Nonvolatile SRAM, sram memory card, parallel nvsram, Non-volatile memory

 M93C46 Series 1 Kb (128 x 8 / 64 x 16) 2.5 V Microwire® Serial EEPROM - SOIC-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--nvram--quantum-trap-nvsram/m93c46-wmn6p-stmicroelectronics-2606390