DEMULTIPLEXER DEFINITION
A demultiplexer (or demux) is a device that takes a single line of input and routes it to one of several digital output lines. A demux of 2 n outputs has n select lines, which are used to select which output line to send input to. A demux is also called a data distributor. Demuxes can be used to implement general purpose logic. By setting the input to true, the demux acts like a decoder.
DEMULTIPLEXER OPERATION
The operation is similar to the MUX, both as regards the selection and as regards the activation of the AND gate concerned. The operation of the demux consists in routing the value of an input to the output specified by the command variables, while all the other outputs remain at 0. The input is routed to the output Xi if and only if the value of the command variables represents the binary coding of the integer i. A demux is a logic circuit whose main function is inverse to that of the Multiplexer. Formally, the demultiplexer is a logical network with 1 data input, n control signals and 2n outputs. The output marked with an index equal to the configuration of the control signals receives the input while the others are not enabled. So the demux performs the function of sorting a single input into one of the n possible outputs
CIRCUIT SCHEME
BLOCK DIAGRAM
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