name: x25020 function: 256*8 SPI Serial EEPROM with Block Lock Protection package: DIP,SOIC,8 manufacturer: Xicor +--()--+ *cs | 1 8| Vcc so | 2 7| *hold *wp | 3 6| sck Vss | 4 5| si +------+ This pinout came from the Chipdir: http://www.chipdir.org/