BUY TC5517CPL-20 https://www.utsource.net/itm/p/955046.html
IC IC,SRAM,2KX8,CMOS,DIP,24PIN,PLASTIC, Static RAM
Description: The TC5517CPL-20 is a 256K x 8 bit CMOS Static RAM. Features: - Low power consumption - Fast access time: 20ns - High speed data transfer - Low standby current - High noise immunity - TTL compatible - Single 5V power supply - Pin and function compatible with TC5517APL-20 Applications: The TC5517CPL-20 is suitable for use in applications such as data storage, cache memory, and program memory. It is also suitable for use in embedded systems, industrial automation, and medical equipment. (For reference only)