low 3.3 V LVTTL 1.0 1.1 1.3 1.8 ns

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

v5.1 2-19

tINYH Input Data Pad to Y High 5 V PCI 0.5 0.6 0.7 0.9 ns

tINYL Input Data Pad to Y Low 5 V PCI 0.8 0.9 1.1 1.5 ns

tINYH Input Data Pad to Y High 5 V TTL 0.5 0.6 0.7 0.9 ns

tINYL Input Data Pad to Y Low 5 V TTL 0.8 0.9 1.1 1.5 ns

Input Module Predicted Routing Delays2

tIRD1 FO = 1 Routing Delay 0.3 0.3 0.4 0.6 ns

tIRD2 FO = 2 Routing Delay 0.5 0.5 0.6 0.8 ns

tIRD3 FO = 3 Routing Delay 0.6 0.7 0.8 1.1 ns

tIRD4 FO = 4 Routing Delay 0.8 0.9 1 1.4 ns

tIRD8 FO = 8 Routing Delay 1.4 1.5 1.8 2.5 ns

tIRD12 FO = 12 Routing Delay 2 2.2 2.6 3.6 ns

Table 2-14 • A54SX08A Timing Characteristics (Continued)

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

2-20 v5.1

Table 2-15 • A54SX08A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.25 V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.4 1.6 1.8 2.6 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.3 1.5 1.7 2.4 ns

tHPWH Minimum Pulse Width High 1.6 1.8 2.1 2.9 ns

tHPWL Minimum Pulse Width Low 1.6 1.8 2.1 2.9 ns

tHCKSW Maximum Skew 0.4 0.4 0.5 0.7 ns

tHP Minimum Period 3.2 3.6 4.2 5.8 ns

fHMAX Maximum Frequency 313 278 238 172 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

1.0 1.1 1.3 1.8 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.1 1.2 1.4 2.0 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

1.0 1.1 1.3 1.8 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.1 1.2 1.4 2.0 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.1 1.2 1.4 2.0 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2.4 ns

tRPWH Minimum Pulse Width High 1.6 1.8 2.1 2.9 ns

tRPWL Minimum Pulse Width Low 1.6 1.8 2.1 2.9 ns

tRCKSW Maximum Skew (Light Load) 0.7 0.8 0.9 1.3 ns

tRCKSW Maximum Skew (50% Load) 0.7 0.8 0.9 1.3 ns

tRCKSW Maximum Skew (100% Load) 0.9 1.0 1.2 1.7 ns

SX-A Family FPGAs

v5.1 2-21

Table 2-16 • A54SX08A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.3 1.5 1.7 2.6 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.1 1.3 1.5 2.2 ns

tHPWH Minimum Pulse Width High 1.6 1.8 2.1 2.9 ns

tHPWL Minimum Pulse Width Low 1.6 1.8 2.1 2.9 ns

tHCKSW Maximum Skew 0.4 0.5 0.5 0.8 ns

tHP Minimum Period 3.2 3.6 4.2 5.8 ns

fHMAX Maximum Frequency 313 278 238 172 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

0.8 0.9 1.1 1.5 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.1 1.2 1.4 2 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

0.8 0.9 1.1 1.5 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.1 1.2 1.4 2 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.1 1.2 1.4 1.9 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.2 1.3 1.6 2.2 ns

tRPWH Minimum Pulse Width High 1.6 1.8 2.1 2.9 ns

tRPWL Minimum Pulse Width Low 1.6 1.8 2.1 2.9 ns

tRCKSW Maximum Skew (Light Load) 0.7 0.8 0.9 1.3 ns

tRCKSW Maximum Skew (50% Load) 0.7 0.8 0.9 1.3 ns

tRCKSW Maximum Skew (100% Load) 0.8 0.9 1.1 1.5 ns

SX-A Family FPGAs

2-22 v5.1

Table 2-17 • A54SX08A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.2 1.3 1.5 2.3 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.0 1.2 1.4 2.0 ns

tHPWH Minimum Pulse Width High 1.6 1.8 2.1 2.9 ns

tHPWL Minimum Pulse Width Low 1.6 1.8 2.1 2.9 ns

tHCKSW Maximum Skew 0.4 0.4 0.5 0.8 ns

tHP Minimum Period 3.2 3.6 4.2 5.8 ns

fHMAX Maximum Frequency 313 278 238 172 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

0.9 1.0 1.2 1.7 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.5 1.7 2.0 2.7 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

0.9 1.0 1.2 1.7 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.5 1.7 2.0 2.7 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.1 1.3 1.5 2.1 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.6 1.8 2.1 2.9 ns

tRPWH Minimum Pulse Width High 1.6 1.8 2.1 2.9 ns

tRPWL Minimum Pulse Width Low 1.6 1.8 2.1 2.9 ns

tRCKSW Maximum Skew (Light Load) 0.8 0.9 1.1 1.5 ns

tRCKSW Maximum Skew (50% Load) 0.8 1.0 1.1 1.5 ns

tRCKSW Maximum Skew (100% Load) 0.9 1.0 1.2 1.7 ns

SX-A Family FPGAs

v5.1 2-23

Table 2-18 • A54SX08A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.3V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

2.5 V LVCMOS Output Module Timing1,2

tDLH Data-to-Pad Low to High 3.9 4.4 5.2 7.2 ns

tDHL Data-to-Pad High to Low 3.0 3.4 3.9 5.5 ns

tDHLS Data-to-Pad High to Low—low slew 13.3 15.1 17.7 24.8 ns

tENZL Enable-to-Pad, Z to L 2.8 3.2 3.7 5.2 ns

tENZLS Data-to-Pad, Z to L—low slew 13.7 15.5 18.2 25.5 ns

tENZH Enable-to-Pad, Z to H 3.9 4.4 5.2 7.2 ns

tENLZ Enable-to-Pad, L to Z 2.5 2.8 3.3 4.7 ns

tENHZ Enable-to-Pad, H to Z 3.0 3.4 3.9 5.5 ns

dTLH3Delta Low to High 0.037 0.043 0.051 0.071 ns/pF

dTHL3Delta High to Low 0.017 0.023 0.023 0.037 ns/pF

dTHLS3Delta High to Low—low slew 0.06 0.071 0.086 0.117 ns/pF

Note:

1. Delays based on 35 pF loading.

2. The equivalent I/O Attribute Editor settings for 2.5 V LVCMOS is 2.5 V LVTTL in the software.

3. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

SX-A Family FPGAs

2-24 v5.1

Table 2-19 • A54SX08A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

3.3 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 2.2 2.4 2.9 4.0 ns

tDHL Data-to-Pad High to Low 2.3 2.6 3.1 4.3 ns

tENZL Enable-to-Pad, Z to L 1.7 1.9 2.2 3.1 ns

tENZH Enable-to-Pad, Z to H 2.2 2.4 2.9 4.0 ns

tENLZ Enable-to-Pad, L to Z 2.8 3.2 3.8 5.3 ns

tENHZ Enable-to-Pad, H to Z 2.3 2.6 3.1 4.3 ns

dTLH2Delta Low to High 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.025 ns/pF

3.3 V LVTTL Output Module Timing3

tDLH Data-to-Pad Low to High 3.0 3.4 4.0 5.6 ns

tDHL Data-to-Pad High to Low 3.0 3.3 3.9 5.5 ns

tDHLS Data-to-Pad High to Low—low slew 10.4 11.8 13.8 19.3 ns

tENZL Enable-to-Pad, Z to L 2.6 2.9 3.4 4.8 ns

tENZLS Enable-to-Pad, Z to L—low slew 18.9 21.3 25.4 34.9 ns

tENZH Enable-to-Pad, Z to H 3 3.4 4 5.6 ns

tENLZ Enable-to-Pad, L to Z 3.3 3.7 4.4 6.2 ns

tENHZ Enable-to-Pad, H to Z 3 3.3 3.9 5.5 ns

dTLH2Delta Low to High 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.025 ns/pF

dTHLS2Delta High to Low—low slew 0.053 0.067 0.073 0.107 ns/pF

Notes:

1. Delays based on 10 pF loading and 25 Ω resistance.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

v5.1 2-25

Table 2-20 • A54SX08A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max.

5 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 2.4 2.8 3.2 4.5 ns

tDHL Data-to-Pad High to Low 3.2 3.6 4.2 5.9 ns

tENZL Enable-to-Pad, Z to L 1.5 1.7 2.0 2.8 ns

tENZH Enable-to-Pad, Z to H 2.4 2.8 3.2 4.5 ns

tENLZ Enable-to-Pad, L to Z 3.5 3.9 4.6 6.4 ns

tENHZ Enable-to-Pad, H to Z 3.2 3.6 4.2 5.9 ns

dTLH2Delta Low to High 0.016 0.02 0.022 0.032 ns/pF

dTHL2Delta High to Low 0.03 0.032 0.04 0.052 ns/pF

5 V TTL Output Module Timing3

tDLH Data-to-Pad Low to High 2.4 2.8 3.2 4.5 ns

tDHL Data-to-Pad High to Low 3.2 3.6 4.2 5.9 ns

tDHLS Data-to-Pad High to Low—low slew 7.6 8.6 10.1 14.2 ns

tENZL Enable-to-Pad, Z to L 2.4 2.7 3.2 4.5 ns

tENZLS Enable-to-Pad, Z to L—low slew 8.4 9.5 11.0 15.4 ns

tENZH Enable-to-Pad, Z to H 2.4 2.8 3.2 4.5 ns

tENLZ Enable-to-Pad, L to Z 4.2 4.7 5.6 7.8 ns

tENHZ Enable-to-Pad, H to Z 3.2 3.6 4.2 5.9 ns

dTLH Delta Low to High 0.017 0.017 0.023 0.031 ns/pF

dTHL Delta High to Low 0.029 0.031 0.037 0.051 ns/pF

dTHLS Delta High to Low—low slew 0.046 0.057 0.066 0.089 ns/pF

Notes:

1. Delays based on 50 pF loading.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

2-26 v5.1

Table 2-21 • A54SX16A Timing Characteristics

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

C-Cell Propagation Delays1

tPD Internal Array Module 0.9 1.0 1.2 1.4 1.9 ns

Predicted Routing Delays2

tDC FO = 1 Routing Delay, Direct

Connect

0.1 0.1 0.1 0.1 0.1 ns

tFC FO = 1 Routing Delay, Fast Connect 0.3 0.3 0.3 0.4 0.6 ns

tRD1 FO = 1 Routing Delay 0.3 0.3 0.4 0.5 0.6 ns

tRD2 FO = 2 Routing Delay 0.4 0.5 0.5 0.6 0.8 ns

tRD3 FO = 3 Routing Delay 0.5 0.6 0.7 0.8 1.1 ns

tRD4 FO = 4 Routing Delay 0.7 0.8 0.9 1 1.4 ns

tRD8 FO = 8 Routing Delay 1.2 1.4 1.5 1.8 2.5 ns

tRD12 FO = 12 Routing Delay 1.7 2 2.2 2.6 3.6 ns

R-Cell Timing

tRCO Sequential Clock-to-Q 0.6 0.7 0.8 0.9 1.3 ns

tCLR Asynchronous Clear-to-Q 0.5 0.6 0.6 0.8 1.0 ns

tPRESET Asynchronous Preset-to-Q 0.7 0.8 0.8 1.0 1.4 ns

tSUD Flip-Flop Data Input Set-Up 0.7 0.8 0.9 1.0 1.4 ns

tHD Flip-Flop Data Input Hold 0.0 0.0 0.0 0.0 0.0 ns

tWASYN Asynchronous Pulse Width 1.3 1.5 1.6 1.9 2.7 ns

tRECASYN Asynchronous Recovery Time 0.3 0.4 0.4 0.5 0.7 ns

tHASYN Asynchronous Removal Time 0.3 0.3 0.3 0.4 0.6 ns

tMPW Clock Minimum Pulse Width 1.4 1.7 1.9 2.2 3.0 ns

Input Module Propagation Delays

tINYH Input Data Pad to Y High 2.5 V

LVCMOS

0.5 0.6 0.7 0.8 1.1 ns

tINYL Input Data Pad to Y Low 2.5 V

LVCMOS

0.8 0.9 1.0 1.1 1.6 ns

tINYH Input Data Pad to Y High 3.3 V PCI 0.5 0.6 0.6 0.7 1.0 ns

tINYL Input Data Pad to Y Low 3.3 V PCI 0.7 0.8 0.9 1.0 1.4 ns

tINYH Input Data Pad to Y High 3.3 V

LVTTL

0.7 0.7 0.8 1.0 1.4 ns

tINYL Input Data Pad to Y Low 3.3 V LVTTL 0.9 1.1 1.2 1.4 2.0 ns

tINYH Input Data Pad to Y High 5 V PCI 0.5 0.5 0.6 0.7 0.9 ns

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

v5.1 2-27

tINYL Input Data Pad to Y Low 5 V PCI 0.7 0.8 0.9 1.1 1.5 ns

tINYH Input Data Pad to Y High 5 V TTL 0.5 0.5 0.6 0.7 0.9 ns

tINYL Input Data Pad to Y Low 5 V TTL 0.7 0.8 0.9 1.1 1.5 ns

Input Module Predicted Routing Delays2

tIRD1 FO = 1 Routing Delay 0.3 0.3 0.3 0.4 0.6 ns

tIRD2 FO = 2 Routing Delay 0.4 0.5 0.5 0.6 0.8 ns

tIRD3 FO = 3 Routing Delay 0.5 0.6 0.7 0.8 1.1 ns

tIRD4 FO = 4 Routing Delay 0.7 0.8 0.9 1.0 1.4 ns

tIRD8 FO = 8 Routing Delay 1.2 1.4 1.5 0.8 2.5 ns

tIRD12 FO = 12 Routing Delay 1.7 2.0 2.2 2.6 3.6 ns

Table 2-21 • A54SX16A Timing Characteristics (Continued)

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

2-28 v5.1

Table 2-22 • A54SX16A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.25 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.2 1.4 1.6 1.8 2.8 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.0 1.1 1.2 1.5 2.2 ns

tHPWH Minimum Pulse Width High 1.4 1.7 1.9 2.2 3.0 ns

tHPWL Minimum Pulse Width Low 1.4 1.7 1.9 2.2 3.0 ns

tHCKSW Maximum Skew 0.3 0.3 0.4 0.4 0.7 ns

tHP Minimum Period 2.8 3.4 3.8 4.4 6.0 ns

fHMAX Maximum Frequency 357 294 263 227 167 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

