Types of Non Volatile SRAMs, NV RAM memories, SRAM, EEPROMs,

 M24C01 Series 1 kb (128 x 8) 2.5 V SMT Serial I²C Bus EEPROM -SOIC-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--nvram--quantum-trap-nvsram/m24c01-wmn6p-stmicroelectronics-8895914