Simtek STK11C68
STK11C68 is a fast static RAM with a nonvolatile, electrically erasable PROM 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 the EEPROM. The STK11C68 is pin-compatible with industrystandard SRAMs.FEATURES
● 20ns, 25ns, 35ns and 45ns Access Times● STORE to EEPROM Initiated by Software
● RECALL to SRAM Initiated by Software or Power Restore
● 10mA Typical ICC at 200ns Cycle Time
● Unlimited READ, WRITE and RECALL Cycles
● 1,000,000 STORE Cycles to EEPROM
● 100-Year Data Retention over Full Industrial Temperature Range
● Commercial and Industrial Temperatures
● 28-Pin DIP and SOIC Packages
DESCRIPTION
The Simtek Data transfers from the SRAM to the EEPROM (the STORE operation), or from EEPROM to SRAM (the RECALL operation), take place using a software sequence. Transfers from the EEPROM to the SRAM (the RECALL operation) also take place automatically on restoration of power. MIL-STD-883 device is also available (STK11C68-M). BLOCK DIAGRAM EEPROM ARRAY 128 x 512 PIN CONFIGURATIONS NC A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS 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 A5 ROW DECODER A6 A7 A8 A9 A11 A12 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 STORE STATIC RA...