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P4C422 Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – ULTRA HIGH SPEED 256 X 4 STATIC CMOS RAM
P4C422
P4C422
ULTRA HIGH SPEED 256 x 4
STATIC CMOS RAM
FEATURES
High Speed (Equal Access and Cycle Times)
– 10/12/15/20/25/35 ns (Commercial)
– 15/20/25 /35 ns (Military)
CMOS for Low Power
– 495 mW Max. – 10/12/15/20/25 (Commercial)
– 495 mW Max. – 15/20/25/35 (Military)
Single 5V±10% Power Supply
Separate I/O
Fully TTL Compatible Inputs and Outputs
Resistant to single event upset and latchup
resulting from advanced process and design
improvements
Standard 22-pin 400 mil DIP, 24-pin 300 mil
SOIC, 24-pin LCC package and 24-pin CERPACK
package
DESCRIPTION
The P4C422 is a 1,024-bit high-speed (10ns) Static RAM
with a 256 x 4 organization. The memory requires no
clocks or refreshing and has equal access and cycle
times. Inputs and outputs are fully TTL compatible.
Operation is from a single 5 Volt supply. Easy memory
expansion is provided by an active LOW chip select one
(CS1) and active HIGH chip select two (CS2) as well as 3-
state outputs.
In addition to very high performance and very high den-
sity, the device features latch-up protection, single event
and upset protection. The P4C422 is offered in several
packages: 22-pin 400 mil DIP (plastic and ceramic), 24-
pin 300 mil SOIC, 24-pin LCC and 24-pin CERPACK.
Devices are offered in both commercial and military
temperature ranges.
FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS
D0
D1
D2
D
3
A0
A
32 X 32
ARRAY
1
A2
A3
A4
A5
A6
A7
COLUMN
DECODER
CS2
CS1
WE
OE
O0
O1
O2
O3
A3 1
A2 2
A1 3
A0 4
A5 5
A6 6
A7 7
GND 8
D0 9
O0 10
D1 11
NC 12
24 VCC A3 1
23 A4
22 WE
A2 2
A1 3
21 CS1
20 OE
A0 4
A5 5
19 CS2 A6 6
18 O3
A7 7
17 D3 GND 8
16 O2
D0 9
15 D2
O0 10
14 O1
D1 11
13 NC
2 2 VCC
21 A4
20 WE
1 9 CS1
18 OE
1 7 CS2
16 O3
1 5 D3
14 O2
1 3 D2
12 O1
INDEX
A1 A2 A3 VCC A4 WE
3 2 1 24 23 22
A0 4
21 CS1
A5 5
20 OE
NC 6
19 CS2
A6 7
18 NC
A7 8
17 O3
GND 9
16 D3
10 11 12 13 14 15
D0 O0 D1 O1 D2 O2
SOIC (S4)
CERPACK (F3) SIMILAR
TOP VIEW
DIP (P3-1, D3-1)
TOP VIEW
LCC (L4)
TOP VIEW
Means Quality, Service and Speed
1Q97
1
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