BUY UM62256D-70LL https://www.utsource.net/itm/p/1114079.html
128K x 8 CMOS SRAM
Description: 256K x 8-Bit High Speed CMOS Static RAM Features: Low Power Consumption Single +5V ±10% Power Supply Fast Access Time: 70ns TTL Compatible Inputs and Outputs CMOS Compatible Inputs High Reliability Fully Static Operation No Clock or Refresh Required Automatic Power Down when deselected Low Standby Current Easy Memory Expansion Pin and Function Compatible with 6264 Application: Automotive Electronics Industrial Control Instrumentation Data Acquisition Robotics Communications Office Automation Medical Electronics (For reference only)