器件名称: STK20C04-W30I
功能描述: CMOS nvSRAM High Performance 512 x 8 Nonvolatile Static RAM
文件大小: 79.26KB 共8页
简 介:STK20C04
STK20C04
CMOS nvSRAM High Performance 512 x 8 Nonvolatile Static RAM
FEATURES
30, 35 and 45ns Access Times 15, 20 and 25ns Output Enable Access Unlimited Read and Write to SRAM Hardware STORE Initiation Automatic STORE Timing 105 STORE cycles to EEPROM 10 year data retention in EEPROM Automatic RECALL on Power Up Hardware RECALL Initiation Unlimited RECALL cycles from EEPROM Single 5V±10% Operation Commercial and Industrial Temperatures Available in 600 mil PDIP package
DESCRIPTION
The Simtek STK20C04 is a fast static RAM (30, 35, 45ns), with a nonvolatile electrically-erasable PROM (EEPROM) element incorporated in each static memory cell. The SRAM can be read and written an unlimited number of times, while independent nonvolatile data resides in EEPROM. Data may easily be transferred from the SRAM to the EEPROM (STORE), or from the EEPROM to the SRAM (RECALL) using the NE pin. It combines the high performance and ease of use of a fast SRAM with nonvolatile data integrity. The STK20C04 features the industry standard pinout for nonvolatile RAMs in a 28-pin 600 mil plastic DIP.
LOGIC BLOCK DIAGRAM
EEPROM ARRAY 64 X 64 STORE
ROW DECODER
PIN CONFIGURATIONS
NE NC A7 A
6 5 4 3 2 1 0 0 1 2 14 15 6 7 8 9 10 11 12 13 23 22 21 20 19 18 17 16 1 2 3 4 5 28 27 26 25 24
V CC W NC A
8
A3 A4 A5 A6 A7 A8 STATIC RAM ARRAY 64 X 64
RECALL
A A A A A A DQ DQ DO
NC NC G NC E DQ 7 DQ 6 DQ 5 DQ 4 DQ 3
VSS
28 - 600 PDIP
DQ 0 DQ 1 DQ 2 DQ 3 DQ 4 DQ 5 DQ 6 DQ 7 E W INPUT……
