Nonvolatile SRAM, NVSRAM, Serial F-RAM Memory, Random Access Memory

 FM25V05 Series 512 Kb (64 K x 8) 3V Surface Mount Serial F-RAM Memory - SOIC-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--nvram--fram-mram/fm25v05-g-infineon-9281437