ST93C56B1 Serial Microwiure EEEPROM by STMicroelectronics. Organistion: Dual : 128 x 16 or 256 x 8-Bit Package: 8-DIP Operating Voltage: 93C56B1 Download STMicroelectronics ST93C56B1 datasheet: Status: NOS (New Old Stock) RoHS compliant: no