P93U422-35DC Ver la hoja de datos (PDF) - Performance Semiconductor
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P93U422-35DC Datasheet PDF : 6 Pages
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P93U422
HIGH SPEED 256 x 4
STATIC CMOS RAM
P93U422
FEATURES
Universal 256 x 4 Static RAM
One part, the 93U422, replaces the following
bipolar and CMOS parts:
– 93422A
– 93422
– 93L422A
– 93L422
Fast Access Time
– 35 ns (Commercial)
– 35 ns (Military)
Standard 400 mil DIP and Chip carrier packages
CMOS for Low Power
– 440 mW (Commercial)
– 495 mW (Military)
5V Power Supply ±10% for both commercial
and military temperature ranges
Separate I/O
Fully static operation with equal access and
cycle times
Resistant to single event upset and latchup due
to advanced process and design improvements
DESCRIPTION
The P93U422 is a 1,024-bit high-speed Static RAM with
a 256 x 4 organization. The P93U422 is a universal
device designed to replace the entire 93 and 93L 256 x 4
static RAM families. 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 (CS ) and active HIGH
1
chip select two (CS2) as well as 3-state outputs.
In addition to high performance, the device features
latch-up protection, single event and upset protection.
The P93U422 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
22
21
VCC INDEX
A4
A1 A2 A3 VCC A4 WE
20 WE
1 9 CS1
3 2 1 24 23 22
A0 4
21 CS1
18 OE
A5 5
20 OE
1 7 CS2
NC 6
19 CS2
16 O3
1 5 D3
14 O2
1 3 D2
12 O1
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)
TOP VIEW
DIP (P3-1, D3-1)
TOP VIEW
LCC (L4)
TOP VIEW
Means Quality, Service and Speed
1Q97
7
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