The CAT93C57PA-REV-E is a 2Kb CMOS Serial EEPROM device which
is organized as either 128 registers of 16 bits (ORG pin at VCC) or 256
registers of 8 bits (ORG pin at GND). Each register can be written (or
read) serially by using the DI (or DO) pin. The CAT93C56/57 features
sequential read and self−timed internal write with auto−clear. On−chip
Power−On Reset circuitry protects the internal logic against powering
up in the wrong state.
Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.