1.0 1.2 1.3 1.6 2.2 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2.0 2.8 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2.0 2.8 ns

tRPWH Minimum Pulse Width High 1.4 1.7 1.9 2.2 3.0 ns

tRPWL Minimum Pulse Width Low 1.4 1.7 1.9 2.2 3.0 ns

tRCKSW Maximum Skew (Light Load) 0.8 0.9 1.0 1.2 1.7 ns

tRCKSW Maximum Skew (50% Load) 0.8 0.9 1.0 1.2 1.7 ns

tRCKSW Maximum Skew (100% Load) 1.0 1.1 1.3 1.5 2.1 ns

SX-A Family FPGAs

v5.1 2-29

Table 2-23 • A54SX16A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.2 1.4 1.6 1.8 2.8 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.0 1.1 1.3 1.5 2.2 ns

tHPWH Minimum Pulse Width High 1.4 1.7 1.9 2.2 3.0 ns

tHPWL Minimum Pulse Width Low 1.4 1.7 1.9 2.2 3.0 ns

tHCKSW Maximum Skew 0.3 0.3 0.4 0.4 0.6 ns

tHP Minimum Period 2.8 3.4 3.8 4.4 6.0 ns

fHMAX Maximum Frequency 357 294 263 227 167 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

1.0 1.2 1.3 1.5 2.1 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

1.1 1.3 1.4 1.7 2.3 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2.0 2.7 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2.0 2.8 ns

tRPWH Minimum Pulse Width High 1.4 1.7 1.9 2.2 3.0 ns

tRPWL Minimum Pulse Width Low 1.4 1.7 1.9 2.2 3.0 ns

tRCKSW Maximum Skew (Light Load) 0.8 0.9 1.0 1.2 1.7 ns

tRCKSW Maximum Skew (50% Load) 0.8 0.9 1.0 1.2 1.7 ns

tRCKSW Maximum Skew (100% Load) 1.0 1.1 1.3 1.5 2.1 ns

SX-A Family FPGAs

2-30 v5.1

Table 2-24 • A54SX16A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI =4.75 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.2 1.4 1.6 1.8 2.8 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.0 1.1 1.2 1.5 2.2 ns

tHPWH Minimum Pulse Width High 1.4 1.7 1.9 2.2 3.0 ns

tHPWL Minimum Pulse Width Low 1.4 1.7 1.9 2.2 3.0 ns

tHCKSW Maximum Skew 0.3 0.3 0.4 0.4 0.7 ns

tHP Minimum Period 2.8 3.4 3.8 4.4 6.0 ns

fHMAX Maximum Frequency 357 294 263 227 167 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

1.0 1.2 1.3 1.6 2.2 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.1 1.3 1.5 1.7 2.4 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2.0 2.8 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2.0 2.8 ns

tRPWH Minimum Pulse Width High 1.4 1.7 1.9 2.2 3.0 ns

tRPWL Minimum Pulse Width Low 1.4 1.7 1.9 2.2 3.0 ns

tRCKSW Maximum Skew (Light Load) 0.8 0.9 1.0 1.2 1.7 ns

tRCKSW Maximum Skew (50% Load) 0.8 0.9 1.0 1.2 1.7 ns

tRCKSW Maximum Skew (100% Load) 1.0 1.1 1.3 1.5 2.1 ns

SX-A Family FPGAs

v5.1 2-31

Table 2-25 • A54SX16A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.25 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

2.5 V LVCMOS Output Module Timing 1, 2

tDLH Data-to-Pad Low to High 3.4 3.9 4.5 5.2 7.3 ns

tDHL Data-to-Pad High to Low 2.6 3.0 3.3 3.9 5.5 ns

tDHLS Data-to-Pad High to Low—low slew 11.6 13.4 15.2 17.9 25.0 ns

tENZL Enable-to-Pad, Z to L 2.4 2.8 3.2 3.7 5.2 ns

tENZLS Data-to-Pad, Z to L—low slew 11.8 13.7 15.5 18.2 25.5 ns

tENZH Enable-to-Pad, Z to H 3.4 3.9 4.5 5.2 7.3 ns

tENLZ Enable-to-Pad, L to Z 2.1 2.5 2.8 3.3 4.7 ns

tENHZ Enable-to-Pad, H to Z 2.6 3.0 3.3 3.9 5.5 ns

dTLH3Delta Low to High 0.031 0.037 0.043 0.051 0.071 ns/pF

dTHL3Delta High to Low 0.017 0.017 0.023 0.023 0.037 ns/pF

dTHLS3Delta High to Low—low slew 0.057 0.06 0.071 0.086 0.117 ns/pF

Note:

1. Delays based on 35 pF loading.

2. The equivalent IO Attribute settings for 2.5 V LVCMOS is 2.5 V LVTTL in the software.

3. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

SX-A Family FPGAs

2-32 v5.1

Table 2-26 • A54SX16A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

3.3 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 2.0 2.3 2.6 3.1 4.3 ns

tDHL Data-to-Pad High to Low 2.2 2.5 2.8 3.3 4.6 ns

tENZL Enable-to-Pad, Z to L 1.4 1.7 1.9 2.2 3.1 ns

tENZH Enable-to-Pad, Z to H 2.0 2.3 2.6 3.1 4.3 ns

tENLZ Enable-to-Pad, L to Z 2.5 2.8 3.2 3.8 5.3 ns

tENHZ Enable-to-Pad, H to Z 2.2 2.5 2.8 3.3 4.6 ns

dTLH2Delta Low to High 0.025 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.015 0.025 ns/pF

3.3 V LVTTL Output Module Timing3

tDLH Data-to-Pad Low to High 2.8 3.2 3.6 4.3 6.0 ns

tDHL Data-to-Pad High to Low 2.7 3.1 3.5 4.1 5.7 ns

tDHLS Data-to-Pad High to Low—low slew 9.5 10.9 12.4 14.6 20.4 ns

tENZL Enable-to-Pad, Z to L 2.2 2.6 2.9 3.4 4.8 ns

tENZLS Enable-to-Pad, Z to L—low slew 15.8 18.9 21.3 25.4 34.9 ns

tENZH Enable-to-Pad, Z to H 2.8 3.2 3.6 4.3 6.0 ns

tENLZ Enable-to-Pad, L to Z 2.9 3.3 3.7 4.4 6.2 ns

tENHZ Enable-to-Pad, H to Z 2.7 3.1 3.5 4.1 5.7 ns

dTLH2Delta Low to High 0.025 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.015 0.025 ns/pF

dTHLS2Delta High to Low—low slew 0.053 0.053 0.067 0.073 0.107 ns/pF

Notes:

1. Delays based on 10 pF loading and 25 Ω resistance.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

v5.1 2-33

Table 2-27 • A54SX16A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

5 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 2.2 2.5 2.8 3.3 4.6 ns

tDHL Data-to-Pad High to Low 2.8 3.2 3.6 4.2 5.9 ns

tENZL Enable-to-Pad, Z to L 1.3 1.5 1.7 2.0 2.8 ns

tENZH Enable-to-Pad, Z to H 2.2 2.5 2.8 3.3 4.6 ns

tENLZ Enable-to-Pad, L to Z 3.0 3.5 3.9 4.6 6.4 ns

tENHZ Enable-to-Pad, H to Z 2.8 3.2 3.6 4.2 5.9 ns

dTLH2Delta Low to High 0.016 0.016 0.02 0.022 0.032 ns/pF

dTHL2Delta High to Low 0.026 0.03 0.032 0.04 0.052 ns/pF

5 V TTL Output Module Timing3

tDLH Data-to-Pad Low to High 2.2 2.5 2.8 3.3 4.6 ns

tDHL Data-to-Pad High to Low 2.8 3.2 3.6 4.2 5.9 ns

tDHLS Data-to-Pad High to Low—low slew 6.7 7.7 8.7 10.2 14.3 ns

tENZL Enable-to-Pad, Z to L 2.1 2.4 2.7 3.2 4.5 ns

tENZLS Enable-to-Pad, Z to L—low slew 7.4 8.4 9.5 11.0 15.4 ns

tENZH Enable-to-Pad, Z to H 1.9 2.2 2.5 2.9 4.1 ns

tENLZ Enable-to-Pad, L to Z 3.6 4.2 4.7 5.6 7.8 ns

tENHZ Enable-to-Pad, H to Z 2.5 2.9 3.3 3.9 5.4 ns

dTLH2Delta Low to High 0.014 0.017 0.017 0.023 0.031 ns/pF

dTHL2Delta High to Low 0.023 0.029 0.031 0.037 0.051 ns/pF

dTHLS2Delta High to Low—low slew 0.043 0.046 0.057 0.066 0.089 ns/pF

Notes:

1. Delays based on 50 pF loading.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

2-34 v5.1

Table 2-28 • A54SX32A Timing Characteristics

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

C-Cell Propagation Delays1

tPD Internal Array Module 0.8 0.9 1.1 1.2 1.7 ns

Predicted Routing Delays2

tDC FO = 1 Routing Delay, Direct

Connect

0.1 0.1 0.1 0.1 0.1 ns

tFC FO = 1 Routing Delay, Fast Connect 0.3 0.3 0.3 0.4 0.6 ns

tRD1 FO = 1 Routing Delay 0.3 0.3 0.4 0.5 0.6 ns

tRD2 FO = 2 Routing Delay 0.4 0.5 0.5 0.6 0.8 ns

tRD3 FO = 3 Routing Delay 0.5 0.6 0.7 0.8 1.1 ns

tRD4 FO = 4 Routing Delay 0.7 0.8 0.9 1.0 1.4 ns

tRD8 FO = 8 Routing Delay 1.2 1.4 1.5 1.8 2.5 ns

tRD12 FO = 12 Routing Delay 1.7 2.0 2.2 2.6 3.6 ns

R-Cell Timing

tRCO Sequential Clock-to-Q 0.6 0.7 0.8 0.9 1.3 ns

tCLR Asynchronous Clear-to-Q 0.5 0.6 0.6 0.8 1.0 ns

tPRESET Asynchronous Preset-to-Q 0.6 0.7 0.7 0.9 1.2 ns

tSUD Flip-Flop Data Input Set-Up 0.6 0.7 0.8 0.9 1.2 ns

tHD Flip-Flop Data Input Hold 0.0 0.0 0.0 0.0 0.0 ns

tWASYN Asynchronous Pulse Width 1.2 1.4 1.5 1.8 2.5 ns

tRECASYN Asynchronous Recovery Time 0.3 0.4 0.4 0.5 0.7 ns

tHASYN Asynchronous Removal Time 0.3 0.3 0.3 0.4 0.6 ns

tMPW Clock Pulse Width 1.4 1.6 1.8 2.1 2.9 ns

Input Module Propagation Delays

tINYH Input Data Pad to Y High 2.5 V

LVCMOS

0.6 0.7 0.8 0.9 1.2 ns

tINYL Input Data Pad to Y Low 2.5 V

LVCMOS

1.2 1.3 1.5 1.8 2.5 ns

tINYH Input Data Pad to Y High 3.3 V PCI 0.5 0.6 0.6 0.7 1.0 ns

tINYL Input Data Pad to Y Low 3.3 V PCI 0.6 0.7 0.8 0.9 1.3 ns

tINYH Input Data Pad to Y High 3.3 V

LVTTL

0.8 0.9 1.0 1.2 1.6 ns

tINYL Input Data Pad to Y Low 3.3 V LVTTL 1.4 1.6 1.8 2.2 3.0 ns

tINYH Input Data Pad to Y High 5 V PCI 0.7 0.8 0.9 1.0 1.4 ns

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

v5.1 2-35

tINYL Input Data Pad to Y Low 5 V PCI 0.9 1.1 1.2 1.4 1.9 ns

tINYH Input Data Pad to Y High 5 V TTL 0.9 1.1 1.2 1.4 1.9 ns

tINYL Input Data Pad to Y Low 5 V TTL 1.4 1.6 1.8 2.1 2.9 ns

Input Module Predicted Routing Delays2

tIRD1 FO = 1 Routing Delay 0.3 0.3 0.3 0.4 0.6 ns

tIRD2 FO = 2 Routing Delay 0.4 0.5 0.5 0.6 0.8 ns

tIRD3 FO = 3 Routing Delay 0.5 0.6 0.7 0.8 1.1 ns

tIRD4 FO = 4 Routing Delay 0.7 0.8 0.9 1 1.4 ns

tIRD8 FO = 8 Routing Delay 1.2 1.4 1.5 1.8 2.5 ns

tIRD12 FO = 12 Routing Delay 1.7 2 2.2 2.6 3.6 ns

Table 2-28 • A54SX32A Timing Characteristics (Continued)

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

2-36 v5.1

Table 2-29 • A54SX32A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.25 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.7 2.0 2.2 2.6 4.0 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.7 2.0 2.2 2.6 4.0 ns

tHPWH Minimum Pulse Width High 1.4 1.6 1.8 2.1 2.9 ns

tHPWL Minimum Pulse Width Low 1.4 1.6 1.8 2.1 2.9 ns

tHCKSW Maximum Skew 0.6 0.6 0.7 0.8 1.3 ns

tHP Minimum Period 2.8 3.2 3.6 4.2 5.8 ns

fHMAX Maximum Frequency 357 313 278 238 172 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

2.2 2.5 2.9 3.4 4.7 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

2.1 2.4 2.7 3.2 4.4 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

2.4 2.7 3.1 3.6 5.1 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

2.2 2.5 2.8 3.3 4.6 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

2.5 2.9 3.2 3.8 5.3 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

2.4 2.7 3.1 3.6 5.0 ns

tRPWH Minimum Pulse Width High 1.4 1.6 1.8 2.1 2.9 ns

tRPWL Minimum Pulse Width Low 1.4 1.6 1.8 2.1 2.9 ns

tRCKSW Maximum Skew (Light Load) 1.0 1.1 1.3 1.5 2.1 ns

tRCKSW Maximum Skew (50% Load) 0.9 1.0 1.2 1.4 1.9 ns

tRCKSW Maximum Skew (100% Load) 0.9 1.0 1.2 1.4 1.9 ns

SX-A Family FPGAs

v5.1 2-37

Table 2-30 • A54SX32A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.7 2.0 2.2 2.6 4.0 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.7 2.0 2.2 2.6 4.0 ns

tHPWH Minimum Pulse Width High 1.4 1.6 1.8 2.1 2.9 ns

tHPWL Minimum Pulse Width Low 1.4 1.6 1.8 2.1 2.9 ns

tHCKSW Maximum Skew 0.6 0.6 0.7 0.8 1.3 ns

tHP Minimum Period 2.8 3.2 3.6 4.2 5.8 ns

fHMAX Maximum Frequency 357 313 278 238 172 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

