Building a Programmable Logic Controller with a PIC16F648A Microcontroller

 

12 Demultiplexer Macros

 

A demultiplexer (DMUX) is used when a circuit is to send a signal to one of many devices. This description sounds similar to the description given for a decoder, but a decoder is used to select among many devices, while a demultiplexer is used to send a signal among many devices. However, any decoder having an enable line can function as a demultiplexer. If the enable line of a decoder is used as a data input, then the data can be routed to any one of the outputs, and thus in that case the decoder can be used as a demultiplexer As the name infers, a demultiplexer performs the opposite function as that of a multiplexer. A single input signal can be connected to any one of the output lines provided by the choice of ...