BUY W24257AK-15 https://www.utsource.net/itm/p/150117.html
32K X 8 High Speed CMOS Static RAM
Description: The W24257AK-15 is a 256K x 8-bit CMOS static RAM organized as 32K x 8-bit. It is fabricated using Winbond's high-performance CMOS technology. Features: Low power consumption Fast access time: 70/90/120/150ns Single +5V ±10% power supply Fully static operation TTL compatible inputs and outputs CMOS compatible inputs No clock or refresh required Data retention voltage: 2.0V min Easy memory expansion Pin and function compatible with W24256AK-15 Applications: Automotive Industrial control Instrumentation Medical Military Telecommunications Test and measurement (For reference only)