92A
CY7C291A
2K x 8 Reprogrammable PROM
Features
• Windowed for reprogrammability
• CMOS for optimum speed/power
• High speed
— 20 ns (Commercial)
•
•
•
•
•
•
•
•
— 35 ns (Military)
Low power
— 660 mW (Commercial and Military)
Low standby power
— 220 mW (Commercial and Military)
EPROM technology 100% programmable
Slim 300-mil or standard 600-mil packaging available
5V
±10%
V
CC
, 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 supervoltage and low current
requirements allow for gang programming. 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
CS
1
, and active HIGH signals on CS
2
and CS
3
. The contents
of the memory location addressed by the address line
(A
0
−A
10
) will become available on the output lines (O
0
−O
7
).
Logic Block Diagram
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
O
3
A
8
A
9
A
10
COLUMN
ADDRESS
POWER
DOWN
7C293A
O
2
O
1
ADDRESS
DECODER
O
4
ROW
ADDRESS
PROGRAM-
MABLE
ARRAY
MULTI-
PLEXER
O
6
O
7
Pin Configurations
DIP
Top View
A
7
A
6
O
5
A
5
A
4
A
3
A
2
A
1
A
0
O
0
O
1
O
2
GND
1
24
2
23
3 7C291A 22
4
21
5
20
6
19
18
7
8
17
9
16
10
15
11
14
12
13
V
CC
A
8
A
9
A
10
CS
1
CS
2
CS
3
O
7
O
6
O
5
O
4
O
3
LCC/PLCC (Opaque Only)
Top View
A5
A6
A7
NC
V
CC
A8
A9
A
4
A
3
A
2
A
1
A
0
NC
O
0
4 3 2 1 28 27 26
25
5
24
6
7C291A
23
7
22
8
21
9
20
10
19
11
12 1314151617 18
O1
O2
GND
NC
O3
O4
O5
A
10
CS
1
CS
2
CS
3
NC
O
7
O
6
O
0
CS
1
CS
2
CS
3
Window available
Cypress Semiconductor Corporation
Document #: 38-04011 Rev. *A
•
3901 North First Street
•
San Jose
•
CA 95134 • 408-943-2600
Revised October 8, 2002
CY7C291A
Selection Guide
7C291A-20
Maximum Access Time
Maximum
Operating
Current
Standard
Commercial
Military
L
Commercial
20
120
7C291A-25
25
90
7C291A-35
7C291AL-35
35
90
90
60
7C291A-50
50
90
Unit
ns
mA
mA
mA
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 Applied to Outputs
in High Z State
......................................................−0.5V
to+7.0V
DC Input Voltage
.................................................−3.0V
to +7.0V
DC Program Voltage .....................................................13.0V
UV Exposure.................................................7258 Wsec/cm
2
Static Discharge Voltage............................................ >2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current..................................................... >200 mA
Operating Range
Range
Commercial
Military
[1]
Ambient
Temperature
0
°
C to + 70
°
C
−55
°
C to + 125
°
C
V
CC
5V
±10%
5V
±10%
Notes:
1. T
A
is the “instant on” case temperature.
Document #: 38-04011 Rev. *A
Page 2 of 12
CY7C291A
Electrical Characteristics
Over the Operating Range
[2,3]
7C291A-20
Parameter
V
OH
V
OL
V
IH
V
IL
I
IX
V
CD
I
OZ
I
OS
I
CC
I
SB
V
PP
I
PP
V
IHP
V
ILP
Description
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input Load Current
Input Diode Clamp Voltage
Output Leakage Current
Output Short Circuit
Current
[4]
V
CC
Operating Supply
Current
Standby Supply Current
(7C293A Only)
Programming Supply Voltage
Programming Supply Current
Input HIGH Programming
Voltage
Input LOW Programming
Voltage
3.0
0.4
GND < V
OUT
< V
CC
,
Output Disabled
V
CC
= Max., V
OUT
= GND
V
CC
= Max.,
I
OUT
= 0 mA
V
CC
= Max.,
CS
1
= V
IH
Com’l
Com’l
12
−10
−20
+10
−90
120
40
13
50
3.0
0.4
12
Test Conditions
V
CC
= Min., I
OH
=
−4.0
mA
V
CC
= Min., I
OL
= 16.0 mA
Guaranteed Input Logical
HIGH Voltage for All Inputs
Guaranteed Input Logical
LOW Voltage for All Inputs
GND < V
IN
< V
CC
−10
2.0
Min.
