Nonvolatile SRAM, nvSRAM, nvram storage, sram non-volatile, sram memory

 M34E02 Series 2 Kb (256 K x 8) 1.7 V SMT Serial I²C Bus EEPROM - UFDFPN-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--nvram--quantum-trap-nvsram/m34e02-fmc6tg-stmicroelectronics-5041836