DESCRIPTION
The Simtek STK10C68 is a fast static RAM 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 (the STORE operation), or from the EEPROM to the SRAM (the RECALL operation), using the NE pin. Transfers from the EEPROM to the SRAM (the RECALL operation) also take place automatically on restoration of power. The STK10C68 combines the high performance and ease of use of a fast SRAM with nonvolatile data integrity.
The STK10C68 features industry-standard pinout for nonvolatile RAMs. MIL-STD-883 and Standard Military Drawing (SMD #5962-93056) devices are also available.

FEATURES
• 20ns, 25ns, 35ns and 45ns Access Times
• STORE to EEPROM Initiated by Hardware
• RECALL to SRAM Initiated by Hardware or
   Power Restore
• Automatic STORE Timing
• 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