器件名称: W24257A-35
功能描述: 32K X 8 High Speed CMOS Static RAM
文件大小: 188.97KB 共8页
简 介:W24257AJ-8N 32K × 8 HIGH SPEED CMOS STATIC RAM
GENERAL DESCRIPTION
The W24257AJ-8N 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: 8 nS (max.) Single +5V power supply Fully static operation
All inputs and outputs directly TTL compatible Three-state outputs Available packages: 28-pin 300 mil SOJ
PIN CONFIGURATIONS
BLOCK DIAGRAM
VDD VSS A0 . . DECODER CORE ARRAY
A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O1 I/O2 I/O3 VSS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 28-pin SOJ
28 27 26 25 24 23 22 21 20 19 18 17 16 15
VDD WE A13 A8 A9 A11 OE A10 CS I/O8 I/O7 I/O6 I/O5 I/O4
A14
CS OE WE CONTROL DATA I/O I/O1 . . I/O8
PIN DESCRIPTION
SYMBOL A0A14 I/O1I/O8 CS WE OE VDD VSS DESCRIPTION Address Inputs Data Inputs/Outputs Chip Select Input Write Enable Input Output Enable Input Power Supply Ground
-1-
Publication Release Date: February 1998 Revision A2
W24257AJ-8N
DC CHARACTERISTICS
Absolute Maximum Ratings
PARAMETER Supply Voltage to VSS Potential Input/Output to VSS Potential Allowable Power Dissipation Storage Temperature Operating Temperature RATING -0.5 to +7.0 -0.5 to VDD +0.5 1.0 -65 to +150 0 to +55 UNIT V V W °C °C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
TRUTH TABLE
CS H L L L OE X H L X WE X H ……
