Demultiplexers

A demultiplexer is a combinational circuit which is having one input, 2^n outputs and n select lines. The demultiplexer passes the binary data present on the input to any of the outputs depending upon the select lines. The output line in which data is passed is decided by the select line. Figure shows the block presentation of 1-to-4 demultiplexer and truth table of the demultiplexer when the input
is HIGH.

Demultiplexure Quiz:

Demultiplexure

1. For a 1:32 demultiplexer number of select lines is

a) 2

b)4

c) 5

d)32

2. Demux is also used for

a) data selector

b) data distributer

c) both of above

d) none of above

3. Which of the following DEMUX is most suitable for implementing full adder.

a) 1:8

b) 1:32

d)1:2

4. DEMUX is___________________ circuit

a) Combinational

b) Sequential

c) Memory Element

d) All of that above

5. f(a,b,c,d)=sum m(1,3,6,9,12,14)this function can be implemented using following demux?

a) 1:8

b)1:16

c)1:32

d)1:64

6. Relation between no of output(n) and select lines (m) in DEMUX is

a)n=2^m

b) m=2^n

c) n=2^(m-1)

d) n=(2^m)-1

7. Most demultiplexers facilitate which type of conversion?

a) decimal-to-hexadecimal

b) single input, multiple outputs

c) ac to dc

d) odd parity to even parity

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