The 74LS157 is a Quad 2-to-1 Data Selector/Multiplexer IC from the 74LS TTL logic family. It allows selection between two sets of 4-bit data inputs and outputs the selected data based on a common select line, making it ideal for efficient data routing in digital systems.

This IC features four independent 2-to-1 multiplexers with a shared select control and an enable (strobe) input for added flexibility. Built with low-power Schottky technology, the 74LS157 offers high-speed switching and reliable performance in a wide range of applications.