CY7C291A
2K x 8 Reprogrammable PROM
Features
Functional Description
• Windowed for reprogrammability
• CMOS for optimum speed/power
• High speed
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.
— 20 ns (Commercial)
— 35 ns (Military)
• Low power
— 660 mW (Commercial and Military)
• Low standby power
A read is accomplished by placing an active LOW signal on
CS1, and active HIGH signals on CS2 and CS3. The contents
of the memory location addressed by the address line
(A0−A10) will become available on the output lines (O0−O7).
Pin Configurations
A0
DIP
Top View
O7
A1
A2
A3
ROW
ADDRESS
PROGRAMMABLE
ARRAY
MULTIPLEXER
O6
A7
A6
A4
A5
A4
A3
O5
A5
A6
ADDRESS
DECODER
O4
A2
A1
A0
A7
O3
A8
A9
A10
O0
COLUMN
ADDRESS
O1
O2
GND
O2
POWER
DOWN
7C293A
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
LCC/PLCC (Opaque Only)
Top View
VCC
A8
A9
A10
CS1
CS2
CS3
O7
O6
O5
O4
O3
A5
A6
A7
NC
V
CC
A8
A9
Logic Block Diagram
A4
A3
A2
A1
A0
NC
O0
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
A10
CS1
CS2
CS3
NC
O7
O6
O1
O2
GND
NC
O3
O4
O5
•
•
•
•
•
•
— 220 mW (Commercial and Military)
EPROM technology 100% programmable
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
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 performance to guarantee that after customer programming the
product will meet DC and AC specification limits.
O1
Window available
O0
CS1
CS2
CS3
Cypress Semiconductor Corporation
Document #: 38-04011 Rev. *B
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised August 17, 2006
