SY89547LMGTR - Micrel, Inc.

Precision Edge®

SY89547L

Micrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

DESCRIPTION

■Selects among four differential inputs

■Provides two copies of the selected input

■Guaranteed AC performance over temp and voltage:

• DC-to > 3.2Gbps data rate throughput

• < 620ps In-to-Out tpd

• < 150ps tr/tf

■Unique input isolation design minimizes crosstalk

■Ultra-low jitter design:

• < 1psRMS random jitter

• < 10psPP deterministic jitter

• < 10psPP total jitter (clock)

• < 0.7psRMS crosstalk-induced jitter

■Internal input termination

■Unique input termination and VT pin accepts DC-

coupled and AC-coupled inputs (LVDS, LVPECL,

CML)

■350mV LVDS output swing

■Power supply 3.3V ±10%

■–40°C to +85°C temperature range

■Available in 32-pin (5mm x 5mm) MLF® package

FEATURES

3.3V, 3.2Gbps DIFFERENTIAL 4:1 LVDS

MULTIPLEXER with 1:2 FANOUT and

INTERNAL TERMINATION

Precision Edge®

SY89547L

APPLICATIONS

■SONET/SDH multi-channel select applications

■Fibre Channel applications

■GigE applications

Rev.: D Amendment: /0

Issue Date:

September 2009

The SY89547L is a precision, high-speed 4:1 differential

multiplexer that provides two copies of the selected input.

The high speed LVDS (350mV) compatible outputs with a

guaranteed throughput of up to 3.2Gbps over temperature

and voltage.

The SY89547L differential inputs include Micrel’s unique,

3-pin internal termination design that allows access to the

termination network through a VT pin. This feature allows

the device to easily interface to different logic standards,

both AC- and DC-coupled without external resistor-bias and

termination networks. The result is a clean, stub-free, low

jitter interface solution.

The SY89547L operates from a single 3.3V supply, and

is guaranteed over the full industrial temperature range

(–40°C to +85°C). For applications that require a 2.5V supply,

consider the SY89546U. For applications that only require

one differential output, consider the SY89544U or SY89545L.

The SY89547L is part of a Micrel’s Precision Edge® product

family. All support documentation can be found on Micrel’s

web site at: www.micrel.com.

TYPICAL PERFORMANCE

FUNCTIONAL BLOCK DIAGRAM

Precision Edge®

IN0

/IN0

50Ω

IN1

/IN1

50Ω

50ΩQ0

/Q0

MUX

4:1 MUX

1:2 Fanout

LVDS

IN2

/IN2

50Ω

IN3

/IN3

50Ω

3S0 S1

SEL0 (CMOS/TTL)

SEL1 (CMOS/TTL)

/Q1

Precision Edge is a registered trademark of Micrel, Inc.

Micro

LeadFrame and MLF are registered trademarks of Amkor Technology, Inc.

100

150

200

250

300

350

400

0 1000 2000 3000 4000 5000 6000

OUTPUT AMPLITUDE (mV)

FREQUENCY (MHz)

Output Amplitude

vs. Frequency

Precision Edge®

SY89547LMicrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

Pin Number Pin Name Pin Function

4, 2, 32, IN0, /IN0, Differential Inputs: These input pairs are the differential signal inputs to the device. Inputs

30, 27, 25, 23, 21 IN1, /IN1, accept AC- or DC-coupled signals as small as 100mV. Each pin of a pair internally

IN2, /IN2, terminates to a VT pin through 50Ω. Note that these inputs will default to an indeterminate

IN3, /IN3 state if left open. Unused differential input pairs can be terminated by connecting one input

to VCC and the complementary input to GND through a 1kΩ resistor. The VT pin is to be

left open in this configuration. Please refer to the “Input Interface Applications” section for

more details.

3, 31, 26, 22 VT0, VT1, Input Termination Center-Tap: Each side of the differential input pair, terminates to a VT

VT2, VT3 pin. The VTA0, VTA1, VTB0, VTB1 pins provide a center-tap to a termination network for

maximum interface flexibility. See “Input Interface Applications” section for more details.

6, 19 SEL0, SEL1 These single-ended TTL/CMOS-compatible inputs select the inputs to the multiplexers.

