Serial I2C Bus EEPROM, non volatile memory, eeprom volatile or non-volatile eeprom

 M24C04 Series 4 Kb (512 x 8) 2.5 V SMT Serial I²C Bus EEPROM - SOIC-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--nvram--quantum-trap-nvsram/m24c04-wmn6p-stmicroelectronics-2545085