compatible with Infineo SLE6636 The chip uses 1.2um CMOS & EEPROMprocess. It has 256 bits EEPROM(A type) or 512 bits EEPROM(B type) with logicalencryption function, its contact configuration is in accordance to ISO standard 7816-3(Synchronous Transmission). It can be used widely in intelligent public telephone area.Feature _ 256X 1bit E2PROM(A Type) 512 X 1bit E2PROM(B Type)