Decoders and Multiplexers

Decoders and Multiplexers are used in a wide variety of applications, including data multiplexing and data demultiplexing, seven segment displays, and memory address decoding. Depending on its function, a binary decoder will convert binary information from n input signals to as many as 2n unique output signals. Some decoders have less than 2n output lines. In such cases, at least one output pattern may be repeated for different input values. A multiplexer can be considered as a multiple-input, single-output switch, and a demultiplexer as a single-input, multiple-output switch.