2K x 8 Reprogrammable PROM
CY7C291A
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document #: 38-04011 Rev. *B Revised August 17, 2006
Features
• Windowed for reprogrammability
• CMOS for optimum speed/power
• High speed
— 20 ns (Commercial)
— 35 ns (Milit ary)
• Low power
— 660 mW (Commercial and Military)
• Low standby power
— 220 mW (Commercial and Military)
• EPROM technology 100% programma ble
• Slim 300-mil or standard 600-mil packaging available
•5V ±10% VCC, commercial and military
• TTL-compatible I/O
• Direct replacement for bipolar PROMs
• Capable of withstanding >2001V static discharge
Functional Description
The CY7C291A is a high-performance 2K-word by 8-bit
CMOS PROM. It is packaged in a 300-mil ceramic package
which may be equipped with an erasure window; when
exposed to UV light the PROM is erased and can then be
reprogrammed. The memory cells utilize proven EPROM
floating-gate technology and byte-wide intelligent
programming algorithms.
The CY7C291A is a plug-in replacement for bipolar devices
and offers the advantage of lower power, reprogrammability,
superior performance and programming yield. The EPROM
cell requires only 12.5V for the supervo ltage and low current
requirements allow for gang progra mmi ng. The EPROM cells
allow for each memory location to be tested 100%, as each
location is written into, erased, and repeatedly exercised prior
to encapsulation. Each PROM is also tested for AC perfor-
mance to guarantee that after customer programming the
product will meet DC and AC specification limits.
A read is accomplished by placing an active LOW signal on
CS1, and active HIGH signals on CS2 and CS3. The conte nts
of the memory location addressed by the address line
(A0−A10) will become available on the output lines (O0−O7).
LogicBlockDiagram Pin Configurations
O7
O6
O5
O4
O3
O2
O1
O0
PROGRAM-
MABLE
ARRAY
MULTI-
PLEXER
GND
1
2
3
4
5
6
7
8
9
10
11 14
15
16
20
19
18
17
21
24
23
22
A6
A5
A4
A3
A2
A1
A0
O0
A7
O3
VCC
A8
A9
A10
O7
O6
O5
O4
CS1
O212 13
O1
CS3
CS2
28
4
5
6
7
8
9
10
321 27
1314151617
26
25
24
23
22
21
20
1112 19
A5
V
CC
GND A6
A7
O3
O1
O018
O4
O5
NC
A0
A4
A3
A10
NC
A8
A9
NC
NC
CS1
CS2
O7
O6
A2
A1CS3
O2
CS1
CS2
CS3
POWER
DOWN
7C293A Window available
DIP LCC/PLCC (Opaque Only)
Top View Top View
ADDRESS
DECODER
A0
A1
A2
A3
A4
A5
A6
A8
A9
A10
A7
COLUMN
ADDRESS
ROW
ADDRESS
7C291A
7C291A
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CY7C291A
Document #: 38-04011 Rev. *B Page 2 of 13
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature ...................................... −65°C to +150°C
Ambient Temperature with
Power Applied................................................... −55°C to +125°C
Supply Voltage to Ground Potential..................−0.5V to +7.0V
DC Voltage Appli ed to Outputs
in High Z State......................................................−0.5V to +7.0V
DC Input V oltage.................................................−3.0V to +7.0V
DC Program Voltage............ .............. ... .............. ... .......13.0V
UV Exposure .................. .. ............................7258 Wsec/cm2
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current.....................................................>200 mA