2.2 2.5 2.8 3.3 4.6 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

2.1 2.4 2.7 3.2 4.5 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

2.3 2.7 3.1 3.6 5 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

2.2 2.5 2.9 3.4 4.7 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

2.4 2.8 3.2 3.7 5.2 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

2.4 2.8 3.1 3.7 5.1 ns

tRPWH Minimum Pulse Width High 1.4 1.6 1.8 2.1 2.9 ns

tRPWL Minimum Pulse Width Low 1.4 1.6 1.8 2.1 2.9 ns

tRCKSW Maximum Skew (Light Load) 1.0 1.1 1.3 1.5 2.1 ns

tRCKSW Maximum Skew (50% Load) 0.9 1.0 1.2 1.4 1.9 ns

tRCKSW Maximum Skew (100% Load) 0.9 1.0 1.2 1.4 1.9 ns

SX-A Family FPGAs

2-38 v5.1

Table 2-31 • A54SX32A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.7 1.9 2.2 2.6 4.0 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.7 2.0 2.2 2.6 4.0 ns

tHPWH Minimum Pulse Width High 1.4 1.6 1.8 2.1 2.9 ns

tHPWL Minimum Pulse Width Low 1.4 1.6 1.8 2.1 2.9 ns

tHCKSW Maximum Skew 0.6 0.6 0.7 0.8 1.3 ns

tHP Minimum Period 2.8 3.2 3.6 4.2 5.8 ns

fHMAX Maximum Frequency 357 313 278 238 172 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

2.2 2.5 2.8 3.3 4.7 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

2.1 2.5 2.8 3.3 4.5 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

2.4 2.7 3.1 3.6 5.1 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

2.2 2.6 2.9 3.4 4.7 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

2.5 2.8 3.2 3.8 5.3 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

2.4 2.8 3.1 3.7 5.2 ns

tRPWH Minimum Pulse Width High 1.4 1.6 1.8 2.1 2.9 ns

tRPWL Minimum Pulse Width Low 1.4 1.6 1.8 2.1 2.9 ns

tRCKSW Maximum Skew (Light Load) 1.0 1.1 1.3 1.5 2.1 ns

tRCKSW Maximum Skew (50% Load) 1.0 1.1 1.3 1.5 2.1 ns

tRCKSW Maximum Skew (100% Load) 1.0 1.1 1.3 1.5 2.1 ns

SX-A Family FPGAs

v5.1 2-39

Table 2-32 • A54SX32A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.3V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

2.5 V LVCMOS Output Module Timing 1,2

tDLH Data-to-Pad Low to High 3.3 3.8 4.2 5.0 7.0 ns

tDHL Data-to-Pad High to Low 2.5 2.9 3.2 3.8 5.3 ns

tDHLS Data-to-Pad High to Low—low slew 11.1 12.8 14.5 17.0 23.8 ns

tENZL Enable-to-Pad, Z to L 2.4 2.8 3.2 3.7 5.2 ns

tENZLS Data-to-Pad, Z to L—low slew 11.8 13.7 15.5 18.2 25.5 ns

tENZH Enable-to-Pad, Z to H 3.3 3.8 4.2 5.0 7.0 ns

tENLZ Enable-to-Pad, L to Z 2.1 2.5 2.8 3.3 4.7 ns

tENHZ Enable-to-Pad, H to Z 2.5 2.9 3.2 3.8 5.3 ns

dTLH3Delta Low to High 0.031 0.037 0.043 0.051 0.071 ns/pF

dTHL3Delta High to Low 0.017 0.017 0.023 0.023 0.037 ns/pF

dTHLS3Delta High to Low—low slew 0.057 0.06 0.071 0.086 0.117 ns/pF

Note:

1. Delays based on 35 pF loading.

2. The equivalent IO Attribute settings for 2.5 V LVCMOS is 2.5 V LVTTL in the software.

3. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

SX-A Family FPGAs

2-40 v5.1

Table 2-33 • A54SX32A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

3.3 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 1.9 2.2 2.4 2.9 4.0 ns

tDHL Data-to-Pad High to Low 2.0 2.3 2.6 3.1 4.3 ns

tENZL Enable-to-Pad, Z to L 1.4 1.7 1.9 2.2 3.1 ns

tENZH Enable-to-Pad, Z to H 1.9 2.2 2.4 2.9 4.0 ns

tENLZ Enable-to-Pad, L to Z 2.5 2.8 3.2 3.8 5.3 ns

tENHZ Enable-to-Pad, H to Z 2.0 2.3 2.6 3.1 4.3 ns

dTLH2Delta Low to High 0.025 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.015 0.025 ns/pF

3.3 V LVTTL Output Module Timing3

tDLH Data-to-Pad Low to High 2.6 3.0 3.4 4.0 5.6 ns

tDHL Data-to-Pad High to Low 2.6 3.0 3.3 3.9 5.5 ns

tDHLS Data-to-Pad High to Low—low slew 9.0 10.4 11.8 13.8 19.3 ns

tENZL Enable-to-Pad, Z to L 2.2 2.6 2.9 3.4 4.8 ns

tENZLS Enable-to-Pad, Z to L—low slew 15.8 18.9 21.3 25.4 34.9 ns

tENZH Enable-to-Pad, Z to H 2.6 3.0 3.4 4.0 5.6 ns

tENLZ Enable-to-Pad, L to Z 2.9 3.3 3.7 4.4 6.2 ns

tENHZ Enable-to-Pad, H to Z 2.6 3.0 3.3 3.9 5.5 ns

dTLH2Delta Low to High 0.025 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.015 0.025 ns/pF

dTHLS2Delta High to Low—low slew 0.053 0.053 0.067 0.073 0.107 ns/pF

Notes:

1. Delays based on 10 pF loading and 25 Ω resistance.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

v5.1 2-41

Table 2-34 • A54SX32A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

5 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 2.1 2.4 2.8 3.2 4.5 ns

tDHL Data-to-Pad High to Low 2.8 3.2 3.6 4.2 5.9 ns

tENZL Enable-to-Pad, Z to L 1.3 1.5 1.7 2.0 2.8 ns

tENZH Enable-to-Pad, Z to H 2.1 2.4 2.8 3.2 4.5 ns

tENLZ Enable-to-Pad, L to Z 3.0 3.5 3.9 4.6 6.4 ns

tENHZ Enable-to-Pad, H to Z 2.8 3.2 3.6 4.2 5.9 ns

dTLH2Delta Low to High 0.016 0.016 0.02 0.022 0.032 ns/pF

dTHL2Delta High to Low 0.026 0.03 0.032 0.04 0.052 ns/pF

5 V TTL Output Module Timing3

tDLH Data-to-Pad Low to High 1.9 2.2 2.5 2.9 4.1 ns

tDHL Data-to-Pad High to Low 2.5 2.9 3.3 3.9 5.4 ns

tDHLS Data-to-Pad High to Low—low slew 6.6 7.6 8.6 10.1 14.2 ns

tENZL Enable-to-Pad, Z to L 2.1 2.4 2.7 3.2 4.5 ns

tENZLS Enable-to-Pad, Z to L—low slew 7.4 8.4 9.5 11.0 15.4 ns

tENZH Enable-to-Pad, Z to H 1.9 2.2 2.5 2.9 4.1 ns

tENLZ Enable-to-Pad, L to Z 3.6 4.2 4.7 5.6 7.8 ns

tENHZ Enable-to-Pad, H to Z 2.5 2.9 3.3 3.9 5.4 ns

dTLH2Delta Low to High 0.014 0.017 0.017 0.023 0.031 ns/pF

dTHL2Delta High to Low 0.023 0.029 0.031 0.037 0.051 ns/pF

dTHLS2Delta High to Low—low slew 0.043 0.046 0.057 0.066 0.089 ns/pF

Notes:

1. Delays based on 50 pF loading.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

2-42 v5.1

Table 2-35 • A54SX72A Timing Characteristics

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

C-Cell Propagation Delays1

tPD Internal Array Module 1.0 1.1 1.3 1.5 2.0 ns

Predicted Routing Delays2

tDC FO = 1 Routing Delay, Direct

Connect

0.1 0.1 0.1 0.1 0.1 ns

tFC FO = 1 Routing Delay, Fast Connect 0.3 0.3 0.3 0.4 0.6 ns

tRD1 FO = 1 Routing Delay 0.3 0.3 0.4 0.5 0.7 ns

tRD2 FO = 2 Routing Delay 0.4 0.5 0.6 0.7 1 ns

tRD3 FO = 3 Routing Delay 0.5 0.7 0.8 0.9 1.3 ns

tRD4 FO = 4 Routing Delay 0.7 0.9 1 1.1 1.5 ns

tRD8 FO = 8 Routing Delay 1.2 1.5 1.7 2.1 2.9 ns

tRD12 FO = 12 Routing Delay 1.7 2.2 2.5 3 4.2 ns

R-Cell Timing

tRCO Sequential Clock-to-Q 0.7 0.8 0.9 1.1 1.5 ns

tCLR Asynchronous Clear-to-Q 0.6 0.7 0.7 0.9 1.2 ns

tPRESET Asynchronous Preset-to-Q 0.7 0.8 0.8 1.0 1.4 ns

tSUD Flip-Flop Data Input Set-Up 0.7 0.8 0.9 1.0 1.4 ns

tHD Flip-Flop Data Input Hold 0.0 0.0 0.0 0.0 0.0 ns

tWASYN Asynchronous Pulse Width 1.3 1.5 1.7 2.0 2.8 ns

tRECASYN Asynchronous Recovery Time 0.3 0.4 0.4 0.5 0.7 ns

tHASYN Asynchronous Hold Time 0.3 0.3 0.3 0.4 0.6 ns

tMPW Clock Minimum Pulse Width 1.5 1.7 2.0 2.3 3.2 ns

Input Module Propagation Delays

tINYH Input Data Pad to Y High 2.5 V

LVCMOS

0.6 0.7 0.8 0.9 1.3 ns

tINYL Input Data Pad to Y Low 2.5 V

LVCMOS

0.8 1.0 1.1 1.3 1.7 ns

tINYH Input Data Pad to Y High 3.3 V PCI 0.6 0.7 0.7 0.9 1.2 ns

tINYL Input Data Pad to Y Low 3.3 V PCI 0.7 0.8 0.9 1.0 1.4 ns

tINYH Input Data Pad to Y High 3.3 V

LVTTL

0.7 0.7 0.8 1.0 1.4 ns

tINYL Input Data Pad to Y Low 3.3 V LVTTL 1.0 1.2 1.3 1.5 2.1 ns

tINYH Input Data Pad to Y High 5 V PCI 0.5 0.6 0.7 0.8 1.1 ns

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

v5.1 2-43

tINYL Input Data Pad to Y Low 5 V PCI 0.8 0.9 1.0 1.2 1.6 ns

tINYH Input Data Pad to Y High 5 V TTL 0.7 0.8 0.9 1.0 1.4 ns

tINYL Input Data Pad to Y Low 5 V TTL 0.9 1.1 1.2 1.4 1.9 ns

Input Module Predicted Routing Delays2

tIRD1 FO = 1 Routing Delay 0.3 0.3 0.4 0.5 0.7 ns

tIRD2 FO = 2 Routing Delay 0.4 0.5 0.6 0.7 1 ns

tIRD3 FO = 3 Routing Delay 0.5 0.7 0.8 0.9 1.3 ns

tIRD4 FO = 4 Routing Delay 0.7 0.9 1 1.1 1.5 ns

tIRD8 FO = 8 Routing Delay 1.2 1.5 1.7 2.1 2.9 ns

tIRD12 FO = 12 Routing Delay 1.7 2.2 2.5 3 4.2 ns

Table 2-35 • A54SX72A Timing Characteristics (Continued)

(Worst-Case Commercial Conditions, VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Notes:

1. For dual-module macros, use tPD + tRD1 + tPDn , tRCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.

2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device

performance. Post-route timing analysis or simulation is required to determine actual performance.

