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W24257

器件名称: W24257

功能描述: 32K X 8 CMOS STATIC RAM

文件大小: 106.56KB 共10页

生产厂商: WINBOND

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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 ……

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