Multiplexers
Multiplexer is a special type of combinational circuit. There are n-data inputs, one output and m select inputs with 2m = n. It is a digital circuit which selects one of the n data inputs and routes it to the output. The selection of one of the n inputs is done by the selected inputs. Depending on the digital code applied at the selected inputs, one out of n data sources is selected and transmitted to the single output Y. E is called the strobe or enable input which is useful for the cascading. It is generally an active low terminal that means it will perform the required operation when it is low.
Multiplexers come in multiple variations
2 : 1 multiplexer
4 : 1 multiplexer
16 : 1 multiplexer
32 : 1 multiplexer
2 : 1 multiplexer
2 : 1 multiplexer
4 : 1 multiplexer
16 : 1 multiplexer
32 : 1 multiplexer
2 : 1 multiplexer
Demultiplexers
A demultiplexer performs the reverse operation of a multiplexer i.e. it receives one input and distributes it over several outputs. It has only one input, n outputs, m select input. At a time only one output line is selected by the select lines and the input is transmitted to the selected output line. A de-multiplexer is equivalent to a single pole multiple way switch as shown in fig.
Demultiplexers comes in multiple variations.
Demultiplexers comes in multiple variations.
- 1 : 2 demultiplexer
- 1 : 4 demultiplexer
- 1 : 16 demultiplexer
- 1 : 32 demultiplexer