A demultiplexer, often abbreviated as Demux, is a digital switch that takes a single input signal and routes it to one of several output lines. It operates based on control signals that determine which output line will receive the input. This device is commonly used in communication systems to direct data from one source to multiple destinations. In electronic circuits, Demux is essential for managing data flow and ensuring that signals reach the correct components. It can be found in various applications, including telecommunications, data routing, and signal processing, where efficient data distribution is crucial.