SX-A Family FPGAs

2-44 v5.1

Table 2-36 • A54SX72A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.25 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.6 1.9 2.1 2.5 3.8 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.6 1.9 2.1 2.5 3.8 ns

tHPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tHPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tHCKSW Maximum Skew 1.4 1.6 1.8 2.1 3.3 ns

tHP Minimum Period 3.0 3.4 4.0 4.6 6.4 ns

fHMAX Maximum Frequency 333 294 250 217 156 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

2.3 2.6 2.9 3.4 4.8 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

2.8 3.2 3.7 4.3 6.0 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

2.4 2.8 3.2 3.7 5.2 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

2.9 3.3 3.8 4.5 6.2 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

2.6 3.0 3.4 4.0 5.6 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

3.1 3.6 4.0 4.7 6.6 ns

tRPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tRPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tRCKSW Maximum Skew (Light Load) 1.9 2.2 2.5 3.0 4.1 ns

tRCKSW Maximum Skew (50% Load) 1.8 2.1 2.4 2.8 3.9 ns

tRCKSW Maximum Skew (100% Load) 1.8 2.1 2.4 2.8 3.9 ns

Quadrant Array Clock Networks

tQCKH Input Low to High (Light Load)

(Pad to R-cell Input)

2.6 3.0 3.4 4.0 5.6 ns

tQCHKL Input High to Low (Light Load)

(Pad to R-cell Input)

2.6 3.0 3.3 3.9 5.5 ns

tQCKH Input Low to High (50% Load)

(Pad to R-cell Input)

2.8 3.2 3.6 4.3 6.0 ns

tQCHKL Input High to Low (50% Load)

(Pad to R-cell Input)

2.8 3.2 3.6 4.2 5.9 ns

tQCKH Input Low to High (100% Load)

(Pad to R-cell Input)

3.0 3.4 3.9 4.6 6.4 ns

SX-A Family FPGAs

v5.1 2-45

tQCHKL Input High to Low (100% Load)

(Pad to R-cell Input)

2.9 3.4 3.8 4.5 6.3 ns

tQPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tQPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tQCKSW Maximum Skew (Light Load) 0.2 0.3 0.3 0.3 0.5 ns

tQCKSW Maximum Skew (50% Load) 0.4 0.5 0.5 0.6 0.9 ns

tQCKSW Maximum Skew (100% Load) 0.4 0.5 0.5 0.6 0.9 ns

Table 2-36 • A54SX72A Timing Characteristics (Continued)

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.25 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

SX-A Family FPGAs

2-46 v5.1

Table 2-37 • A54SX72A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.6 1.9 2.1 2.5 3.8 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.7 1.9 2.1 2.5 3.8 ns

tHPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tHPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tHCKSW Maximum Skew 1.4 1.6 1.8 2.1 3.3 ns

tHP Minimum Period 3.0 3.4 4.0 4.6 6.4 ns

fHMAX Maximum Frequency 333 294 250 217 156 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

2.2 2.6 2.9 3.4 4.8 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

2.8 3.3 3.7 4.3 6.0 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

2.4 2.8 3.2 3.7 5.2 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

2.9 3.4 3.8 4.5 6.2 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

2.6 3.0 3.4 4.0 5.6 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

3.1 3.6 4.1 4.8 6.7 ns

tRPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tRPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tRCKSW Maximum Skew (Light Load) 1.9 2.2 2.5 3 4.1 ns

tRCKSW Maximum Skew (50% Load) 1.9 2.1 2.4 2.8 3.9 ns

tRCKSW Maximum Skew (100% Load) 1.9 2.1 2.4 2.8 3.9 ns

Quadrant Array Clock Networks

tQCKH Input Low to High (Light Load)

(Pad to R-cell Input)

1.3 1.5 1.7 1.9 2.7 ns

tQCHKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.3 1.5 1.7 2 2.8 ns

tQCKH Input Low to High (50% Load)

(Pad to R-cell Input)

1.5 1.7 1.9 2.2 3.1 ns

tQCHKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.5 1.8 2 2.3 3.2 ns

tQCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.7 1.9 2.2 2.5 3.5 ns

SX-A Family FPGAs

v5.1 2-47

tQCHKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.7 2 2.2 2.6 3.6 ns

tQPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tQPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tQCKSW Maximum Skew (Light Load) 0.2 0.3 0.3 0.3 0.5 ns

tQCKSW Maximum Skew (50% Load) 0.4 0.5 0.5 0.6 0.9 ns

tQCKSW Maximum Skew (100% Load) 0.4 0.5 0.5 0.6 0.9 ns

Table 2-37 • A54SX72A Timing Characteristics (Continued)

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

SX-A Family FPGAs

2-48 v5.1

Table 2-38 • A54SX72A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

Dedicated (Hardwired) Array Clock Networks

tHCKH Input Low to High

(Pad to R-cell Input)

1.6 1.8 2.1 2.4 3.8 ns

tHCKL Input High to Low

(Pad to R-cell Input)

1.6 1.9 2.1 2.5 3.8 ns

tHPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tHPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tHCKSW Maximum Skew 1.4 1.6 1.8 2.1 3.3 ns

tHP Minimum Period 3.0 3.4 4.0 4.6 6.4 ns

fHMAX Maximum Frequency 333 294 250 217 156 MHz

Routed Array Clock Networks

tRCKH Input Low to High (Light Load)

(Pad to R-cell Input)

2.3 2.6 3.0 3.5 4.9 ns

tRCKL Input High to Low (Light Load)

(Pad to R-cell Input)

2.8 3.2 3.6 4.3 6.0 ns

tRCKH Input Low to High (50% Load)

(Pad to R-cell Input)

2.5 2.9 3.2 3.8 5.3 ns

tRCKL Input High to Low (50% Load)

(Pad to R-cell Input)

3.0 3.4 3.9 4.6 6.4 ns

tRCKH Input Low to High (100% Load)

(Pad to R-cell Input)

2.6 3.0 3.4 3.9 5.5 ns

tRCKL Input High to Low (100% Load)

(Pad to R-cell Input)

3.2 3.6 4.1 4.8 6.8 ns

tRPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tRPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tRCKSW Maximum Skew (Light Load) 1.9 2.2 2.5 3.0 4.1 ns

tRCKSW Maximum Skew (50% Load) 1.9 2.2 2.5 3.0 4.1 ns

tRCKSW Maximum Skew (100% Load) 1.9 2.2 2.5 3.0 4.1 ns

Quadrant Array Clock Networks

tQCKH Input Low to High (Light Load)

(Pad to R-cell Input)

1.2 1.4 1.6 1.8 2.6 ns

tQCHKL Input High to Low (Light Load)

(Pad to R-cell Input)

1.3 1.4 1.6 1.9 2.7 ns

tQCKH Input Low to High (50% Load)

(Pad to R-cell Input)

1.4 1.6 1.8 2.1 3.0 ns

tQCHKL Input High to Low (50% Load)

(Pad to R-cell Input)

1.4 1.7 1.9 2.2 3.1 ns

tQCKH Input Low to High (100% Load)

(Pad to R-cell Input)

1.6 1.8 2.1 2.4 3.4 ns

SX-A Family FPGAs

v5.1 2-49

tQCHKL Input High to Low (100% Load)

(Pad to R-cell Input)

1.6 1.9 2.1 2.5 3.5 ns

tQPWH Minimum Pulse Width High 1.5 1.7 2.0 2.3 3.2 ns

tQPWL Minimum Pulse Width Low 1.5 1.7 2.0 2.3 3.2 ns

tQCKSW Maximum Skew (Light Load) 0.2 0.3 0.3 0.3 0.5 ns

tQCKSW Maximum Skew (50% Load) 0.4 0.5 0.5 0.6 0.9 ns

tQCKSW Maximum Skew (100% Load) 0.4 0.5 0.5 0.6 0.9 ns

Table 2-38 • A54SX72A Timing Characteristics (Continued)

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

SX-A Family FPGAs

2-50 v5.1

Table 2-39 • A54SX72A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 2.3V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

2.5 V LVCMOS Output Module Timing1, 2

tDLH Data-to-Pad Low to High 3.9 4.5 5.1 6.0 8.4 ns

tDHL Data-to-Pad High to Low 3.1 3.6 4.1 4.8 6.7 ns

tDHLS Data-to-Pad High to Low—low slew 12.7 14.6 16.5 19.4 27.2 ns

tENZL Enable-to-Pad, Z to L 2.4 2.8 3.2 3.7 5.2 ns

tENZLS Data-to-Pad, Z to L—low slew 11.8 13.7 15.5 18.2 25.5 ns

tENZH Enable-to-Pad, Z to H 3.9 4.5 5.1 6.0 8.4 ns

tENLZ Enable-to-Pad, L to Z 2.1 2.5 2.8 3.3 4.7 ns

tENHZ Enable-to-Pad, H to Z 3.1 3.6 4.1 4.8 6.7 ns

dTLH3Delta Low to High 0.031 0.037 0.043 0.051 0.071 ns/pF

dTHL3Delta High to Low 0.017 0.017 0.023 0.023 0.037 ns/pF

dTHLS3Delta High to Low—low slew 0.057 0.06 0.071 0.086 0.117 ns/pF

Note:

1. Delays based on 35 pF loading.

2. The equivalent IO Attribute settings for 2.5 V LVCMOS is 2.5 V LVTTL in the software.

3. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

SX-A Family FPGAs

v5.1 2-51

Table 2-40 • A54SX72A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 3.0 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

3.3 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 2.3 2.7 3.0 3.6 5.0 ns

tDHL Data-to-Pad High to Low 2.5 2.9 3.2 3.8 5.3 ns

tENZL Enable-to-Pad, Z to L 1.4 1.7 1.9 2.2 3.1 ns

tENZH Enable-to-Pad, Z to H 2.3 2.7 3.0 3.6 5.0 ns

tENLZ Enable-to-Pad, L to Z 2.5 2.8 3.2 3.8 5.3 ns

tENHZ Enable-to-Pad, H to Z 2.5 2.9 3.2 3.8 5.3 ns

dTLH2Delta Low to High 0.025 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.015 0.025 ns/pF

3.3 V LVTTL Output Module Timing3

tDLH Data-to-Pad Low to High 3.2 3.7 4.2 5.0 6.9 ns

tDHL Data-to-Pad High to Low 3.2 3.7 4.2 4.9 6.9 ns

tDHLS Data-to-Pad High to Low—low slew 10.3 11.9 13.5 15.8 22.2 ns

tENZL Enable-to-Pad, Z to L 2.2 2.6 2.9 3.4 4.8 ns

tENZLS Enable-to-Pad, Z to L—low slew 15.8 18.9 21.3 25.4 34.9 ns

tENZH Enable-to-Pad, Z to H 3.2 3.7 4.2 5.0 6.9 ns

tENLZ Enable-to-Pad, L to Z 2.9 3.3 3.7 4.4 6.2 ns

tENHZ Enable-to-Pad, H to Z 3.2 3.7 4.2 4.9 6.9 ns

dTLH2Delta Low to High 0.025 0.03 0.03 0.04 0.045 ns/pF

dTHL2Delta High to Low 0.015 0.015 0.015 0.015 0.025 ns/pF

dTHLS2Delta High to Low—low slew 0.053 0.053 0.067 0.073 0.107 ns/pF

Notes:

1. Delays based on 10 pF loading and 25 Ω resistance.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

2-52 v5.1

Table 2-41 • A54SX72A Timing Characteristics

(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70°C)

Parameter Description

–3 Speed –2 Speed –1 Speed Std. Speed –F Speed

UnitsMin. Max. Min. Max. Min. Max. Min. Max. Min. Max.

5 V PCI Output Module Timing1

tDLH Data-to-Pad Low to High 2.7 3.1 3.5 4.1 5.7 ns

tDHL Data-to-Pad High to Low 3.4 3.9 4.4 5.1 7.2 ns

tENZL Enable-to-Pad, Z to L 1.3 1.5 1.7 2.0 2.8 ns

tENZH Enable-to-Pad, Z to H 2.7 3.1 3.5 4.1 5.7 ns

tENLZ Enable-to-Pad, L to Z 3.0 3.5 3.9 4.6 6.4 ns

tENHZ Enable-to-Pad, H to Z 3.4 3.9 4.4 5.1 7.2 ns

dTLH2Delta Low to High 0.016 0.016 0.02 0.022 0.032 ns/pF

dTHL2Delta High to Low 0.026 0.03 0.032 0.04 0.052 ns/pF

5 V TTL Output Module Timing3

tDLH Data-to-Pad Low to High 2.4 2.8 3.1 3.7 5.1 ns

tDHL Data-to-Pad High to Low 3.1 3.5 4.0 4.7 6.6 ns

tDHLS Data-to-Pad High to Low—low slew 7.4 8.5 9.7 11.4 15.9 ns

tENZL Enable-to-Pad, Z to L 2.1 2.4 2.7 3.2 4.5 ns

tENZLS Enable-to-Pad, Z to L—low slew 7.4 8.4 9.5 11.0 15.4 ns

tENZH Enable-to-Pad, Z to H 2.4 2.8 3.1 3.7 5.1 ns

tENLZ Enable-to-Pad, L to Z 3.6 4.2 4.7 5.6 7.8 ns

tENHZ Enable-to-Pad, H to Z 3.1 3.5 4.0 4.7 6.6 ns

dTLH2Delta Low to High 0.014 0.017 0.017 0.023 0.031 ns/pF

dTHL2Delta High to Low 0.023 0.029 0.031 0.037 0.051 ns/pF

dTHLS2Delta High to Low—low slew 0.043 0.046 0.057 0.066 0.089 ns/pF

Notes:

1. Delays based on 50 pF loading.

2. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:

Slew Rate [V/ns] = (0.1*VCCI – 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])

where Cload is the load capacitance driven by the I/O in pF

dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.

