BUY NM27C256Q-150 https://www.utsource.net/itm/p/11225301.html

Description: The NM27C256Q-150 is a CMOS 256K (32K x 8) high speed, low power EPROM. Features: - 256K (32K x 8) bit memory organization - 150 ns access time - Low power CMOS technology - Single 5V ±10% power supply - TTL compatible inputs and outputs - High speed CMOS page mode - High reliability - 100K erase/program cycles Applications: - Automotive - Industrial control - Instrumentation - Military - Telecommunications - Consumer electronics (For reference only)