Note that these inputs are internally connected to a 25kΩ pull-up resistor and will default

to a logic HIGH state if left open. Input switching threshold is VCC/2.

1, 5, 8, VCC Positive Power Supply: Bypass with 0.1µF||0.01µF low ESR capacitors.

17, 20, 24, 28, 29

10, 11, 14, 15 Q0, /Q0, Differential Outputs: These LVDS output pairs are the outputs of the device. They are a

Q1, /Q1 logic function of the INA0, INA1, INB0, INB1 and SELA and SELB inputs. Please refer to

the “Truth Table’” for details. If an output is not used, it must be terminated with 100Ω

across the differential pair.

7, 9, 12, 13, 16, 18 GND, Ground: Ground pin and exposed pad must be connected to the same ground plane.

Exposed pad

PIN DESCRIPTION

PACKAGE/ORDERING INFORMATION

VCC

IN3

VT3

/IN3

VCC

SEL1

GND

VCC

/IN0

VT0

IN0

VCC

SEL0

GND

VCC

910111213141516

32 31 30 29 28 27 26 25

VCC

/IN1

VT1

IN1

IN2

VT2

/IN2

GND

/Q0

GND

/Q1

GND

32-Pin MLF®

Ordering Information(1)

Package Operating Package Lead

Part Number Type Range Marking Finish

SY89547LMI MLF-32 Industrial SY89547L Sn-Pb

SY89547LMITR(2) MLF-32 Industrial SY89547L Sn-Pb

SY89547LMG(3) MLF-32 Industrial SY89547L with Pb-Free

Pb-Free bar-line indicator NiPdAu

SY89547LMGTR(2, 3) MLF-32 Industrial SY89547L with Pb-Free

Pb-Free bar-line indicator NiPdAu

Notes:

1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only.

2. Tape and Reel.

3. Recommended for new designs.

Precision Edge®

SY89547L

Micrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

Absolute Maximum Ratings(1)

Supply Voltage (VCC) ............................... – 0.5V to + 4.0V

Input Voltage (VIN) ........................................ –0.5V to VCC

Termination Current(3)

Source or sink current on VT.....................................±100mA

Input Current

Source or sink current on IN, /IN..........................±50mA

Lead Temperature (soldering, 20 sec.) ................... +260°C

Storage Temperature (TS) ...................... –65°C to +150°C

Operating Ratings(2)

Supply Voltage (VCC) ..................................... 3.0V to 3.6V

Ambient Temperature (TA)........................ –40°C to +85°C

Package Thermal Resistance(4)

MLF® (θJA)

Still-Air................................................................ 35°C/W

500lfpm .............................................................. 28°C/W

MLF® (ΨJB)

Junction-to-Board............................................... 20°C/W

TA = –40°C to +85°C; Unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

VCC Power Supply 3.0 3.3 3.6 V

ICC Power Supply Current No Load, Max. VCC(6) 68 90 mA

RDIFF_IN Differential Input Resistance 80 100 120 Ω

(IN-to-/IN)

RIN Input Resistance 40 50 60 Ω

(IN-to-VT, /IN-to-VT)

VIH Input High Voltage 1.2 VCC V

(IN, /IN)

VIL Input Low Voltage 0 VIH–0.1 V

(IN, /IN)

VIN Input Voltage Swing Note 7 0.1 VCC V

(IN, /IN)

VDIFF_IN Differential Input Voltage Swing Note 7 0.2 V

| IN - /IN |

IN-to-VTNote 7 1.8 V

Notes:

1. Permanent device damage may occur if “Absolute Maximum Ratings” are exceeded. This is a stress rating only and functional operation is not

implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to “Absolute Maximum Ratings” conditions

for extended periods may affect device reliability.

2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.

3. Due to the limited drive capability use for input of the same package only.

4. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the device’s most negative potential (GND) on the PCB. ΨJB uses

4-layer θJA in still-air unless otherwise stated.

5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.