3. Delays based on 35 pF loading.

SX-A Family FPGAs

v5.1 3-1

Package Pin Assignments

208-Pin PQFP

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-1 • 208-Pin PQFP (Top View)

208-Pin

PQFP

1208

SX-A Family FPGAs

3-2 v5.1

208-Pin PQFP

Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

1 GND GND GND GND

2 TDI, I/O TDI, I/O TDI, I/O TDI, I/O

3 I/O I/O I/O I/O

4 NC I/O I/O I/O

5 I/O I/O I/O I/O

6 NC I/O I/O I/O

7 I/O I/O I/O I/O

8 I/O I/O I/O I/O

9 I/O I/O I/O I/O

10 I/O I/O I/O I/O

11 TMS TMS TMS TMS

12 VCCI VCCI VCCI VCCI

13 I/O I/O I/O I/O

14 NC I/O I/O I/O

15 I/O I/O I/O I/O

16 I/O I/O I/O I/O

17 NC I/O I/O I/O

18 I/O I/O I/O GND

19 I/O I/O I/O VCCA

20 NC I/O I/O I/O

21 I/O I/O I/O I/O

22 I/O I/O I/O I/O

23 NC I/O I/O I/O

24 I/O I/O I/O I/O

25 NC NC NC I/O

26 GND GND GND GND

27 VCCA VCCA VCCA VCCA

28 GND GND GND GND

29 I/O I/O I/O I/O

30 TRST, I/O TRST, I/O TRST, I/O TRST, I/O

31 NC I/O I/O I/O

32 I/O I/O I/O I/O

33 I/O I/O I/O I/O

34 I/O I/O I/O I/O

35 NC I/O I/O I/O

36 I/O I/O I/O I/O

37 I/O I/O I/O I/O

38 I/O I/O I/O I/O

39 NC I/O I/O I/O

40 VCCI VCCI VCCI VCCI

41 VCCA VCCA VCCA VCCA

42 I/O I/O I/O I/O

43 I/O I/O I/O I/O

44 I/O I/O I/O I/O

45 I/O I/O I/O I/O

46 I/O I/O I/O I/O

47 I/O I/O I/O I/O

48 NC I/O I/O I/O

49 I/O I/O I/O I/O

50 NC I/O I/O I/O

51 I/O I/O I/O I/O

52 GND GND GND GND

53 I/O I/O I/O I/O

54 I/O I/O I/O I/O

55 I/O I/O I/O I/O

56 I/O I/O I/O I/O

57 I/O I/O I/O I/O

58 I/O I/O I/O I/O

59 I/O I/O I/O I/O

60 VCCI VCCI VCCI VCCI

61 NC I/O I/O I/O

62 I/O I/O I/O I/O

63 I/O I/O I/O I/O

64 NC I/O I/O I/O

65 I/O I/O NC I/O

66 I/O I/O I/O I/O

67 NC I/O I/O I/O

68 I/O I/O I/O I/O

69 I/O I/O I/O I/O

70 NC I/O I/O I/O

208-Pin PQFP

Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

SX-A Family FPGAs

v5.1 3-3

71 I/O I/O I/O I/O

72 I/O I/O I/O I/O

73 NC I/O I/O I/O

74 I/O I/O I/O QCLKA

75 NC I/O I/O I/O

76 PRB, I/O PRB, I/O PRB, I/O PRB,I/O

77 GND GND GND GND

78 VCCA VCCA VCCA VCCA

79 GND GND GND GND

80 NC NC NC NC

81 I/O I/O I/O I/O

82 HCLK HCLK HCLK HCLK

83 I/O I/O I/O VCCI

84 I/O I/O I/O QCLKB

85 NC I/O I/O I/O

86 I/O I/O I/O I/O

87 I/O I/O I/O I/O

88 NC I/O I/O I/O

89 I/O I/O I/O I/O

90 I/O I/O I/O I/O

91 NC I/O I/O I/O

92 I/O I/O I/O I/O

93 I/O I/O I/O I/O

94 NC I/O I/O I/O

95 I/O I/O I/O I/O

96 I/O I/O I/O I/O

97 NC I/O I/O I/O

98 VCCI VCCI VCCI VCCI

99 I/O I/O I/O I/O

100 I/O I/O I/O I/O

101 I/O I/O I/O I/O

102 I/O I/O I/O I/O

103 TDO, I/OTDO, I/OTDO, I/OTDO, I/O

104 I/O I/O I/O I/O

105 GND GND GND GND

208-Pin PQFP

Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

106 NC I/O I/O I/O

107 I/O I/O I/O I/O

108 NC I/O I/O I/O

109 I/O I/O I/O I/O

110 I/O I/O I/O I/O

111 I/O I/O I/O I/O

112 I/O I/O I/O I/O

113 I/O I/O I/O I/O

114 VCCA VCCA VCCA VCCA

115 VCCI VCCI VCCI VCCI

116 NC I/O I/O GND

117 I/O I/O I/O VCCA

118 I/O I/O I/O I/O

119 NC I/O I/O I/O

120 I/O I/O I/O I/O

121 I/O I/O I/O I/O

122 NC I/O I/O I/O

123 I/O I/O I/O I/O

124 I/O I/O I/O I/O

125 NC I/O I/O I/O

126 I/O I/O I/O I/O

127 I/O I/O I/O I/O

128 I/O I/O I/O I/O

129 GND GND GND GND

130 VCCA VCCA VCCA VCCA

131 GND GND GND GND

132NCNCNCI/O

133 I/O I/O I/O I/O

134 I/O I/O I/O I/O

135 NC I/O I/O I/O

136 I/O I/O I/O I/O

137 I/O I/O I/O I/O

138 NC I/O I/O I/O

139 I/O I/O I/O I/O

140 I/O I/O I/O I/O

208-Pin PQFP

Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

SX-A Family FPGAs

3-4 v5.1

141 NC I/O I/O I/O

142 I/O I/O I/O I/O

143 NC I/O I/O I/O

144 I/O I/O I/O I/O

145 VCCA VCCA VCCA VCCA

146 GND GND GND GND

147 I/O I/O I/O I/O

148 VCCI VCCI VCCI VCCI

149 I/O I/O I/O I/O

150 I/O I/O I/O I/O

151 I/O I/O I/O I/O

152 I/O I/O I/O I/O

153 I/O I/O I/O I/O

154 I/O I/O I/O I/O

155 NC I/O I/O I/O

156 NC I/O I/O I/O

157 GND GND GND GND

158 I/O I/O I/O I/O

159 I/O I/O I/O I/O

160 I/O I/O I/O I/O

161 I/O I/O I/O I/O

162 I/O I/O I/O I/O

163 I/O I/O I/O I/O

164 VCCI VCCI VCCI VCCI

165 I/O I/O I/O I/O

166 I/O I/O I/O I/O

167 NC I/O I/O I/O

168 I/O I/O I/O I/O

169 I/O I/O I/O I/O

170 NC I/O I/O I/O

171 I/O I/O I/O I/O

172 I/O I/O I/O I/O

173 NC I/O I/O I/O

174 I/O I/O I/O I/O

175 I/O I/O I/O I/O

208-Pin PQFP

Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

176 NC I/O I/O I/O

177 I/O I/O I/O I/O

178 I/O I/O I/O QCLKD

179 I/O I/O I/O I/O

180 CLKA CLKA CLKA CLKA

181 CLKB CLKB CLKB CLKB

182NCNCNCNC

183 GND GND GND GND

184 VCCA VCCA VCCA VCCA

185 GND GND GND GND

186 PRA, I/O PRA, I/O PRA, I/O PRA, I/O

187 I/O I/O I/O VCCI

188 I/O I/O I/O I/O

189 NC I/O I/O I/O

190 I/O I/O I/O QCLKC

191 I/O I/O I/O I/O

192 NC I/O I/O I/O

193 I/O I/O I/O I/O

194 I/O I/O I/O I/O

195 NC I/O I/O I/O

196 I/O I/O I/O I/O

197 I/O I/O I/O I/O

198 NC I/O I/O I/O

199 I/O I/O I/O I/O

200 I/O I/O I/O I/O

201 VCCI VCCI VCCI VCCI

202 NC I/O I/O I/O

203 NC I/O I/O I/O

204 I/O I/O I/O I/O

205 NC I/O I/O I/O

206 I/O I/O I/O I/O

207 I/O I/O I/O I/O

208 TCK, I/O TCK, I/O TCK, I/O TCK, I/O

208-Pin PQFP

Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

SX-A Family FPGAs

v5.1 3-5

100-Pin TQFP

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-2 • 100-Pin TQFP

100-Pin

TQFP

100

SX-A Family FPGAs

3-6 v5.1

100-TQFP

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

1 GND GND GND

2 TDI, I/O TDI, I/O TDI, I/O

3I/OI/OI/O

4I/OI/OI/O

5I/OI/OI/O

6I/OI/OI/O

7 TMS TMS TMS

CCI VCCI VCCI

9 GND GND GND

10 I/O I/O I/O

11 I/O I/O I/O

12 I/O I/O I/O

13 I/O I/O I/O

14 I/O I/O I/O

15 I/O I/O I/O

16 TRST, I/O TRST, I/O TRST, I/O

17 I/O I/O I/O

18 I/O I/O I/O

19 I/O I/O I/O

20 VCCI VCCI VCCI

21 I/O I/O I/O

22 I/O I/O I/O

23 I/O I/O I/O

24 I/O I/O I/O

25 I/O I/O I/O

26 I/O I/O I/O

27 I/O I/O I/O

28 I/O I/O I/O

29 I/O I/O I/O

30 I/O I/O I/O

31 I/O I/O I/O

32 I/O I/O I/O

33 I/O I/O I/O

34 PRB, I/O PRB, I/O PRB, I/O

35 VCCA VCCA VCCA

36 GND GND GND

37 NC NC NC

38 I/O I/O I/O

39 HCLK HCLK HCLK

40 I/O I/O I/O

41 I/O I/O I/O

42 I/O I/O I/O

43 I/O I/O I/O

44 VCCI VCCI VCCI

45 I/O I/O I/O

46 I/O I/O I/O

47 I/O I/O I/O

48 I/O I/O I/O

49 TDO, I/O TDO, I/O TDO, I/O

50 I/O I/O I/O

51 GND GND GND

52 I/O I/O I/O

53 I/O I/O I/O

54 I/O I/O I/O

55 I/O I/O I/O

56 I/O I/O I/O

57 VCCA VCCA VCCA

58 VCCI VCCI VCCI

59 I/O I/O I/O

60 I/O I/O I/O

61 I/O I/O I/O

62 I/O I/O I/O

63 I/O I/O I/O

64 I/O I/O I/O

65 I/O I/O I/O

66 I/O I/O I/O

67 VCCA VCCA VCCA

68 GND GND GND

69 GND GND GND

70 I/O I/O I/O

100-TQFP

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

SX-A Family FPGAs

v5.1 3-7

71 I/O I/O I/O

72 I/O I/O I/O

73 I/O I/O I/O

74 I/O I/O I/O

75 I/O I/O I/O

76 I/O I/O I/O

77 I/O I/O I/O

78 I/O I/O I/O

79 I/O I/O I/O

80 I/O I/O I/O

81 I/O I/O I/O

82 VCCI VCCI VCCI

83 I/O I/O I/O

84 I/O I/O I/O

85 I/O I/O I/O

86 I/O I/O I/O

87 CLKA CLKA CLKA

88 CLKB CLKB CLKB

89 NC NC NC

90 VCCA VCCA VCCA

91 GND GND GND

92 PRA, I/O PRA, I/O PRA, I/O

93 I/O I/O I/O

94 I/O I/O I/O

95 I/O I/O I/O

96 I/O I/O I/O

97 I/O I/O I/O

98 I/O I/O I/O

99 I/O I/O I/O

100 TCK, I/O TCK, I/O TCK, I/O

100-TQFP

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

SX-A Family FPGAs

3-8 v5.1

144-Pin TQFP

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-3 • 144-Pin TQFP (Top View)

144

144-Pin

TQFP

SX-A Family FPGAs

v5.1 3-9

144-Pin TQFP

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

1 GND GND GND

2 TDI, I/O TDI, I/O TDI, I/O

3I/OI/OI/O

4I/OI/OI/O

5I/OI/OI/O

6I/OI/OI/O

7I/OI/OI/O

8I/OI/OI/O

9 TMS TMS TMS

10 VCCI VCCI VCCI

11 GND GND GND

12 I/O I/O I/O

13 I/O I/O I/O

14 I/O I/O I/O

15 I/O I/O I/O

16 I/O I/O I/O

17 I/O I/O I/O

18 I/O I/O I/O

19 NC NC NC

20 VCCA VCCA VCCA

21 I/O I/O I/O

22 TRST, I/O TRST, I/O TRST, I/O

23 I/O I/O I/O

24 I/O I/O I/O

25 I/O I/O I/O

26 I/O I/O I/O

27 I/O I/O I/O

28 GND GND GND

29 VCCI VCCI VCCI

30 VCCA VCCA VCCA

31 I/O I/O I/O

32 I/O I/O I/O

33 I/O I/O I/O

34 I/O I/O I/O

35 I/O I/O I/O

36 GND GND GND

37 I/O I/O I/O

38 I/O I/O I/O

39 I/O I/O I/O

40 I/O I/O I/O

41 I/O I/O I/O

42 I/O I/O I/O

43 I/O I/O I/O

44 VCCI VCCI VCCI

45 I/O I/O I/O

46 I/O I/O I/O

47 I/O I/O I/O

48 I/O I/O I/O

49 I/O I/O I/O

50 I/O I/O I/O

51 I/O I/O I/O

52 I/O I/O I/O

53 I/O I/O I/O

54 PRB, I/O PRB, I/O PRB, I/O

55 I/O I/O I/O

56 VCCA VCCA VCCA

57 GND GND GND

58 NC NC NC

59 I/O I/O I/O

60 HCLK HCLK HCLK

61 I/O I/O I/O

62 I/O I/O I/O

63 I/O I/O I/O

64 I/O I/O I/O

65 I/O I/O I/O

66 I/O I/O I/O

67 I/O I/O I/O

68 VCCI VCCI VCCI

69 I/O I/O I/O

70 I/O I/O I/O

71 TDO, I/O TDO, I/O TDO, I/O

72 I/O I/O I/O

73 GND GND GND

74 I/O I/O I/O

144-Pin TQFP

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

SX-A Family FPGAs

3-10 v5.1

75 I/O I/O I/O

76 I/O I/O I/O

77 I/O I/O I/O

78 I/O I/O I/O

79 VCCA VCCA VCCA

80 VCCI VCCI VCCI

81 GND GND GND

82 I/O I/O I/O

83 I/O I/O I/O

84 I/O I/O I/O

85 I/O I/O I/O

86 I/O I/O I/O

87 I/O I/O I/O

88 I/O I/O I/O

89 VCCA VCCA VCCA

90 NC NC NC

91 I/O I/O I/O

92 I/O I/O I/O

93 I/O I/O I/O

94 I/O I/O I/O

95 I/O I/O I/O

96 I/O I/O I/O

97 I/O I/O I/O

98 VCCA VCCA VCCA

99 GND GND GND

100 I/O I/O I/O

101 GND GND GND

102 VCCI VCCI VCCI

103 I/O I/O I/O

104 I/O I/O I/O

105 I/O I/O I/O

106 I/O I/O I/O

107 I/O I/O I/O

108 I/O I/O I/O

109 GND GND GND

110 I/O I/O I/O

144-Pin TQFP

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

111 I/O I/O I/O

112 I/O I/O I/O

113 I/O I/O I/O

114 I/O I/O I/O

115 VCCI VCCI VCCI

116 I/O I/O I/O

117 I/O I/O I/O

118 I/O I/O I/O

119 I/O I/O I/O

120 I/O I/O I/O

121 I/O I/O I/O

122 I/O I/O I/O

123 I/O I/O I/O

124 I/O I/O I/O

125 CLKA CLKA CLKA

126 CLKB CLKB CLKB

127 NC NC NC

128 GND GND GND

129 VCCA VCCA VCCA

130 I/O I/O I/O

131 PRA, I/O PRA, I/O PRA, I/O

132 I/O I/O I/O

133 I/O I/O I/O

134 I/O I/O I/O

135 I/O I/O I/O

136 I/O I/O I/O

137 I/O I/O I/O

138 I/O I/O I/O

139 I/O I/O I/O

140 VCCI VCCI VCCI

141 I/O I/O I/O

142 I/O I/O I/O

143 I/O I/O I/O

144 TCK, I/O TCK, I/O TCK, I/O

144-Pin TQFP

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

SX-A Family FPGAs

v5.1 3-11

176-Pin TQFP

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-4 • 176-Pin TQFP (Top View)

