ST24C04, ST25C04 ST24W04, ST25W04 4 Kbit Serial I2.
ST Microelectronics
ST24C04 - (ST2xxx) 4 Kbit Serial I2C Bus EEPROM with User-Defined Block Write Protection
ST24C04, ST25C04 ST24W04, ST25W04 4 Kbit Serial I2C Bus EEPROM with User-Defined Block Write Protection 1 MILLION ERASE/WRITE CYCLES with 40 YEARS DAT.