Selection Guide
7C291A-20 7C291A-25 7C291A-35
7C291AL-35 7C291A-50 Unit
Maximum Access Time 20 25 35 50 ns
Maximum
Operating
Current
Standard Commercial 120 90 90 90 mA
Military 90 mA
LCommercial 60 mA
Operating Range
Range Ambient
Temperature VCC
Commercial 0°C to + 70°C 5V ±10%
Military[1] −55°C to + 125°C 5V ±10%
Note
1. TA is the “ instant on” case temperat ure.
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CY7C291A
Document #: 38-04011 Rev. *B Page 3 of 13
Electrical Characteristics Over the Operating Range[2, 3]
7C291A-20 7C291A-25
Parameter Description Test Conditions Min. Max. Min. Max. Unit
VOH Output HIGH Voltage VCC = Min., IOH = −4.0 mA 2.4 2.4 V
VOL Output LOW Voltage VCC = Min., IOL = 16.0 mA 0.4 0.4 V
VIH Input HIGH Voltage Guaranteed Input Logical
HIGH Voltage for All Inputs 2.0 VCC 2.0 VCC V
VIL Input LOW Voltage Guaranteed Input Logical
LOW Voltage for All Inputs 0.8 0.8 V
IIX Input Load Current GND < VIN < VCC −10 +10 −10 +10 µA
VCD Input Diode Clamp Voltage Note 3
IOZ Output Leakage Current GND < VOUT < VCC,
Output Disabled −10 +10 −10 +10 µA
IOS Output Short Circuit
Current[4] VCC = Max., VOUT = GND −20 −90 −20 −90 mA
ICC VCC Operating Supp ly
Current VCC = Max.,
IOUT = 0 mA Com’l 120 90 mA
ISB Standby Supply Current
(7C293A Only) VCC = Max.,
CS1 = VIH Com’l 40 30 mA
VPP Programming Supply V oltage 12 13 12 13 V
IPP Programming Supply Current 50 50 mA
VIHP Input HIGH Programming
Voltage 3.0 3.0 V
VILP Input LOW Programming
Voltage 0.4 0.4 V
Notes
2. See the last page of this specification for Group A subgroup testing information.
3. See the “Introduction to CMOS PROMs” section of the Cypress Data Book for general information on testing.
4. For test purposes, not more than one output at a time should be shorted. Short circuit test duration should not exceed 30 seconds.
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CY7C291A
Document #: 38-04011 Rev. *B Page 4 of 13
Electrical Characteristics Over the Operating R ange[2, 3] (conti nued)
7C291AL-35 7C291A-35
7C291A-50
Parameter Description Test Conditions Min. Max. Min. Max. Unit
VOH Output HIGH Voltage VCC = Min., IOH = −4.0 mA 2.4 2.4 V
VOL Output LOW Voltage VCC = Min., IOL = 16.0 mA 0.4 0.4 V
VIH Input HIGH Voltage Guaranteed Input Logical
HIGH Voltage for All Inputs 2.0 2.0 V
VIL Input LOW Voltage Guaranteed Input Logical
LOW Voltage for All Inputs 0.8 0.8 V
IIX Input Load Current GND < VIN < VCC −10 +10 −10 +10 µA
VCD Input Diode Clamp Voltage Note 3
IOZ Output Leakage Current GND < VOUT < VCC,
Output Disabled −10 +10 −10 +10 µA
IOS Output Short Circuit Current [4] VCC = Max., VOUT = GND −20 −90 −20 −90 mA
ICC VCC Operating Suppl y Current VCC = Max.,
VIN = 2.0V
IOUT = 0 mA
Commercial 60 90 mA
Military 90
ISB Standby Supply Current
(7C293A Only) VCC = Max.,
CS1 = VIH Commercial 30 30 mA
Military 40
VPP Programming Supply Voltage 12 13 12 13 V
IPP Programming Supply Cu rrent 50 50 mA
VIHP Input HIGH Programming V olt age 3.0 3.0 V
VILP Input LOW Programming Voltage 0.4 0.4 V
Capacitance[3]
Parameter Description Test Conditions Max. Unit
CIN Input Capacitance TA = 25°C, f = 1 MHz,
VCC = 5.0V 10 pF
COUT Output Capacit a nce 10 pF
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CY7C291A
Document #: 38-04011 Rev. *B Page 5 of 13
AC Test Loads and Waveforms[3]
tPU
tAA tHZCS tACS
50% 50%
tPD
3.0V
5V
OUTPUT
R1250Ω
R2
167Ω
30pF
INCLUDING
JIG AND
SCOPE
GND
90%
10%
90%
10%
<5ns <5ns
5V
OUTPUT
5pF
INCLUDING
JIG AND
SCOPE
(a) Normal Load (b) HighZ Load
OUTPUT 2.0V
Equivalent to: THÉ VENINEQUIVALENT
100Ω
R1250Ω
R2
167Ω
ALL INPUT PULSES
CS2−CS3
CS1
VCC
SUPPLY
CURRENT
A0−A10
ADDRESS
O0–O7
Switching Characteristics Over the Operating Range[2, 3]
7C291A-20 7C291A-25 7C291A-35
7C291AL-35 7C291A-50
Parameter Description Min. Max. Min. Max. Min. Max. Min. Max. Unit
tAA Address to Output Valid 20 25 35 50 ns
tHZCS1 Chip Select Inactive to High Z 15 15 20 20 ns
tACS1 Chip Select Active to Output Valid 15 15 20 20 ns
tHZCS2 Chip Select Inactive to High Z 22 27 35 45 ns
tACS2 Chip Select Active to Output Valid 22 27 35 45 ns
tPU Chip Select Active to Power-Up 0 0 0 0 ns
tPD Chip Select Inactive to Power-Down 22 27 35 45 ns
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CY7C291A
Document #: 38-04011 Rev. *B Page 6 of 13
Erasure Characteristics
W avelengths of light less than 4000 Angstroms begin to erase
these PROMs. For this reason, an opaque label should be
placed over the window if the PROM is exposed to sunlight or
fluorescent lighting for extended periods of time.