176-Pin

TQFP

176

SX-A Family FPGAs

3-12 v5.1

176-Pin TQFP

Number

A54SX32A

Function

1GND

2TDI, I/O

3I/O

4I/O

5I/O

6I/O

7I/O

8I/O

9I/O

10 TMS

11 VCCI

12 I/O

13 I/O

14 I/O

15 I/O

16 I/O

17 I/O

18 I/O

19 I/O

20 I/O

21 GND

22 VCCA

23 GND

24 I/O

25 TRST, I/O

26 I/O

27 I/O

28 I/O

29 I/O

30 I/O

31 I/O

32 VCCI

33 VCCA

34 I/O

35 I/O

36 I/O

37 I/O

38 I/O

39 I/O

40 I/O

41 I/O

42 I/O

43 I/O

44 GND

45 I/O

46 I/O

47 I/O

48 I/O

49 I/O

50 I/O

51 I/O

52 VCCI

53 I/O

54 I/O

55 I/O

56 I/O

57 I/O

58 I/O

59 I/O

60 I/O

61 I/O

62 I/O

63 I/O

64 PRB, I/O

65 GND

66 VCCA

67 NC

68 I/O

69 HCLK

70 I/O

71 I/O

72 I/O

176-Pin TQFP

Number

A54SX32A

Function

73 I/O

74 I/O

75 I/O

76 I/O

77 I/O

78 I/O

79 I/O

80 I/O

81 I/O

82 VCCI

83 I/O

84 I/O

85 I/O

86 I/O

87 TDO, I/O

88 I/O

89 GND

90 I/O

91 I/O

92 I/O

93 I/O

94 I/O

95 I/O

96 I/O

97 I/O

98 VCCA

99 VCCI

100 I/O

101 I/O

102 I/O

103 I/O

104 I/O

105 I/O

106 I/O

107 I/O

108 GND

176-Pin TQFP

Number

A54SX32A

Function

109 VCCA

110 GND

111 I/O

112 I/O

113 I/O

114 I/O

115 I/O

116 I/O

117 I/O

118 I/O

119 I/O

120 I/O

121 I/O

122 VCCA

123 GND

124 VCCI

125 I/O

126 I/O

127 I/O

128 I/O

129 I/O

130 I/O

131 I/O

132 I/O

133 GND

134 I/O

135 I/O

136 I/O

137 I/O

138 I/O

139 I/O

140 VCCI

141 I/O

142 I/O

143 I/O

144 I/O

176-Pin TQFP

Number

A54SX32A

Function

SX-A Family FPGAs

v5.1 3-13

145 I/O

146 I/O

147 I/O

148 I/O

149 I/O

150 I/O

151 I/O

152 CLKA

153 CLKB

154 NC

155 GND

156 VCCA

157 PRA, I/O

158 I/O

159 I/O

160 I/O

161 I/O

162 I/O

163 I/O

164 I/O

165 I/O

166 I/O

167 I/O

168 I/O

169 VCCI

170 I/O

171 I/O

172 I/O

173 I/O

174 I/O

175 I/O

176 TCK, I/O

176-Pin TQFP

Number

A54SX32A

Function

SX-A Family FPGAs

3-14 v5.1

329-Pin PBGA

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-5 • 329-Pin PBGA (Top View)

2322212019181716151410 11 12 13987654321

SX-A Family FPGAs

v5.1 3-15

329-Pin PBGA

Number

A54SX32A

Function

A1 GND

A2 GND

A3 VCCI

A4 NC

A5 I/O

A6 I/O

A7 VCCI

A8 NC

A9 I/O

A10 I/O

A11 I/O

A12 I/O

A13 CLKB

A14 I/O

A15 I/O

A16 I/O

A17 I/O

A18 I/O

A19 I/O

A20 I/O

A21 NC

A22 VCCI

A23 GND

AA1 VCCI

AA2 I/O

AA3 GND

AA4 I/O

AA5 I/O

AA6 I/O

AA7 I/O

AA8 I/O

AA9 I/O

AA10 I/O

AA11 I/O

AA12 I/O

AA13 I/O

AA14 I/O

AA15 I/O

AA16 I/O

AA17 I/O

AA18 I/O

AA19 I/O

AA20 TDO, I/O

AA21 VCCI

AA22 I/O

AA23 VCCI

AB1 I/O

AB2 GND

AB3 I/O

AB4 I/O

AB5 I/O

AB6 I/O

AB7 I/O

AB8 I/O

AB9 I/O

AB10 I/O

AB11 PRB, I/O

AB12 I/O

AB13 HCLK

AB14 I/O

AB15 I/O

AB16 I/O

AB17 I/O

AB18 I/O

AB19 I/O

AB20 I/O

AB21 I/O

AB22 GND

AB23 I/O

AC1 GND

AC2 VCCI

AC3 NC

AC4 I/O

AC5 I/O

329-Pin PBGA

Number

A54SX32A

Function

AC6 I/O

AC7 I/O

AC8 I/O

AC9 VCCI

AC10 I/O

AC11 I/O

AC12 I/O

AC13 I/O

AC14 I/O

AC15 NC

AC16 I/O

AC17 I/O

AC18 I/O

AC19 I/O

AC20 I/O

AC21 NC

AC22 VCCI

AC23 GND

B1 VCCI

B2 GND

B3 I/O

B4 I/O

B5 I/O

B6 I/O

B7 I/O

B8 I/O

B9 I/O

B10 I/O

B11 I/O

B12 PRA, I/O

B13 CLKA

B14 I/O

B15 I/O

B16 I/O

B17 I/O

B18 I/O

B19 I/O

329-Pin PBGA

Number

A54SX32A

Function

B20 I/O

B21 I/O

B22 GND

B23 VCCI

C1 NC

C2 TDI, I/O

C3 GND

C4 I/O

C5 I/O

C6 I/O

C7 I/O

C8 I/O

C9 I/O

C10 I/O

C11 I/O

C12 I/O

C13 I/O

C14 I/O

C15 I/O

C16 I/O

C17 I/O

C18 I/O

C19 I/O

C20 I/O

C21 VCCI

C22 GND

C23 NC

D1 I/O

D2 I/O

D3 I/O

D4 TCK, I/O

D5 I/O

D6 I/O

D7 I/O

D8 I/O

D9 I/O

D10 I/O

329-Pin PBGA

Number

A54SX32A

Function

SX-A Family FPGAs

3-16 v5.1

D11 VCCA

D12 NC

D13 I/O

D14 I/O

D15 I/O

D16 I/O

D17 I/O

D18 I/O

D19 I/O

D20 I/O

D21 I/O

D22 I/O

D23 I/O

E1 VCCI

E2 I/O

E3 I/O

E4 I/O

E20 I/O

E21 I/O

E22 I/O

E23 I/O

F1 I/O

F2 TMS

F3 I/O

F4 I/O

F20 I/O

F21 I/O

F22 I/O

F23 I/O

G1 I/O

G2 I/O

G3 I/O

G4 I/O

G20 I/O

G21 I/O

G22 I/O

G23 GND

329-Pin PBGA

Number

A54SX32A

Function

H1 I/O

H2 I/O

H3 I/O

H4 I/O

H20 VCCA

H21 I/O

H22 I/O

H23 I/O

J1 NC

J2 I/O

J3 I/O

J4 I/O

J20 I/O

J21 I/O

J22 I/O

J23 I/O

K1 I/O

K2 I/O

K3 I/O

K4 I/O

K10 GND

K11 GND

K12 GND

K13 GND

K14 GND

K20 I/O

K21 I/O

K22 I/O

K23 I/O

L1 I/O

L2 I/O

L3 I/O

L4 NC

L10 GND

L11 GND

L12 GND

L13 GND

329-Pin PBGA

Number

A54SX32A

Function

L14 GND

L20 NC

L21 I/O

L22 I/O

L23 NC

M1 I/O

M2 I/O

M3 I/O

M4 VCCA

M10 GND

M11 GND

M12 GND

M13 GND

M14 GND

M20 VCCA

M21 I/O

M22 I/O

M23 VCCI

N1 I/O

N2 TRST, I/O

N3 I/O

N4 I/O

N10 GND

N11 GND

N12 GND

N13 GND

N14 GND

N20 NC

N21 I/O

N22 I/O

N23 I/O

P1 I/O

P2 I/O

P3 I/O

P4 I/O

P10 GND

P11 GND

329-Pin PBGA

Number

A54SX32A

Function

P12 GND

P13 GND

P14 GND

P20 I/O

P21 I/O

P22 I/O

P23 I/O

R1 I/O

R2 I/O

R3 I/O

R4 I/O

R20 I/O

R21 I/O

R22 I/O

R23 I/O

T1 I/O

T2 I/O

T3 I/O

T4 I/O

T20 I/O

T21 I/O

T22 I/O

T23 I/O

U1 I/O

U2 I/O

U3 VCCA

U4 I/O

U20 I/O

U21 VCCA

U22 I/O

U23 I/O

V1 VCCI

V2 I/O

V3 I/O

V4 I/O

V20 I/O

V21 I/O

329-Pin PBGA

Number

A54SX32A

Function

SX-A Family FPGAs

v5.1 3-17

V22 I/O

V23 I/O

W1 I/O

W2 I/O

W3 I/O

W4 I/O

W20 I/O

W21 I/O

W22 I/O

W23 NC

Y1 NC

Y2 I/O

Y3 I/O

Y4 GND

Y5 I/O

Y6 I/O

Y7 I/O

Y8 I/O

Y9 I/O

Y10 I/O

Y11 I/O

Y12 VCCA

Y13 NC

Y14 I/O

Y15 I/O

Y16 I/O

Y17 I/O

Y18 I/O

Y19 I/O

Y20 GND

Y21 I/O

Y22 I/O

Y23 I/O

329-Pin PBGA

Number

A54SX32A

Function

SX-A Family FPGAs

3-18 v5.1

144-Pin FBGA

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-6 • 144-Pin FBGA (Top View)

12345678910 11 12

SX-A Family FPGAs

v5.1 3-19

144-Pin FBGA

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

A1 I/O I/O I/O

A2 I/O I/O I/O

A3 I/O I/O I/O

A4 I/O I/O I/O

A5 VCCA VCCA VCCA

A6 GND GND GND

A7 CLKA CLKA CLKA

A8 I/O I/O I/O

A9 I/O I/O I/O

A10 I/O I/O I/O

A11 I/O I/O I/O

A12 I/O I/O I/O

B1 I/O I/O I/O

B2 GND GND GND

B3 I/O I/O I/O

B4 I/O I/O I/O

B5 I/O I/O I/O

B6 I/O I/O I/O

B7 CLKB CLKB CLKB

B8 I/O I/O I/O

B9 I/O I/O I/O

B10 I/O I/O I/O

B11 GND GND GND

B12 I/O I/O I/O

C1 I/O I/O I/O

C2 I/O I/O I/O

C3 TCK, I/O TCK, I/O TCK, I/O

C4 I/O I/O I/O

C5 I/O I/O I/O

C6 PRA, I/O PRA, I/O PRA, I/O

C7 I/O I/O I/O

C8 I/O I/O I/O

C9 I/O I/O I/O

C10 I/O I/O I/O

C11 I/O I/O I/O

C12 I/O I/O I/O

D1 I/O I/O I/O

D2 VCCI VCCI VCCI

D3 TDI, I/O TDI, I/O TDI, I/O

D4 I/O I/O I/O

D5 I/O I/O I/O

D6 I/O I/O I/O

D7 I/O I/O I/O

D8 I/O I/O I/O

D9 I/O I/O I/O

D10 I/O I/O I/O

D11 I/O I/O I/O

D12 I/O I/O I/O

E1 I/O I/O I/O

E2 I/O I/O I/O

E3 I/O I/O I/O

E4 I/O I/O I/O

E5 TMS TMS TMS

E6 VCCI VCCI VCCI

E7 VCCI VCCI VCCI

E8 VCCI VCCI VCCI

E9 VCCA VCCA VCCA

E10 I/O I/O I/O

E11 GND GND GND

E12 I/O I/O I/O

F1 I/O I/O I/O

F2 I/O I/O I/O

F3 NC NC NC

F4 I/O I/O I/O

F5 GND GND GND

F6 GND GND GND

F7 GND GND GND

F8 VCCI VCCI VCCI

F9 I/O I/O I/O

F10 GND GND GND

F11 I/O I/O I/O

F12 I/O I/O I/O

144-Pin FBGA

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

SX-A Family FPGAs

3-20 v5.1

G1 I/O I/O I/O

G2 GND GND GND

G3 I/O I/O I/O

G4 I/O I/O I/O

G5 GND GND GND

G6 GND GND GND

G7 GND GND GND

G8 VCCI VCCI VCCI

G9 I/O I/O I/O

G10 I/O I/O I/O

G11 I/O I/O I/O

G12 I/O I/O I/O

H1 TRST, I/O TRST, I/O TRST, I/O

H2 I/O I/O I/O

H3 I/O I/O I/O

H4 I/O I/O I/O

H5 VCCA VCCA VCCA

H6 VCCA VCCA VCCA

H7 VCCI VCCI VCCI

H8 VCCI VCCI VCCI

H9 VCCA VCCA VCCA

H10 I/O I/O I/O

H11 I/O I/O I/O

H12NCNCNC

J1 I/O I/O I/O

J2 I/O I/O I/O

J3 I/O I/O I/O

J4 I/O I/O I/O

J5 I/O I/O I/O

J6 PRB, I/O PRB, I/O PRB, I/O

J7 I/O I/O I/O

J8 I/O I/O I/O

J9 I/O I/O I/O

J10 I/O I/O I/O

J11 I/O I/O I/O

J12 VCCA VCCA VCCA

144-Pin FBGA

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

K1 I/O I/O I/O

K2 I/O I/O I/O

K3 I/O I/O I/O

K4 I/O I/O I/O

K5 I/O I/O I/O

K6 I/O I/O I/O

K7 GND GND GND

K8 I/O I/O I/O

K9 I/O I/O I/O

K10 GND GND GND

K11 I/O I/O I/O

K12 I/O I/O I/O

L1 GND GND GND

L2 I/O I/O I/O

L3 I/O I/O I/O

L4 I/O I/O I/O

L5 I/O I/O I/O

L6 I/O I/O I/O

L7 HCLK HCLK HCLK

L8 I/O I/O I/O

L9 I/O I/O I/O

L10 I/O I/O I/O

L11 I/O I/O I/O

L12 I/O I/O I/O

M1 I/O I/O I/O

M2 I/O I/O I/O

M3 I/O I/O I/O

M4 I/O I/O I/O

M5 I/O I/O I/O

M6 I/O I/O I/O

M7 VCCA VCCA VCCA

M8 I/O I/O I/O

M9 I/O I/O I/O

M10 I/O I/O I/O

M11 TDO, I/O TDO, I/O TDO, I/O

M12 I/O I/O I/O

144-Pin FBGA

Pin Number

A54SX08A

Function

A54SX16A

Function

A54SX32A

Function

SX-A Family FPGAs

v5.1 3-21

256-Pin FBGA

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-7 • 256-Pin FBGA (Top View)

