BUY X24C04S https://www.utsource.net/itm/p/76373.html
Serial E2PROM
Manufacturer: Xicor Description: 4K Serial CMOS EEPROM Features: Low Voltage Operation: 1.8V to 5.5V Single Supply Operation 1MHz Clock Rate Low Power CMOS Technology 2-Wire Serial Interface Schmitt Trigger, Filtered Inputs for Noise Suppression Write Protect Pin for Hardware Data Protection Self Timed Write Cycle (5ms max) High Reliability Endurance: 100,000 Cycles Data Retention: 100 Years 8-pin SOIC, 8-pin TSSOP Packages Applications: Automotive Industrial Consumer Computer Communications Networking Medical (For reference only)