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 ...
Description
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
A11 A9 A8
A13
WE VDD A14 A12
A7 A6 A5 A4 A3
1 2 3 4 5 6 7 8 9 10 11 12 13 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
DATA I/O
I/O1 . .
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
W24257A
DC CHARACTERISTICS Absolute Maximum Ratings
PARAMETER
RATING
UNIT
Supply Voltage to VSS P...
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