BUY D42102C-3 https://www.utsource.net/itm/p/11650935.html

Description: The D42102C-3 is a 24-pin DIP (Dual In-line Package) CMOS static RAM manufactured by NEC. Features: Low power consumption High speed operation High noise immunity Low voltage operation Low standby current Applications: Automotive systems Industrial control systems Computer systems Telecommunications systems Instrumentation systems Office automation systems (For reference only)