器件名称: W24257S-70L
功能描述: 32K X 8 CMOS STATIC RAM
文件大小: 106.56KB 共10页
简 介:W24257 32K × 8 CMOS STATIC RAM
GENERAL DESCRIPTION
The W24257 is a slow 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
Low power consumption: Active: 325 mW (max.) Standby: 75 W (max.) (LL-version) 150 W (max.) (L-version) Access time: 70 nS (max.) Single +5V power supply Fully static operation
All inputs and outputs directly TTL compatible Three-state outputs Battery back-up operation capability Data retention voltage: 2V (min.) Packaged in 28-pin 330 mil SOP, standard type one TSOP (8 mm x 13.4 mm )
PIN CONFIGURATIONS
BLOCK DIAGRAM
V DD
A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O1 I/O2 I/O3 V SS
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24
V DD #WE A13 A8 A9 A11 #OE A10 #CS I/O8 I/O7 I/O6 I/O5 I/O4
V SS A0 . . A14
DECODER CORE ARRAY
28-pin SOP
23 22 21 20 19 18 17 16 15
#CS #OE #WE
CONTROL DATA I/O
I/O1 . . I/O8
#OE A11 A9 A8 A13 #WE V DD 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 27 26 25 24 23 22 21 20 19 18 17 16 15
A10 #CS I/O 8 I/O 7 I/O 6 I/O 5 I/O 4 V SS I/O 3 I/O 2 I/O 1 A0 A1 A2
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 2001 Revision A16
W24257
TRUTH TABLE
#CS H L L L #OE X H L X #WE X ……
