X24C44P (Renesas) is a 256-bit serial nonvolatile static RAM (16 x 16) with a static RAM overlaid bit-by-bit with a nonvolatile EEPROM array (X24C44, from Xicor), in an 8-pin PDIP package.
16 x 16 organization · single 5V supply · TTL and CMOS compatible
STORE operation (RAM to EEPROM) completed in 5ms or less and RECALL operation (EEPROM to RAM) in 2µs or less · auto RECALL on power-up
Minimum I/O serial interface compatible with COPS and 8051 · software and hardware control of nonvolatile functions
1,000,000 STORE cycles · 100 years data retention · 10mA maximum active current and 50µA maximum standby current
