[Simtek]

DESCRIPTION
The STK15C68 is a fast SRAM with a nonvolatile 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 transfers from the SRAM to EEPROM (the STORE operation) can take place automatically on power down using charge stored in system capacitance.

FEATURES
• Nonvolatile Storage Without Battery Problems
• Directly Replaces 8K x 8 static RAM, Battery Backed RAM or EEPROM
• 25ns, 35ns and 45ns Access Times
• Store to EEPROM Initiated by Software or AutoStore™ on Power Down
• Recall to SRAM by Software or Power Restore
• 15mA 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 Temp. Ranges
• 28 Pin 600 or 300 mil PDIP and 350 mil SOIC