Multiplexer The multiplexer is a device that has multiple inputs and a single-line output. The select lines determine which input is connected to the output, and also increase the amount of data that can be sent over a network within a certain time. It is also called a data selector. The single pole multi-position switch is a simple example of a non-electronic circuit of the multiplexer. Multiplexers are capable of handling both analog and digital applications. In analog applications, multiplexers are made up of relays and transistor switches, whereas in digital applications, the multiplexers are built from standard logic gates. When the multiplexer is used for digital applications, it is called a digital multiplexer. Multiplexer Types Multiplexers are classified into four types: 2-1 multiplexer (I select line) 4-1 multiplexer (2 select lines) .8-1 multiplexer (3 select lines) 16-1 multiplexer (4 select lines) Multiplexer Applications A Multiplexer is used in various applicati