W24257A Datasheet, PDF (1/11 Pages) Winbond – 32K X 8 High Speed CMOS Static RAM

W24257A
32K × 8 HIGH SPEED CMOS STATIC RAM
GENERAL DESCRIPTION
The W24257A is a high speed, low power CMOS static RAM organized as 32768 × 8 bits that
operates on a single 5-volt power supply. This device is manufactured using Winbond's high
performance CMOS technology.
FEATURES
• High speed access time: 10/12/15/20 nS (max.)
• Low power consumption:
− Active: 400 mW (typ.)
• Single +5V power supply
• Fully static operation
• All inputs and outputs directly TTL compatible
• Three-state outputs
• Available packages: 28-pin 300 mil SOJ, 330
mil SOP, skinny DIP and standard type one
TSOP (8 mm × 13.4 mm)
PIN CONFIGURATIONS
BLOCK DIAGRAM
A14
1
A12
2
28
VDD
27
WE
A7
3
26
A13
A6
4
25
A8
A5
5
24
A9
A4
6
23
A11
A3
7
22
OE
28-pin
A2
8
DIP
21
A10
A1
9
20
CS
A0
10
19
I/O8
I/O1
11
18
I/O7
I/O2
12
17
I/O6
I/O3
13
16
I/O5
V SS
14
15
I/O4
OE
1
A11
2
A9
3
A8
4
A13
5
WE
6
VDD
7
A14
8
A12
9
A7
10
A6
11
A5
12
A4
13
A3
14
28-pin
TSOP
28
A10
27
CS
26
I/O8
25
I/O7
24
I/O6
23
I/O5
22
I/O4
21
VSS
20
I/O3
19
I/O2
18
I/O1
17
A0
16
A1
15
A2
VDD
VSS
A0
.
DECODER
.
A14
CORE
ARRAY
CS
OE ^CONTROL
WE
I/O1
DATA I/O
.
.
I/O8
PIN DESCRIPTION
SYMBOL
DESCRIPTION
A0−A14 Address Inputs
I/O1−I/O8 Data Inputs/Outputs
CS
Chip Select Input
WE
Write Enable Input
OE
Output Enable Input
VDD
Power Supply
VSS
Ground
Publication Release Date: May 1997
-1-
Revision A14