6. Includes current through internal 50Ω pull-ups.

7. See “Operating Characteristics” section for VIN and VDIFF_IN definition.

DC ELECTRICAL CHARACTERISTICS(5)

Precision Edge®

SY89547LMicrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

VCC = 3.3V ±10%; TA = –40°C to +85°C; RL = 100Ω across Q and /Q, unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

VOH Output HIGH Voltage See Figure 5a 1.475 V

(Q, /Q)

VOL Output LOW Voltage See Figure 5a 0.925 V

(Q, /Q)

VOUT Output Voltage Swing See Figures 1a, 5a 250 350 mV

(Q, /Q)

VDIFF-OUT Differential Output Voltage Swing See Figure 1b 500 700 mV

| Q - /Q|

VOCM Output Common Mode Voltage See Figure 5b 1.125 1.275 V

(Q, /Q)

∆VOCM Change in Common Mode Voltage See Figure 5b –50 +50 mV

(Q, /Q)

LVDS OUTPUTS DC ELECTRICAL CHARACTERISTICS(9)

VCC = 3.3V ±10%; TA = –40°C to +85°C; unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

VIH Input HIGH Voltage 2.0 VCC V

VIL Input LOW Voltage 0.8 V

IIH Input HIGH Current 40 µA

IIL Input LOW Current –300 µA

Note:

9. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.

LVTTL/CMOS DC ELECTRICAL CHARACTERISTICS(9)

Precision Edge®

SY89547L

Micrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

VCC = 3.3V ±10%; TA = –40°C to +85°C; RL = 100Ω across Q and /Q, unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

fMAX Maximum Operating Frequency NRZ Data 3.2 Gbps

VOUT ≥ 200mV Clock 4 GHz

tpd Differential Propagation Delay IN-to-Q 340 440 540 ps

SEL-to-Q 200 420 700 ps

tSKEW Input-to-Input Skew Note 11 520ps

Output-to-Output Skew Note 12 820ps

Part-to-Part Skew Note 13 200 ps

tJITTER Data Random Jitter (RJ) Note 14 1ps

RMS

Deterministic Jitter (DJ) Note 15 10 psPP

Clock Total Jitter (TJ) Note 16 10 psPP

Cycle-to-Cycle Jitter Note 17 1ps

RMS

Crosstalk Crosstalk-Induced Jitter Note 18 0.7 psRMS

tR, tFOutput Rise / Fall Time At full output swing 40 80 150 ps

(20% to 80%)

Notes:

10. Measured with 100mV input swing. See “Timing Diagrams” section for definition of parameters. High frequency AC parameters are guaranteed by

design and characterization.

11. Input-to-input skew is the difference in time from an input-to-output in comparison to any other input-to-output. In addition, the input-to-input skew

does not include the output skew.

12. Output-to-output skew is measured between two different outputs under identical input transitions.

13. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the

respective inputs. Total skew is calculated as the RMS (Root Mean Square) of the input skew and output skew.

14. RJ is measured with a K28.7 comma detect character pattern, measured at 1.25Gbps and 3.2Gbps.

15. DJ is measured at 1.25Gbps and 3.2Gbps, with both K28.5 and 223–1 PRBS pattern.

16. Total jitter definition: with an ideal clock input of frequency ≤fMAX, no more than one output edge in 1012 output edges will deviate by more than the

specified peak-to-peak jitter value.

17. Cycle-to-cycle jitter definition: the variation of periods between adjacent cycles, Tn-Tn-1 where T is the time between rising edges of the output

signal.

18. Crosstalk is measured at the output while applying two similar clock frequencies to adjacent inputs that are asynchronous with respect to each other

at the inputs.

AC ELECTRICAL CHARACTERISTICS(10)

Precision Edge®

SY89547LMicrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

IN0 IN1 IN2 IN3 SEL0 SEL1 Q /Q

0XXX 0001

1XXX 0010

X0XX 1001

X1XX 1010

XX0X 0101

XX1X 0110

XXX0 1101

XXX1 1110

SINGLE-ENDED AND DIFFERENTIAL SWINGS

OUT

350mV (Typ.)

Figure 1a. Single-Ended Voltage Swing

DIFF_IN

DIFF_OUT

700mV (Typ.)

Figure 1b. Differential Voltage Swing

TIMING DIAGRAM

/IN

SEL SEL-to-Q

Figure 2. Timing Diagram

TRUTH TABLE

Precision Edge®

SY89547L

Micrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

FUNCTIONAL CHARACTERISTICS

200MHz Output

TIME (600ps/div.)

Output Swing

(100mV/div.)

1.6GHz Output

TIME (80ps/div.)

Output Swing

(100mV/div.)

