74HC240 Octal Buffer/Line Driver IC (DIP-20 Package)

A microcontroller pin driving a long wire run, several parallel inputs, or an LED display directly can struggle to supply enough current to keep the signal clean, and the 74HC240 exists to take that load off the original source. Its eight independent inverting buffer channels each boost a weak digital signal's drive strength, letting a single chip restore eight lines of a wide data bus or driver interface at once rather than needing separate buffer stages for each line.