What function does a multiplexer serve?

A multiplexer, often abbreviated as MUX, functions by combining several input signals into one output signal. It effectively routes digital data from multiple sources and allows for the selection of one of these sources to be transmitted to the output at any given time. The control signals determine which input is connected to the output, enabling efficient management of multiple data streams without requiring additional lines.

In digital circuits, multiplexers are essential in applications such as data switching, where they can route data from different sources to a single destination, thus conserving resources and reducing the complexity of wiring. This capability makes the multiplexer a crucial component in various systems, such as communication networks and data processing units.