En demultiplexer (kortform demux) är inom elektroniken en anordning som bland flera insignaler väljer en (och endast en) utsignal beroende på kontrollsignal. Like a multiplexer, it can be equated to a controlled switch. In electronics, a multiplexer (or mux) is a device that selects one of several analog or digital . A demultiplexer, sometimes abbreviated dmux, is a circuit that has one input and more than one output.

It is used when a circuit wishes to send a signal to one of . Electronics Tutorial about the Demultiplexer (DEMUX) used for Data Distribution in Combinational Logic Circuits including Digital Decoders. The action or operation of a demultiplexer is opposite to that of the multiplexer. As inverse to the MUX , demux is a one-to-many circuit.

A multiplexer is a circuit that accept many input but give only one output. A demultiplexer function exactly in the reverse of a multiplexer, that is a . It decodes four binary weighted address inputs (Ato A3) to sixteen mutually . A demultiplexer (or demux) is a device that takes a single input line and routes it to one of several digital output lines. A demultiplexer of 2n outputs has n select .