92A
CY7C291A
CY7C292A/CY7C293A
2K x 8 Reprogrammable PROM
identical, but are packaged in 300-mil (7C291A, 7C293A) and
Features
600-mil wide plastic and hermetic DIP packages (7C292A).
The CY7C293A has an automatic power down feature which
Windowed for reprogrammability
reduces the power consumption by over 70% when deselect-
CMOS for optimum speed/power
ed. The 300-mil ceramic package may be equipped with an
erasure window; when exposed to UV light the PROM is
High speed
erased and can then be reprogrammed. The memory cells uti-
20 ns (commercial)
lize proven EPROM floating-gate technology and byte-wide in-
25 ns (military) telligent programming algorithms.
The CY7C291A, CY7C292A, and CY7C293A are plug-in re-
Low power
placements for bipolar devices and offer the advantages of
660 mW (commercial and military)
lower power, reprogrammability, superior performance and
programming yield. The EPROM cell requires only 12.5V for
Low standby power
the supervoltage and low current requirements allow for gang
220 mW (commercial and military)
programming. The EPROM cells allow for each memory loca-
tion to be tested 100%, as each location is written into, erased,
EPROM technology 100% programmable
and repeatedly exercised prior to encapsulation. Each PROM
Slim 300-mil or standard 600-mil packaging available
is also tested for AC performance to guarantee that after cus-
5V 10% V , commercial and military tomer programming the product will meet DC and AC specifi-
CC
cation limits.
TTL-compatible I/O
A read is accomplished by placing an active LOW signal on
Direct replacement for bipolar PROMs
CS , and active HIGH signals on CS and CS . The contents
1 2 3
of the memory location addressed by the address line (A
Capable of withstanding >2001V static discharge
0
A ) will become available on the output lines (O O ).
10 0 7
Functional Description
The CY7C291A, CY7C292A, and CY7C293A are high-perfor-
mance 2K-word by 8-bit CMOS PROMs. They are functionally
Logic Block Diagram Pin Configurations
A
DIP
0
O
7
LCC/PLCC (Opaque Only)
Top View
A
1
Top View
PROGRAM-
A MULTI-
2
ROW O
6
MABLE
A V
7 1 24 CC
ADDRESS PLEXER
A
3 ARRAY
A
A 8
2 23
6
A
A 3 22 9
A
4 O 5 7C291A
5
4 32 1 2827 26
A
7C292A
4 10
A 21 A
4 25 10
A A 5
5 4
7C293A
CS
CS
A 5 20 1 24
3 A 1
3 6 7C291A
ADDRESS
O
4 CS CS
A 23 2
A 6 2 2 7
6 A 19
DECODER 2
CS
A
22 3
1 8
CS
A 3
1 7 18
A A 21
7 9 NC
0
A O
0 8 17 7C293A
O 7 NC 20 O
3 7
10
O
A O O 19 O
8 9 16 6 0 11 6
0
1314151617 18
12
10 O
O 15 5
1
COLUMN
A
9
O
ADDRESS 2
11 14 O
O 4
2
12 13
GND O
A 3
10
POWER
O C291A-3
1
DOWN
C291A-2
7C293A
O Window available on
0
7C291A and 7C293A
CS
1
only.
CS
2
CS
3
C291A-1
3901 North First Street San Jose CA 95134 408-943-2600
Cypress Semiconductor Corporation
March 1986 Revised May 1993
O
1
A
5
O
2 A
6
GND A
7
NC
NC
V
O CC
3
A
O 8
4
A
9
O
5CY7C291A
CY7C292A/CY7C293A
Selection Guide
7C291A-25 7C291A-35 7C291A-50
7C292A-25 7C292A-35 7C292A-50
7C293A-25 7C293A-35 7C293A-50
7C291A-20 7C291AL-25 7C291AL-35 7C291AL-50
7C292A-20 7C292AL-25 7C292AL-35 7C292AL-50
7C293A-20 7C293AL-25 7C293AL-35 7C293AL-50
Maximum Access Time (ns) 20 25 35 50
Maximum Operating Standard Commercial 120 90 90 90
Current (mA)
Military 120 90 90
L Commercial 60 60 60
Standby Current (mA) Commercial 40 30 30 30
7C293A Only
Military 40 40 40
Latch-Up Current..................................................... >200 mA
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
Operating Range
lines, not tested.)
Ambient
Storage Temperature ......................................65C to+150C
Range Temperature V
CC
Ambient Temperature with
Commercial 0C to + 70C 5V 10%
Power Applied ...................................................55C to+125C
[1]
Supply Voltage to Ground Potential...................0.5V to+7.0V Industrial 40C to + 85C 5V 10%
[2]
DC Voltage Applied to Outputs
Military 55C to + 125C 5V 10%
in High Z State......................................................0.5V to+7.0V
Notes:
DC Input Voltage .................................................3.0V to +7.0V
1. Contact a Cypress representative for industrial temperature range spec-
ifications.
DC Program Voltage .....................................................13.0V
2. T is the instant on case temperature.
A
2
UV Exposure.................................................7258 Wsec/cm
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
2
