NON volatile static ram, sram chip, static random access memory, sram memory

 CY62146EV30 Series 4 Mb (256 K x 16) 2.2 - 3.6 V 45 ns Static RAM - VFBGA-48

https://www.futureelectronics.com/p/semiconductors--memory--RAM--static-ram--asynchronous/cy62146ev30ll-45bvxit-cypress-1096268