BUY CAT24C44PI https://www.utsource.net/itm/p/405516.html
NVRAM EEPROM Based
Description: The CAT24C44PI is a 4Kb Serial CMOS EEPROM manufactured by ON Semiconductor. It is an 8-pin DIP package with an I2C interface. Features: Low power CMOS technology 4Kb of memory I2C interface 8-pin DIP package Low voltage operation High-speed clock frequency Low-power standby mode Self-timed write cycle Low-power write protection Low-power write enable Applications: Automotive Industrial Consumer Medical Telecommunications Networking Computing (For reference only)