BUY UM6116-2 https://www.utsource.net/itm/p/11539921.html

Description: The UM6116-2 is a 2K x 8 bit CMOS Static RAM. Features: Low power consumption Fast access time Low standby current TTL compatible inputs and outputs Single 5V power supply Fully static operation No clock or refresh required Automatic power down when deselected Applications: Microprocessor systems Automotive systems Industrial control systems Data acquisition systems Instrumentation systems Embedded systems (For reference only)