:PROPERTIES: :ID: 5bab9384-ba77-4473-809b-a107b207caf7 :mtime: 20231013033000 :ctime: 20231013032908 :END: #+title: demultiplexer #+filetags: :project:public: * Definition In digital electronics a *demultiplexer* directs a single input to exactly one of its multiple outputs based on a control. A demultiplexer is the opposite of a [[id:39a06559-ef08-4a8a-834c-961e66ea8b54][multiplexer]]. For example, in a 1-to-2 demultiplexer with input $g$, outputs $f_0, f_{1}$ and control $x$, we have that if $x = 1$ then $g = f_1$ and if $x = 0$ then $g = f_0$. * Relation to a [[id:4ec13977-a4fa-4d98-b842-89623ba10e99][Decoder]] A decoder is the same thing as a demultiplexer, except in a decoder, the input is constantly $g = 1$.