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In electronics, a multiplexer, also known as a data selector, is a device that selects between several analog or digital input signals and forwards the selected input to a single output line. The selection is directed by a separate set of digital inputs known as select lines. A multiplexer of 2 n {\displaystyle 2^{n}} inputs has n {\displaystyle n} select lines, which are used to select which inpu... Wikipedia