The recommended dose of ultraviolet light for erasure is a
wavelength of 2537 Angstroms for a minimum dose (UV
intensity x exposure time) of 25 Wsec/cm2. For an ultraviolet
lamp with a 12 mW/cm2 power rating, the exposure time would
be approximately 35 minutes.
These PROMs need to be within 1 inch of the lamp during
erasure. Permanent damage may result if the PROM is
exposed to high-intensity UV light for an extended period of
time. 7258 Wsec/cm2 is the recommended maximum dosage.
Programming Information
Programming support is available from Cypress as well as
from a number of third-party software vendors. For detailed
programming information, including a listing of software
packages, please see the PROM Programming Information
located at the end of this section. Programming algorithms can
be obtained from any Cypress representative.
Figure 1. Programming Pinouts
Table 1. Mode Selection
Pin Functi on[5]
Read or Output Disable A10−A0CS3CS2CS1O7−O0
Mode Other A10−A0PGM VFY VPP D7−D0
Read A10−A0VIH VIH VIL O7−O0
Output Disable[6] A10−A0X X VIH High Z
Output Disable A10−A0X VIL XHigh Z
Output Disable A10−A0VIL X X High Z
Program A10−A0VILP VIHP VPP D7−D0
Program Verify A10−A0VIHP VILP VPP O7−O0
Program Inhibit A10−A0VIHP VIHP VPP High Z
Intelligent Program A10−A0VILP VIHP VPP D7−D0
Blank Check Zeros A10−A0VIHP VILP VPP Zeros
Notes
5. X = “don’t care” but not to exceed VCC +5%.
6. The power-down mode for the CY7C293A is activated by deselecting CS1.
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
24
23
22
21
13
14
A8
A7
A6
A5
A4
A3
A2
A1
A0
D0
D1
D2
GND
VCC
D7
D6
D4
D5
D3
15
A9
A10
VPP
VFY
PGM
28
4
5
6
7
8
9
10
321 27
1314151617
26
25
24
23
22
21
20
1112 19
A5
V
CC
GND A6
A7
D3
D1
D018
D4
D5
NC
A0
A4
A3
A8
NC
NC
D7
D6
A2
A1
D2
A10
VPP
VFY
PGM
NC
A9
DIP LCC/PLCC (Opaque Only)
Top View Top View
7C291A
7C291A
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CY7C291A
Document #: 38-04011 Rev. *B Page 7 of 13
Typical DC and AC Characteristics
1.4
1.6
1.0
0.8
4.0 4.5 5.0 5.5 6.0 −55 25 125
1.2
1.1
1.2
1.0
0.8
0.6
4.0 4.5 5.0 5.5 6.0
NORMALIZED ACCESS TIME
SUPPLY VOLTAGE (V)
NORMALIZED SUPPLYCURRENT
vs. SUPPLY VOLTAGE NORMALIZED SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
AMBIENT TEMPERATURE (°C) SUPPLY VOLTAGE (V)
NORMALIZED ACCESSTIME
vs.SUPPLY VOLTAGE
0.6
1.2 1.0
0.9
0.8
NORMALIZED I CC
NORMALIZED I
CC
TA=25°C
0.4
TA=25°C
f= f
MAX
1.6
1.4
1.2
1.0
0.8
−55 125
NORMALIZED ACCESS TIME
AMBIENT TEMPERATURE (°C)
NORMALIZED ACCESSTIME
vs.TEMPERATURE
0.6
60
50
40
30
20
10
0 1.0 2.0 3.0
OUTPUT SOURCE CURRENT (mA)
OUTPUT VOLTAGE (V)
30.0
25.0
20.0
15.0
10.0
5.0
0 200 400 600 800
DELTA t (ns)
AA
CAPACITANCE (pF)
TYPICAL ACCESSTIME CHANGE
vs.OUTPUT LOADING
4.0 0.0 1000
VCC =4.5V
TA=25°C
25 0
OUTPUT SOURCE CURRENT
vs.VOLTAGE
150
175
125
75
50
25
0.0 1.0 2.0 3.0
OUTPUT SINK CURRENT (mA)
0
100
OUTPUT VOLTAGE (V)
OUTPUT SINK CURRENT
vs.OUTPUT VOLTAGE
VCC =5.0V
TA=25°C
4.0
1.00
1.02
0.98
0.94
0.92
0.90
025 5075
100
0.88
0.96
ICC vs.CYCLEPERIOD
CYCLE PERIOD (ns)
NORMALIZED I
CC
VCC =5.5V
TA=25°C
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CY7C291A
Document #: 38-04011 Rev. *B Page 8 of 13
MILITARY SPECIFICATIONS
Group A Subgroup Testing
Ordering Information
Speed
(ns) ICC
(mA) Ordering Code Package
Name Package Type Operating
Range
