Test: Demultiplexers - 1 - Electrical Engineering (EE) MCQ

The word demultiplex means “one into many” and distributor. A demultiplexer sends a single input to multiple outputs, depending on the select lines. It is clear from the diagram:

A demultiplexer sends a single input to multiple outputs, depending on the select lines. Demultiplexer converts single input into multiple outputs.

A demultiplexer sends a single input to multiple outputs, depending on the select lines. As the select input changes, the output of the multiplexer varies according to that input.

The number of AND gates required will be equal to the number of outputs in a demultiplexer, which are 8.

IC 74154 is used for the implementation of 1-to-16 DEMUX, whose output is inverted input.

A demultiplexer sends a single input to multiple outputs, depending on the select lines. For one input, the demultiplexer gives several outputs. That is why it is called a data distributor.

The formula for total no. of outputs is given by 2n, where n is the no. of select lines. Therefore, for 1:4 demultiplexer, 2 select lines are required.

It can be calculated from the figure shown below:

For C₀ =1 and C₁ = 0, Y₁ will be the output as 0 and 1 are the bit combinations of 1.

The formula for total no. of outputs is given by 2ⁿ, where n is the no. of select lines. In this case n = 3 since 2³ = 8.

The output Y₄ = Q₂.(Q₁)’.(Q₀)’.I. since the bit combinations of 4 are 100.