DESCRIPTION
The X22C12 is a 256 x 4 CMOS NOVRAM featuring a high-speed static RAM overlaid bit-for-bit with a nonvolatile E2PROM. The NOVRAM design allows data to be easily transferred from RAM to E2PROM (STORE) and from E2PROM to RAM (RECALL). The STORE operation is completed within 5ms or less and the RECALL is completed within 1µs.

FEATURES
• High Performance CMOS
    —150ns RAM Access Time
• High Reliability
    —Store Cycles: 1,000,000
    —Data Retention: 100 Years
• Low Power Consumption
    —Active: 40mA Max.
    —Standby: 100µA Max.
• Infinite Array Recall, RAM Read and Write Cycles
• Nonvolatile Store Inhibit: VCC = 3.5V Typical
• Fully TTL and CMOS Compatible
• JEDEC Standard 18-Pin 300-mil DIP
• 100% Compatible with X2212
    —With Timing Enhancements