1357911

13 15

246

810 12 14 16

SX-A Family FPGAs

3-22 v5.1

256-Pin FBGA

Pin Number

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

A1 GND GND GND

A2 TCK, I/O TCK, I/O TCK, I/O

A3 I/O I/O I/O

A4 I/O I/O I/O

A5 I/O I/O I/O

A6 I/O I/O I/O

A7 I/O I/O I/O

A8 I/O I/O I/O

A9 CLKB CLKB CLKB

A10 I/O I/O I/O

A11 I/O I/O I/O

A12 NC I/O I/O

A13 I/O I/O I/O

A14 I/O I/O I/O

A15 GND GND GND

A16 GND GND GND

B1 I/O I/O I/O

B2 GND GND GND

B3 I/O I/O I/O

B4 I/O I/O I/O

B5 I/O I/O I/O

B6 NC I/O I/O

B7 I/O I/O I/O

B8 VCCA VCCA VCCA

B9 I/O I/O I/O

B10 I/O I/O I/O

B11 NC I/O I/O

B12 I/O I/O I/O

B13 I/O I/O I/O

B14 I/O I/O I/O

B15 GND GND GND

B16 I/O I/O I/O

C1 I/O I/O I/O

C2 TDI, I/O TDI, I/O TDI, I/O

C3 GND GND GND

C4 I/O I/O I/O

C5 NC I/O I/O

C6 I/O I/O I/O

C7 I/O I/O I/O

C8 I/O I/O I/O

C9 CLKA CLKA CLKA

C10 I/O I/O I/O

C11 I/O I/O I/O

C12 I/O I/O I/O

C13 I/O I/O I/O

C14 I/O I/O I/O

C15 I/O I/O I/O

C16 I/O I/O I/O

D1 I/O I/O I/O

D2 I/O I/O I/O

D3 I/O I/O I/O

D4 I/O I/O I/O

D5 I/O I/O I/O

D6 I/O I/O I/O

D7 I/O I/O I/O

D8 PRA, I/O PRA, I/O PRA, I/O

D9 I/O I/O QCLKD

D10 I/O I/O I/O

D11 NC I/O I/O

D12 I/O I/O I/O

D13 I/O I/O I/O

D14 I/O I/O I/O

D15 I/O I/O I/O

D16 I/O I/O I/O

E1 I/O I/O I/O

E2 I/O I/O I/O

E3 I/O I/O I/O

E4 I/O I/O I/O

E5 I/O I/O I/O

E6 I/O I/O I/O

E7 I/O I/O QCLKC

E8 I/O I/O I/O

E9 I/O I/O I/O

E10 I/O I/O I/O

256-Pin FBGA

Pin Number

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

SX-A Family FPGAs

v5.1 3-23

E11 I/O I/O I/O

E12 I/O I/O I/O

E13 NC I/O I/O

E14 I/O I/O I/O

E15 I/O I/O I/O

E16 I/O I/O I/O

F1 I/O I/O I/O

F2 I/O I/O I/O

F3 I/O I/O I/O

F4 TMS TMS TMS

F5 I/O I/O I/O

F6 I/O I/O I/O

F7 VCCI VCCI VCCI

F8 VCCI VCCI VCCI

F9 VCCI VCCI VCCI

F10 VCCI VCCI VCCI

F11 I/O I/O I/O

F12 VCCA VCCA VCCA

F13 I/O I/O I/O

F14 I/O I/O I/O

F15 I/O I/O I/O

F16 I/O I/O I/O

G1 NC I/O I/O

G2 I/O I/O I/O

G3 NC I/O I/O

G4 I/O I/O I/O

G5 I/O I/O I/O

G6 VCCI VCCI VCCI

G7 GND GND GND

G8 GND GND GND

G9 GND GND GND

G10 GND GND GND

G11 VCCI VCCI VCCI

G12 I/O I/O I/O

G13 GND GND GND

G14 NC I/O I/O

G15 VCCA VCCA VCCA

256-Pin FBGA

Pin Number

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

G16 I/O I/O I/O

H1 I/O I/O I/O

H2 I/O I/O I/O

H3 VCCA VCCA VCCA

H4 TRST, I/O TRST, I/O TRST, I/O

H5 I/O I/O I/O

H6 VCCI VCCI VCCI

H7 GND GND GND

H8 GND GND GND

H9 GND GND GND

H10 GND GND GND

H11 VCCI VCCI VCCI

H12 I/O I/O I/O

H13 I/O I/O I/O

H14 I/O I/O I/O

H15 I/O I/O I/O

H16 NC I/O I/O

J1 NC I/O I/O

J2 NC I/O I/O

J3 NC I/O I/O

J4 I/O I/O I/O

J5 I/O I/O I/O

J6 VCCI VCCI VCCI

J7 GND GND GND

J8 GND GND GND

J9 GND GND GND

J10 GND GND GND

J11 VCCI VCCI VCCI

J12 I/O I/O I/O

J13 I/O I/O I/O

J14 I/O I/O I/O

J15 I/O I/O I/O

J16 I/O I/O I/O

K1 I/O I/O I/O

K2 I/O I/O I/O

K3 NC I/O I/O

K4 VCCA VCCA VCCA

256-Pin FBGA

Pin Number

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

SX-A Family FPGAs

3-24 v5.1

K5 I/O I/O I/O

K6 VCCI VCCI VCCI

K7 GND GND GND

K8 GND GND GND

K9 GND GND GND

K10 GND GND GND

K11 VCCI VCCI VCCI

K12 I/O I/O I/O

K13 I/O I/O I/O

K14 I/O I/O I/O

K15 NC I/O I/O

K16 I/O I/O I/O

L1 I/O I/O I/O

L2 I/O I/O I/O

L3 I/O I/O I/O

L4 I/O I/O I/O

L5 I/O I/O I/O

L6 I/O I/O I/O

L7 VCCI VCCI VCCI

L8 VCCI VCCI VCCI

L9 VCCI VCCI VCCI

L10 VCCI VCCI VCCI

L11 I/O I/O I/O

L12 I/O I/O I/O

L13 I/O I/O I/O

L14 I/O I/O I/O

L15 I/O I/O I/O

L16 NC I/O I/O

M1 I/O I/O I/O

M2 I/O I/O I/O

M3 I/O I/O I/O

M4 I/O I/O I/O

M5 I/O I/O I/O

M6 I/O I/O I/O

M7 I/O I/O QCLKA

M8 PRB, I/O PRB, I/O PRB, I/O

M9 I/O I/O I/O

256-Pin FBGA

Pin Number

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

M10 I/O I/O I/O

M11 I/O I/O I/O

M12 NC I/O I/O

M13 I/O I/O I/O

M14 NC I/O I/O

M15 I/O I/O I/O

M16 I/O I/O I/O

N1 I/O I/O I/O

N2 I/O I/O I/O

N3 I/O I/O I/O

N4 I/O I/O I/O

N5 I/O I/O I/O

N6 I/O I/O I/O

N7 I/O I/O I/O

N8 I/O I/O I/O

N9 I/O I/O I/O

N10 I/O I/O I/O

N11 I/O I/O I/O

N12 I/O I/O I/O

N13 I/O I/O I/O

N14 I/O I/O I/O

N15 I/O I/O I/O

N16 I/O I/O I/O

P1 I/O I/O I/O

P2 GND GND GND

P3 I/O I/O I/O

P4 I/O I/O I/O

P5 NC I/O I/O

P6 I/O I/O I/O

P7 I/O I/O I/O

P8 I/O I/O I/O

P9 I/O I/O I/O

P10 NC I/O I/O

P11 I/O I/O I/O

P12 I/O I/O I/O

P13 VCCA VCCA VCCA

P14 I/O I/O I/O

256-Pin FBGA

Pin Number

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

SX-A Family FPGAs

v5.1 3-25

P15 I/O I/O I/O

P16 I/O I/O I/O

R1 I/O I/O I/O

R2 GND GND GND

R3 I/O I/O I/O

R4 NC I/O I/O

R5 I/O I/O I/O

R6 I/O I/O I/O

R7 I/O I/O I/O

R8 I/O I/O I/O

R9 HCLK HCLK HCLK

R10 I/O I/O QCLKB

R11 I/O I/O I/O

R12 I/O I/O I/O

R13 I/O I/O I/O

R14 I/O I/O I/O

R15 GND GND GND

R16 GND GND GND

T1 GND GND GND

T2 I/O I/O I/O

T3 I/O I/O I/O

T4 NC I/O I/O

T5 I/O I/O I/O

T6 I/O I/O I/O

T7 I/O I/O I/O

T8 I/O I/O I/O

T9 VCCA VCCA VCCA

T10 I/O I/O I/O

T11 I/O I/O I/O

T12 NC I/O I/O

T13 I/O I/O I/O

T14 I/O I/O I/O

T15 TDO, I/O TDO, I/O TDO, I/O

T16 GND GND GND

256-Pin FBGA

Pin Number

A54SX16A

Function

A54SX32A

Function

A54SX72A

Function

SX-A Family FPGAs

3-26 v5.1

484-Pin FBGA

Note

For Package Manufacturing and Environmental information, visit Resource center at

http://www.actel.com/products/rescenter/package/index.html.

Figure 3-8 • 484-Pin FBGA (Top View)

123 4 5 6 7 8 9 10111213141516171819 20212223 242526

SX-A Family FPGAs

v5.1 3-27

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

A1 NC* NC

A2 NC* NC

A3 NC* I/O

A4 NC* I/O

A5 NC* I/O

A6 I/O I/O

A7 I/O I/O

A8 I/O I/O

A9 I/O I/O

A10 I/O I/O

A11 NC* I/O

A12 NC* I/O

A13 I/O I/O

A14 NC* NC

A15 NC* I/O

A16 NC* I/O

A17 I/O I/O

A18 I/O I/O

A19 I/O I/O

A20 I/O I/O

A21 NC* I/O

A22 NC* I/O

A23 NC* I/O

A24 NC* I/O

A25 NC* NC

A26 NC* NC

AA1 NC* I/O

AA2 NC* I/O

AA3 VCCA VCCA

AA4 I/O I/O

AA5 I/O I/O

AA22 I/O I/O

AA23 I/O I/O

AA24 I/O I/O

AA25 NC* I/O

AA26 NC* I/O

AB1 NC* NC

AB2 VCCI VCCI

AB3 I/O I/O

AB4 I/O I/O

AB5 NC* I/O

AB6 I/O I/O

AB7 I/O I/O

AB8 I/O I/O

AB9 I/O I/O

AB10 I/O I/O

AB11 I/O I/O

AB12 PRB, I/O PRB, I/O

AB13 VCCA VCCA

AB14 I/O I/O

AB15 I/O I/O

AB16 I/O I/O

AB17 I/O I/O

AB18 I/O I/O

AB19 I/O I/O

AB20 TDO, I/O TDO, I/O

AB21 GND GND

AB22 NC* I/O

AB23 I/O I/O

AB24 I/O I/O

AB25 NC* I/O

AB26 NC* I/O

AC1 I/O I/O

AC2 I/O I/O

AC3 I/O I/O

AC4 NC* I/O

AC5 VCCI VCCI

AC6 I/O I/O

AC7 VCCI VCCI

AC8 I/O I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

AC9 I/O I/O

AC10 I/O I/O

AC11 I/O I/O

AC12 I/O QCLKA

AC13 I/O I/O

AC14 I/O I/O

AC15 I/O I/O

AC16 I/O I/O

AC17 I/O I/O

AC18 I/O I/O

AC19 I/O I/O

AC20 VCCI VCCI

AC21 I/O I/O

AC22 I/O I/O

AC23 NC* I/O

AC24 I/O I/O

AC25 NC* I/O

AC26 NC* I/O

AD1 I/O I/O

AD2 I/O I/O

AD3 GND GND

AD4 I/O I/O

AD5 I/O I/O

AD6 I/O I/O

AD7 I/O I/O

AD8 I/O I/O

AD9 VCCI VCCI

AD10 I/O I/O

AD11 I/O I/O

AD12 I/O I/O

AD13 VCCI VCCI

AD14 I/O I/O

AD15 I/O I/O

AD16 I/O I/O

AD17 VCCI VCCI

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

Note: *These pins must be left floating on the A54SX32A device.

