鈥?/div>
5V
卤10%
V
CC
, commercial and military
鈥?TTL-compatible I/O
鈥?Direct replacement for 27C64 EPROMs
powers down into a low-power standby mode. It is packaged
in a 600-mil-wide package. The reprogrammable packages
are equipped with an erasure window; when exposed to UV
light, these PROMs are erased and can then be repro-
grammed. The memory cells utilize proven EPROM
floating-gate
technology
and
byte-wide
intelligent
programming algorithms.
The CY7C266 is a plug-in replacement for EPROM devices.
The EPROM cell requires only 12.5V for the super voltage 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.
Reading is accomplished by placing an active LOW signal on
OE and CE. The contents of the memory location addressed
by the address lines (A
0
through A
12
) will become available on
the output lines (O
0
through O
7
).
Functional Description
The CY7C266 is a high-performance 8192-word by 8-bit
CMOS PROM. When deselected, the CY7C266 automatically
Logic Block Diagram
O
7
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
A
10
A
11
A
12
POWER DOWN
O
1
O
2
COLUMN
ADDRESS
O
3
ADDRESS
DECODER
O
4
O
5
ROW
ADDRESS
PROGRAMMABLE
ARRAY
O
6
MULTIPLEXER
Pin Configurations
CerDIP
Top View
V
CC
A
12
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
O
0
O
1
O
2
GND
1
2
3
4
5
6
7
8
9 7C266
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
V
CC
NC
A
8
A
9
A
11
OE
A
10
CE
O
7
O
6
O
5
O
4
O
3
LCC
Top View
A7
A 12
VCC
NC
VCC
VCC
NC
A
6
A
5
A
4
A
3
A
2
A
1
A
0
NC
O
0
4 3 2 1 32 31 30
29
5
28
6
27
7
26
8
25
9
24
10
23
11
7C266
22
12
21
13
14151617 181920
O1
O2
GND
NC
O3
O4
O5
A
8
A
9
A
11
NC
OE
A
10
CE
O
7
O
6
O
0
CE
OE
Cypress Semiconductor Corporation
Document #: 38-04005 Rev. *B
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134 鈥?408-943-2600
Revised December 27, 2002