BUY MB74LS240 https://www.utsource.net/itm/p/4649862.html

(DIP-20，FUJI） Description: The MB74LS240 is a 20-pin DIP (dual in-line package) TTL (transistor-transistor logic) device manufactured by FUJI. It is a 4-bit buffer/line driver with open-collector outputs and is designed to be used with a bus-oriented system. Features: Low power consumption High noise immunity High speed operation Open collector outputs TTL compatible Applications: The MB74LS240 is used in a variety of applications including data transmission, data storage, and signal processing. It is also used in computer systems, communication systems, and other electronic equipment. (For reference only)