ST24LC21B, ST24LW21 ST24FC21, ST24FC21B, ST24FW21 .
ST24LC21B - 1 Kbit x8 Dual Mode Serial EEPROM
ST24LC21B, ST24LW21 ST24FC21, ST24FC21B, ST24FW21 1 Kbit (x8) Dual Mode Serial EEPROM for VESA PLUG & PLAY 1 MILLION ERASE/WRITE CYCLES 40 YEARS DATA .