SX-A Family FPGAs

3-28 v5.1

AD18 I/O I/O

AD19 I/O I/O

AD20 I/O I/O

AD21 I/O I/O

AD22 I/O I/O

AD23 VCCI VCCI

AD24 NC* I/O

AD25 NC* I/O

AD26 NC* I/O

AE1 NC* NC

AE2 I/O I/O

AE3 NC* I/O

AE4 NC* I/O

AE5 NC* I/O

AE6 NC* I/O

AE7 I/O I/O

AE8 I/O I/O

AE9 I/O I/O

AE10 I/O I/O

AE11 NC* I/O

AE12 I/O I/O

AE13 I/O I/O

AE14 I/O I/O

AE15 NC* I/O

AE16 NC* I/O

AE17 I/O I/O

AE18 I/O I/O

AE19 I/O I/O

AE20 I/O I/O

AE21 NC* I/O

AE22 NC* I/O

AE23 NC* I/O

AE24 NC* I/O

AE25 NC* NC

AE26 NC* NC

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

AF1 NC* NC

AF2 NC* NC

AF3 NC I/O

AF4 NC* I/O

AF5 NC* I/O

AF6 NC* I/O

AF7 I/O I/O

AF8 I/O I/O

AF9 I/O I/O

AF10 I/O I/O

AF11 NC* I/O

AF12 NC* NC

AF13 HCLK HCLK

AF14 I/O QCLKB

AF15 NC* I/O

AF16 NC* I/O

AF17 I/O I/O

AF18 I/O I/O

AF19 I/O I/O

AF20 NC* I/O

AF21 NC* I/O

AF22 NC* I/O

AF23 NC* I/O

AF24 NC* I/O

AF25 NC* NC

AF26 NC* NC

B1 NC* NC

B2 NC* NC

B3 NC* I/O

B4 NC* I/O

B5 NC* I/O

B6 I/O I/O

B7 I/O I/O

B8 I/O I/O

B9 I/O I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

B10 I/O I/O

B11 NC* I/O

B12 NC* I/O

B13 VCCI VCCI

B14 CLKA CLKA

B15 NC* I/O

B16 NC* I/O

B17 I/O I/O

B18 VCCI VCCI

B19 I/O I/O

B20 I/O I/O

B21 NC* I/O

B22 NC* I/O

B23 NC* I/O

B24 NC* I/O

B25 I/O I/O

B26 NC* NC

C1 NC* I/O

C2 NC* I/O

C3 NC* I/O

C4 NC* I/O

C5 I/O I/O

C6 VCCI VCCI

C7 I/O I/O

C8 I/O I/O

C9 VCCI VCCI

C10 I/O I/O

C11 I/O I/O

C12 I/O I/O

C13 PRA, I/O PRA, I/O

C14 I/O I/O

C15 I/O QCLKD

C16 I/O I/O

C17 I/O I/O

C18 I/O I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

Note: *These pins must be left floating on the A54SX32A device.

SX-A Family FPGAs

v5.1 3-29

C19 I/O I/O

C20 VCCI VCCI

C21 I/O I/O

C22 I/O I/O

C23 I/O I/O

C24 I/O I/O

C25 NC* I/O

C26 NC* I/O

D1 NC* I/O

D2 TMS TMS

D3 I/O I/O

D4 VCCI VCCI

D5 NC* I/O

D6 TCK, I/O TCK, I/O

D7 I/O I/O

D8 I/O I/O

D9 I/O I/O

D10 I/O I/O

D11 I/O I/O

D12 I/O QCLKC

D13 I/O I/O

D14 I/O I/O

D15 I/O I/O

D16 I/O I/O

D17 I/O I/O

D18 I/O I/O

D19 I/O I/O

D20 I/O I/O

D21 VCCI VCCI

D22 GND GND

D23 I/O I/O

D24 I/O I/O

D25 NC* I/O

D26 NC* I/O

E1 NC* I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

E2 NC* I/O

E3 I/O I/O

E4 I/O I/O

E5 GND GND

E6 TDI, IO TDI, IO

E7 I/O I/O

E8 I/O I/O

E9 I/O I/O

E10 I/O I/O

E11 I/O I/O

E12 I/O I/O

E13 VCCA VCCA

E14 CLKB CLKB

E15 I/O I/O

E16 I/O I/O

E17 I/O I/O

E18 I/O I/O

E19 I/O I/O

E20 I/O I/O

E21 I/O I/O

E22 I/O I/O

E23 I/O I/O

E24 I/O I/O

E25 VCCI VCCI

E26 GND GND

F1 VCCI VCCI

F2 NC* I/O

F3 NC* I/O

F4 I/O I/O

F5 I/O I/O

F22 I/O I/O

F23 I/O I/O

F24 I/O I/O

F25 I/O I/O

F26 NC* I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

G1 NC* I/O

G2 NC* I/O

G3 NC* I/O

G4 I/O I/O

G5 I/O I/O

G22 I/O I/O

G23 VCCA VCCA

G24 I/O I/O

G25 NC* I/O

G26 NC* I/O

H1 NC* I/O

H2 NC* I/O

H3 I/O I/O

H4 I/O I/O

H5 I/O I/O

H22 I/O I/O

H23 I/O I/O

H24 I/O I/O

H25 NC* I/O

H26 NC* I/O

J1 NC* I/O

J2 NC* I/O

J3 I/O I/O

J4 I/O I/O

J5 I/O I/O

J22 I/O I/O

J23 I/O I/O

J24 I/O I/O

J25 VCCI VCCI

J26 NC* I/O

K1 I/O I/O

K2 VCCI VCCI

K3 I/O I/O

K4 I/O I/O

K5 VCCA VCCA

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

Note: *These pins must be left floating on the A54SX32A device.

SX-A Family FPGAs

3-30 v5.1

K10 GND GND

K11 GND GND

K12 GND GND

K13 GND GND

K14 GND GND

K15 GND GND

K16 GND GND

K17 GND GND

K22 I/O I/O

K23 I/O I/O

K24 NC* NC

K25 NC* I/O

K26 NC* I/O

L1 NC* I/O

L2 NC* I/O

L3 I/O I/O

L4 I/O I/O

L5 I/O I/O

L10 GND GND

L11 GND GND

L12 GND GND

L13 GND GND

L14 GND GND

L15 GND GND

L16 GND GND

L17 GND GND

L22 I/O I/O

L23 I/O I/O

L24 I/O I/O

L25 I/O I/O

L26 I/O I/O

M1 NC* NC

M2 I/O I/O

M3 I/O I/O

M4 I/O I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

M5 I/O I/O

M10 GND GND

M11 GND GND

M12 GND GND

M13 GND GND

M14 GND GND

M15 GND GND

M16 GND GND

M17 GND GND

M22 I/O I/O

M23 I/O I/O

M24 I/O I/O

M25 NC* I/O

M26 NC* I/O

N1 I/O I/O

N2 VCCI VCCI

N3 I/O I/O

N4 I/O I/O

N5 I/O I/O

N10 GND GND

N11 GND GND

N12 GND GND

N13 GND GND

N14 GND GND

N15 GND GND

N16 GND GND

N17 GND GND

N22 VCCA VCCA

N23 I/O I/O

N24 I/O I/O

N25 I/O I/O

N26 NC* NC

P1 NC* I/O

P2 NC* I/O

P3 I/O I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

P4 I/O I/O

P5 VCCA VCCA

P10 GND GND

P11 GND GND

P12 GND GND

P13 GND GND

P14 GND GND

P15 GND GND

P16 GND GND

P17 GND GND

P22 I/O I/O

P23 I/O I/O

P24 VCCI VCCI

P25 I/O I/O

P26 I/O I/O

R1 NC* I/O

R2 NC* I/O

R3 I/O I/O

R4 I/O I/O

R5 TRST, I/O TRST, I/O

R10 GND GND

R11 GND GND

R12 GND GND

R13 GND GND

R14 GND GND

R15 GND GND

R16 GND GND

R17 GND GND

R22 I/O I/O

R23 I/O I/O

R24 I/O I/O

R25 NC* I/O

R26 NC* I/O

T1 NC* I/O

T2 NC* I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

Note: *These pins must be left floating on the A54SX32A device.

SX-A Family FPGAs

v5.1 3-31

T3 I/O I/O

T4 I/O I/O

T5 I/O I/O

T10 GND GND

T11 GND GND

T12 GND GND

T13 GND GND

T14 GND GND

T15 GND GND

T16 GND GND

T17 GND GND

T22 I/O I/O

T23 I/O I/O

T24 I/O I/O

T25 NC* I/O

T26 NC* I/O

U1 I/O I/O

U2 VCCI VCCI

U3 I/O I/O

U4 I/O I/O

U5 I/O I/O

U10 GND GND

U11 GND GND

U12 GND GND

U13 GND GND

U14 GND GND

U15 GND GND

U16 GND GND

U17 GND GND

U22 I/O I/O

U23 I/O I/O

U24 I/O I/O

U25 VCCI VCCI

U26 I/O I/O

V1 NC* I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

V2 NC* I/O

V3 I/O I/O

V4 I/O I/O

V5 I/O I/O

V22 VCCA VCCA

V23 I/O I/O

V24 I/O I/O

V25 NC* I/O

V26 NC* I/O

W1 I/O I/O

W2 I/O I/O

W3 I/O I/O

W4 I/O I/O

W5 I/O I/O

W22 I/O I/O

W23 VCCA VCCA

W24 I/O I/O

W25 NC* I/O

W26 NC* I/O

Y1 NC* I/O

Y2 NC* I/O

Y3 I/O I/O

Y4 I/O I/O

Y5 NC* I/O

Y22 I/O I/O

Y23 I/O I/O

Y24 VCCI VCCI

Y25 I/O I/O

Y26 I/O I/O

484-Pin FBGA

Number

A54SX32A

Function

A54SX72A

Function

Note: *These pins must be left floating on the A54SX32A device.

SX-A Family FPGAs

v5.1 4-1

Datasheet Information

List of Changes

The following table lists critical changes that were made in the current version of the document.

Previous Version Changes in Current Version (v5.1) Page

v5.0 Revised Tab le 1 and the timing data to reflect the phase out of the –3 speed grade for the

A54SX08A device.

The "Thermal Characteristics" section was updated. 2-11

The "176-Pin TQFP" was updated to add pins 81 to 90. 3-11

The "484-Pin FBGA" was updated to add pins R4 to Y26 3-26

v4.0 The "Temperature Grade Offering" is new. 1-iii

The "Speed Grade and Temperature Grade Matrix" is new. 1-iii

"SX-A Family Architecture" was updated. 1-1

"Clock Resources" was updated. 1-5

"User Security" was updated. 1-7

"Power-Up/Down and Hot Swapping" was updated. 1-7

"Dedicated Mode" is new 1-9

Tab le 1 -5 is new. 1-9

"JTAG Instructions" is new 1-10

"Design Considerations" was updated. 1-12

The "Programming" section is new. 1-13

"Design Environment" was updated. 1-13

"Pin Description" was updated. 1-14

Tab le 2 -1 was updated. 2-1

Tab le 2 -2 was updated. 2-1

Tab le 2 -3 is new. 2-1

Tab le 2 -4 is new. 2-1

Tab le 2 -5 was updated. 2-2

Tab le 2 -6 was updated. 2-2

"Power Dissipation" is new. 2-8

Tab le 2 -1 1 was updated. 2-9

Tab le 2 -1 2 was updated. 2-11

The was updated. 2-14

The "Sample Path Calculations" were updated. 2-14

Tab le 2 -1 3 was updated. 2-17

SX-A Family FPGAs

4-2 v5.1

Tab le 2 -1 3 was updated. 2-17

All timing tables were updated. 2-18 to

2-52

v3.0 The "Actel Secure Programming Technology with FuseLock™ Prevents Reverse Engineering and

Design Theft" section was updated.

1-i

The "Ordering Information" section was updated. 1-ii

The "Temperature Grade Offering" section was updated. 1-iii

The Figure 1-1 • SX-A Family Interconnect Elements was updated. 1-1

The “"Clock Resources" section“was updated 1-5

The Table 1-1 • SX-A Clock Resources is new. 1-5

The "User Security" section is new. 1-7

The "I/O Modules" section was updated. 1-7

The Table 1-2 • I/O Features was updated. 1-8

The Table 1-3 • I/O Characteristics for All I/O Configurations is new. 1-8

The Table 1-4 • Power-Up Time at which I/Os Become Active is new 1-8

The Figure 1-12 • Device Selection Wizard is new. 1-9

The "Boundary-Scan Pin Configurations and Functions" section is new. 1-9

The Table 1-9 • Device Configuration Options for Probe Capability (TRST Pin Reserved) is new. 1-11

The "SX-A Probe Circuit Control Pins" section was updated. 1-12

The "Design Considerations" section was updated. 1-12

The Figure 1-13 • Probe Setup was updated. 1-12

The Design Environment was updated. 1-13

The Figure 1-13 • Design Flow is new. 1-11

The "Absolute Maximum Ratings*" section was updated. 1-12

The "Recommended Operating Conditions" section was updated. 1-12

The "Electrical Specifications" section was updated. 1-12

The "2.5V LVCMOS2 Electrical Specifications" section was updated. 1-13

The "SX-A Timing Model" and "Sample Path Calculations" equations were updated. 1-23

The "Pin Description" section was updated. 1-14

v2.0.1 The "Design Environment" section has been updated. 1-13

The "I/O Modules" section, and Table 1-2 • I/O Features have been updated. 1-8

The "SX-A Timing Model" section and the "Timing Characteristics" section have new timing

numbers.

1-23

Previous Version Changes in Current Version (v5.1) Page

SX-A Family FPGAs

v5.1 4-3

Datasheet Categories

In order to provide the latest information to designers, some datasheets are published before data has been fully

characterized. Datasheets are designated as "Product Brief," "Advanced," "Production," and "Datasheet

Supplement." The definitions of these categories are as follows:

Product Brief

The product brief is a summarized version of a datasheet (advanced or production) containing general product

information. This brief gives an overview of specific device and family information.

Advanced

This datasheet version contains initial estimated information based on simulation, other products, devices, or speed

grades. This information can be used as estimates, but not for production.

Unmarked (production)

This datasheet version contains information that is considered to be final.

Datasheet Supplement

The datasheet supplement gives specific device information for a derivative family that differs from the general family

datasheet. The supplement is to be used in conjunction with the datasheet to obtain more detailed information and

for specifications that do not differ between the two families.

International Traffic in Arms Regulations (ITAR) and Export

Administration Regulations (EAR)

The products described in this datasheet are subject to the International Traffic in Arms Regulations (ITAR) or the

Export Administration Regulations (EAR). They may require an approved export license prior to their export. An export

can include a release or disclosure to a foreign national inside or outside the United States.

5172147-8/02.05

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Actel and the Actel logo are registered trademarks of Actel Corporation.

All other trademarks are the property of their owners.

Actel Corporation

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Phone 650.318.4200

Fax 650.318.4600

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Actel and the Actel logo are registered trademarks of Actel Corporation.

All other trademarks are the property of their owners.