BUY DS1210+ https://www.utsource.net/itm/p/4385945.html
IC CONTROLLER CHIP NV 8-DIP
Description: The DS1210+ is a nonvolatile static RAM (NVSRAM) that combines the features of a low-power CMOS static RAM with a lithium energy source and control logic. Features: Low-power CMOS static RAM Nonvolatile memory Low-power operation 8K x 8 bit organization Low-voltage operation Low-power standby mode Data retention for 10 years DIP8 package Applications: Automotive systems Industrial control systems Medical instrumentation Networking systems Telecommunications systems Security systems Data logging systems (For reference only)