20 120 CY7C291A-20PC P13 24-Lead (300-Mil) Molded DIP Commercial
25 90 CY7C291A-25JC J64 28-Lead Plastic Leaded Chip Carrier Commercial
CY7C291A-25PC P13 24-Lead (300-Mil) Molded DIP
35 60 CY7C291AL-35JC J64 28-Lead Plastic Leaded Chip Carrier Commercial
CY7C291AL-35PC P13 24-Lead (300-Mil) Molded DIP
CY7C291AL-35WC W14 24-Lead (300-Mil) Windowed CerDIP
90 CY7C291A-35JC J64 28-Lead Plastic Leaded Chip Carrier Commercial
CY7C291A-35PC P13 24-Lead (300-Mil) Molded DIP
CY7C291A-35WC W14 24-Lead (3 00-Mil) Windowed CerDIP
120 CY7C291A-35DMB D14 24-Lead (300-Mil) CerDIP Military
50 90 CY7C291A-50PC P13 24-Lead (300-Mil) Molded DIP Commercial
CY7C291A-50WMB W14 24-Lead (3 00-Mil) Windowed CerDIP Military
DC Characteristics
Parameter Subgroups
VOH 1, 2, 3
VOL 1, 2, 3
VIH 1, 2, 3
VIL 1, 2, 3
IIX 1, 2, 3
IOZ 1, 2, 3
ICC 1, 2, 3
ISB 1, 2, 3
Switching Characteristics
Parameter Subgroups
tAA 7, 8, 9, 10, 11
tACS1 7, 8, 9, 10, 11
SMD Cross Reference
SMD
Number Suffix Cypress
Number
5962-87650 01LX CY7C291-50WMB
5962-87650 03LX CY7C291-35WMB
5962-88734 023X CY7C291A-35LMB
5962-88734 033X CY7C291A-35LMB
5962-88734 04LX CY7C291A-25DMB
5962-88734 043X CY7C291A-25LMB
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CY7C291A
Document #: 38-04011 Rev. *B Page 11 of 13
Figure 5. 24 Lead (300 Mil) SOIC - S13
Package Diagrams (continued)
PIN 1 ID
SEATING PLANE
0.597[15.163]
0.615[15.621]
112
13 24
*
*
*
0.291[7.391]
0.300[7.620]
0.394[10.007]
0.419[10.642]
0.050[1.270]
TYP.
0.092[2.336]
0.105[2.667]
0.004[0.101]
0.0118[0.299]
0.0091[0.231]
0.0125[0.317]
0.015[0.381]
0.050[1.270]
0.013[0.330]
0.019[0.482]
0
.026[0.66
0
]
0.032[0.812]
0.004[0.101]
PART #
S24.3 STANDARD PKG.
SZ24.3 LEAD FREE PKG.
MIN.
MAX.
NOTE :
1. JEDEC STD REF MO-119
2. BODY LENGTH DIMENSION DOES NOT INCLUDE MOLD PROTRUSION/END FLASH,BUT
MOLD PROTRUSION/END FLASH SHALL NOT EXCEED 0.010 in (0.254 mm) PER SIDE
3. DIMENSIONS IN INCHES
4. PACKAGE WEIGHT 0.65gms
DOES INCLUDE MOLD MISMATCH AND ARE MEASURED AT THE MOLD PARTING LINE.
51-85025-*C
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CY7C291A
Document #: 38-04011 Rev. *B Page 12 of 13
© Cypress Semi con duct or Cor po rati on , 20 06 . The information contained he re i n is su bject to change wit hou t n oti ce. C ypr ess S em ic on duct or Cor po rati on assu me s no resp onsi b i lity f or th e u s e
of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be
used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its
products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypre ss
products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
Figure 6. 24-Lead (300-Mil) Windowed CerDIP W14
All product and company names mentioned in this document may be the trademarks of their respective holders.
Package Diagrams (continued)
51-80086-**
MIL-STD-1835 D-9 Config. A
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CY7C291A
Document #: 38-04011 Rev. *B Page 13 of 13
Document History Page
Document Title: CY7C291A 2K x 8 Reprogrammable PROM
Document Number: 38-04011
REV. ECN NO. Issue
Date Orig. of Change Description of Chang e
** 114138 03/18/02 DSG Changed from Spec number: 38-00075 to 38-04011
*A 118905 10/11/02 GBI Updated ordering information
*B 499562 See ECN PCI Updated ordering information
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