Types of Non Volatile SRAMs, Non volatile ram memory, non volatile RAM memories

 CY62157EV30 Series 8 Mb (512 K x 16) 2.2 - 3.6 V 45 ns Static RAM - TSOP-48

https://www.futureelectronics.com/p/semiconductors--memory--RAM--static-ram--asynchronous/cy62157ev30ll-45zxi-cypress-2632099