X24C44

APPLICATION NOTES A V A I L A B L E AN3 AN7 AN8 AN15 AN16 AN25 AN29 AN30 AN35 AN36 AN39 AN56 AN69 X24C44 256 Bit X24C44 Serial Nonvolatile Static RAM 16 x 16 Bit FEATURES DESCRIPTION The Xicor X24C44 is a serial 256 bit NOVRAM featuring a static RAM configured 16 x 16, overlaid bit-by-bit with a nonvolatile E2PROM array. The X24C44 is fabricated with Xicor’s Advanced CMOS Floating Gate technology. The Xicor NOVRAM design allows data to be transferred between the two memory arrays by means of software commands or external hardware inputs. A store operation (RAM data to E2PROM) is completed in 5ms or less and a recall operation (E2PROM data to RAM) is completed in 2µs or less. 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. Inherent data retention is specified to be greater than 100 years. Advanced CMOS Version of Xicor’s X2444 16 x 16 Organization Single 5 Volt Supply Ideal for use with Single Chip Microcomputers —Static Timing —Minimum I/O Interface —Serial Port Compatible (COPS™, 8051) —Easily Interfaced to Microcontroller Ports Software and Hardware Control of Nonvolatile Functions Auto Recall on Power-Up TTL and CMOS Compatible Low Power Dissipation —Active Current: 10mA Maximum —Standby Current: 50µA Maximum 8-Lead PDIP, Cerdip, and 8-Lead SOIC Packages High Reliability —Store Cycles: 1,000,000 —Data Retention: 100 Yea...