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The demultiplexer is a combinational logic circuit for switching from one standard input line to several different output lines.
The data distributor is the exact reverse of the Multiplexer that we saw in the previous tutorial, most generally known as a Demultiplexer or “Demux” for short.
The demultiplexer takes one continuous data line input, and then one at a time, moves it to each of a variety of individual output lines. As shown below, the demultiplexer transforms a serial data signal at the input to parallel data on its output row.