demultiplexar

A demultiplexer, often called a demux, is a combinational logic circuit that takes a single input data line and routes it to one of several output lines. The selection of which output line receives the input is controlled by a set of select lines. Essentially, it performs the reverse operation of a multiplexer. A demultiplexer can be thought of as a data distributor.

The number of output lines in a demultiplexer is typically a power of two, corresponding to the number of select lines. For example, a demultiplexer with n select lines can have up to 2^n output lines. Each unique combination of the select line inputs corresponds to a unique output line being enabled. When an output line is enabled, it receives the data from the single input line. All other output lines remain inactive or are set to a default state, usually logic low.

Demultiplexers are commonly used in digital systems for various purposes. They can be employed in communication systems to direct data from a single source to multiple destinations. In computer architectures, they are used in memory addressing to select specific memory locations or devices. They are also fundamental building blocks in digital signal processing and control systems where routing of information is crucial. The basic operation relies on decoding the select line inputs to activate a specific output gate.