2.4
0.4
V
CC
0.8
+10
−10
Note 3
−10
−20
+10
−90
90
30
13
50
µA
mA
mA
mA
V
mA
V
V
2.0
Max.
7C291A-25
Min.
2.4
0.4
V
CC
0.8
+10
Max.
Unit
V
V
V
V
µA
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.
Document #: 38-04011 Rev. *A
Page 3 of 12
CY7C291A
Electrical Characteristics
Over the Operating Range
[2,3]
(continued)
7C291AL-35
Parameter
V
OH
V
OL
V
IH
V
IL
I
IX
V
CD
I
OZ
I
OS
I
CC
Description
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input Load Current
Input Diode Clamp Voltage
Output Leakage Current
Output Short Circuit Current
[4]
V
CC
Operating Supply Current
GND < V
OUT
< V
CC
,
Output Disabled
V
CC
= Max., V
OUT
= GND
V
CC
= Max.,
V
IN
= 2.0V
I
OUT
= 0 mA
V
CC
= Max.,
CS
1
= V
IH
Commercial
Military
Commercial
Military
12
13
50
3.0
0.4
3.0
0.4
12
30
−10
−20
Test Conditions
V
CC
= Min., I
OH
=
−4.0
mA
V
CC
= Min., I
OL
= 16.0 mA
Guaranteed Input Logical
HIGH Voltage for All Inputs
Guaranteed Input Logical
LOW Voltage for All Inputs
GND < V
IN
< V
CC
−10
2.0
0.8
+10
Note 3
+10
−90
60
−10
−20
+10
−90
90
90
30
40
13
50
V
mA
V
V
mA
µA
mA
mA
−10
Min.
2.4
0.4
2.0
0.8
+10
Max.
7C291A-35
7C291A-50
Min.
2.4
0.4
Max.
Unit
V
V
V
V
µA
I
SB
Standby Supply Current
(7C293A Only)
Programming Supply Voltage
Programming Supply Current
Input HIGH Programming Voltage
Input LOW Programming Voltage
V
PP
I
PP
V
IHP
V
ILP
Capacitance
[3]
Parameter
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
Test Conditions
T
A
= 25°C, f = 1 MHz,
V
CC
= 5.0V
Max.
10
10
Unit
pF
pF
Document #: 38-04011 Rev. *A
Page 4 of 12
CY7C291A
AC Test Loads and Waveforms
[3]
5V
OUTPUT
30pF
INCLUDING
JIG AND
SCOPE
R2
167Ω
R1250
Ω
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
R2
167Ω
R1250
Ω
3.0V
GND
< 5 ns
ALL INPUT PULSES
90%
10%
90%
10%
< 5 ns
(a) Normal Load
Equivalent to:
THÉ
VENIN EQUIVALENT
100Ω
OUTPUT
(b) High Z Load
2.0V
t
PU
50%
50%
V
CC
SUPPLY
CURRENT
A
0
−
A
10
ADDRESS
CS
2
−
CS
3
CS
1
t
AA
O
0
– O
7
t
PD
t
HZCS
t
ACS
Switching Characteristics
Over the Operating Range
[2, 3]
7C291A-20
Parameter
t
AA
t
HZCS1
t
ACS1
t
HZCS2
t
ACS2
t
PU
t
PD
Description
Address to Output Valid
Chip Select Inactive to High Z
Chip Select Active to Output Valid
Chip Select Inactive to High Z
Chip Select Active to Output Valid
Chip Select Active to Power-Up
Chip Select Inactive to Power-Down
0
22
Min.
Max.
20
15
15
22
22
0
27
7C291A-25
Min.
Max.
25
15
15
27
27
0
35
7C291A-35
7C291AL-35
Min.
Max.
35
20
20
35
35
0
45
7C291A-50
Min.
Max.
50
20
20
45
45
Unit
ns
ns
ns
ns
ns
ns
ns
Document #: 38-04011 Rev. *A
Page 5 of 12
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