BUY U634H256CSC25 https://www.utsource.net/itm/p/8945280.html

Description: 256K x 8 CMOS SRAM Feature: High-speed access time: 55ns Low power consumption Single power supply Low standby current Fully static operation No clock or refresh required TTL compatible inputs and outputs Output enable and chip enable CMOS power levels JEDEC standard pinouts Available in SOP32 package Application: Automotive Industrial Medical Networking Telecommunications Consumer Electronics (For reference only)