![]() ![]() The boolean expression for every output isĮvery output of this decoder includes one product term. The main difference between a decoder and a demultiplexer is a combinational circuit that is used to allow only one input as well as direct it into one of the outputs, whereas a decoder allows several inputs and generates the decoded output. The main function of a decoder is to change a code into a set of signals because it is opposite to an encoder, but the designing decoders is simple. The circuit shows the 1 to 2 demultiplexer schematic. The below is the truth table for 1 to 2 demultiplexer with “I” as input data, D0 and D1 are the output data line and A is the selection line. A decoder is used to select among many devices whereas a demultiplexer is used to send the signal to many devices. ![]() DemuxĭEMUX is used when the circuit wishes to send the data signal to one of the many devices. A DEMUX gives ‘2n’ outputs for ‘n’ selection lines with a single input. A DEMUX converts the input serial data line into output parallel data. It is also called as a DEMUX or a data distributor. It is the reverse process of a multiplexer. A demultiplexer takes one single input data and then selects any one of the single output lines one at a time. ![]() 1 to 2 Decoder CircuitĪ demultiplexer is a device that takes a single input and gives one of the several output lines. The circuit shows the 1 to 2 decoder logic. ![]()
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