X20C17

APPLICATION NOTE A V A I L A B L E X20C17 16K AN56 X20C17 High Speed AUTOSTORE™ NOVRAM 2K x 8 Bit FEATURES DESCRIPTION The Xicor X20C17 is a 2K x 8 NOVRAM featuring a highspeed static RAM overlaid bit-for-bit with a nonvolatile electrically erasable PROM (E 2 PROM) and the AUTOSTORE feature which automatically saves the RAM contents to E2PROM at power-down. The X20C17 is fabricated with advanced CMOS floating gate technology to achieve high speed with low power and wide power-supply margin. The X20C17 features a compatible JEDEC approved byte-wide memory pinout for industry standard SRAMs. The NOVRAM design allows data to be easily transferred from RAM to E2PROM (store) and E2PROM to RAM (recall). The store operation is completed in 2.5ms or less. An automatic array recall operation reloads the contents of the E2PROM into RAM upon power-up. Xicor NOVRAMS are designed for unlimited write operations to RAM, either from the host or recalls from E2PROM, and a minimum 1,000,000 store operations to the E2PROM. Data retention is specified to be greater than 100 years. 24-Pin Standard SRAM DIP Pinout Fast Access Time: 35ns, 45ns, 55ns High Reliability —Endurance: 1,000,000 Nonvolatile Store Operations —Retention: 100 Years Minimum AUTOSTORE™ NOVRAM —Automatically Stores SRAM Data Into the E2PROM Array When VCC Low Threshold is Detected —E2PROM Data Automatically Recalled Into RAM Upon Power-up Low Power CMOS —Standby: 250µA Infinite E2PROM Array Recall, and RAM ...