器件名称: W24258Q-55LL
功能描述: 32K X 8 CMOS STATIC RAM
文件大小: 185.65KB 共10页
简 介:W24258/LL 32K × 8 CMOS STATIC RAM
GENERAL DESCRIPTION
The W24258/LL is a normal speed, very 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: 350 mW (max.) Standby: 25 W (max.) Access time: 55/70 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 600 mil DIP, 330 mil SOP and standard type one TSOP (8 mm × 13.4 mm)
PIN CONFIGURATIONS
BLOCK DIAGRAM
CLK GEN. A12 A14 A2 R O W D E C O D E R PRECHARGE CKT.
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-pin DIP
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
A3 A4 A5 A6 A7 A13 I/O1 I/O8
CORE CELL ARRAY 512 ROWS 64 X 8 COLUMNS
DATA CNTRL. CLK GEN.
I/O CKT. COLUMN DECODER
WE CS OE
A11 A10 A1 A0 A8 A9
PIN DESCRIPTION
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 27 26 25 24 23 22 21 20 19 18 17 16 15 A10 CS I/O8 I/O7 I/O6 I/O5 I/O4 V SS I/O3 I/O2 I/O1 A0 A1 A2
28-pin TSOP
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
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