BUY CY7C164-25PC https://www.utsource.net/itm/p/201120.html
16K x 4 Static RAM
Description: The CY7C164-25PC is a 25-bit static shift register manufactured by Cypress Semiconductor. It is a low-power CMOS device with a wide operating voltage range of 2.0V to 6.0V. Features: - Low power consumption - Wide operating voltage range (2.0V to 6.0V) - 25-bit static shift register - High speed operation - Low noise - High noise immunity Applications: - Data transmission - Serial data storage - Data buffering - Data synchronization - Data processing - Digital signal processing (For reference only)