2.5GHz Output

TIME (50ps/div.)

Output Swing

(100mV/div.)

3.2GHz Output

TIME (40ps/div.)

Output Swing

(100mV/div.)

2.5Gbps Mask

Ð1 PRBS)

TIME (100ps/div.)

Output Swing

(100mV/div.)

VCC = 3.3V, GND = 0V, VIN = 100mV, TA = 25°C.

622Mbps Mask

Ð1 PRBS)

TIME (400ps/div.)

Output Swing

(100mV/div.)

Precision Edge®

SY89547LMicrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

FUNCTIONAL CHARACTERISTICS

3.2Gbps Data Output (223—1 PRBS)

TIME (80ps/div.)

Output Swing

(100mV/div.)

VCC = 3.3V, GND = 0V, VIN = 100mV, TA = 25°C.

Precision Edge®

SY89547L

Micrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

INPUT AND OUTPUT STAGE INTERNAL TERMINATION

50Ω

GND

/IN

Figure 3. Simplified Differential Input Stage

INPUT INTERFACE APPLICATIONS

LVPECL

/IN

SY89547L

VCC

GND

For VCC = 3.3V, Rp = 100Ω

GND

VCC

—

1.4V

Figure 4d. LVPECL

Interface (AC-Coupled)

LVDS IN

/IN

SY89547L

VCC

GND VT

Figure 4e. LVDS Interface

CML IN

/IN

SY89547L

VCC

GND

Figure 4a. CML

Interface (DC-Coupled)

LVPECL

/IN

SY89547L

0.01µF

For V

= 3.3V, R

= 50Ω

GND V

Figure 4c. LVPECL

Interface (DC-Coupled)

CML IN

/IN

SY89547L

VCC

GNDVCC

—

1.4V

GND

Figure 4b. CML

Interface (AC-Coupled)

Precision Edge®

SY89547LMicrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

OUTPUT INTERFACE APPLICATIONS

LVDS specifies a small swing of 350mV typical, on a

nominal 1.25V common mode above ground. The common

mode voltage has tight limits to permit large variations in

ground between an LVDS driver and receiver. Also, change

in common mode voltage, as a function of data input, is

kept to a minimum, to keep EMI low.

100ΩV

OUT

GND

, V

Figure 5a. LVDS Differential Measurement

GND

OCM

Figure 5b. LVDS Common Mode Measurement

RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION

Part Number Function Data Sheet Link

SY89542U 2.5 V, 3.2Gbps Dual, Differential 2:1 LVDS http://www.micrel.com/_PDF/HBW/sy89542u.pdf

Multiplexer with Internal Input Termination

SY89543L 3.3V, 3.2Gbps Dual, Differential 2:1 LVDS http://www.micrel.com/_PDF/HBW/sy89543l.pdf

Multiplexer with Internal Input Termination

SY89544U 2.5V, 3.2Gbps, Differential 4:1 LVDS Multiplexer http://www.micrel.com/_PDF/HBW/sy89544u.pdf

with Internal Input Termination

SY89545L 3.3V, 3.2Gbps 4:1 LVDS Multiplexer with Internal http://www.micrel.com/_PDF/HBW/sy89545l.pdf

Input Termination

SY89546U 2.5V, 3.2Gbps, Differential 4:1 LVDS Multiplexer http://www.micrel.com/_PDF/HBW/SY89546u.pdf

with 1:2 Fanout and Internal Termination

MLF® Application Note www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf

HBW Solutions New Products and Applications www.micrel.com/product-info/products/solutions.shtml

Precision Edge®

SY89547L

Micrel, Inc.

M9999-091809

hbwhelp@micrel.com or (408) 955-1690

MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com

The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.

Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can

reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into

the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s

use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify

Micrel for any damages resulting from such use or sale.

Package

EP- Exposed Pad

Die

CompSide Island

Heat Dissipation

Heavy Copper Plane

VEE

Heat Dissipation

PCB Thermal Consideration for 32-Pin MLF® Package

(Always solder, or equivalent, the exposed pad to the PCB)

Package Notes:

1. Package meets Level 2 qualification.

2. All parts are dry-packaged before shipment.

3. Exposed pads must be soldered to a ground for proper thermal management.

32-PIN

Micro

LeadFrame® (MLF-32)