A demultiplexer is a device that takes a signal containing multiple data streams and reconstructs the original separate streams. It works in reverse of a multiplexer, which combines multiple streams into one signal. Demultiplexers come in various types depending on the number of select lines, which determine how many output streams they can separate the combined signal into, from 1-to-2 up to 1-to-16. Common applications of demultiplexers include communication systems and converting serial to parallel signals.

3. What is de-multiplexer?
Demultiplex (DEMUX) is the reverse of the multiplex (MUX) process –
combining multiple unrelated analog or digital signal streams into one
signal over a single shared medium, such as a single conductor of copper
wire or fiber optic cable. Thus, demultiplex is reconverting a signal
containing multiple analog or digital signal streams back into the original
separate and unrelated signals.

4. Types of de-multiplexer
 1-to-2 (1 SELECT LINE)
 1-to-4 (2 SELECT LINES)
 1-to-8 (3 SELECT LINES)
 1-to-16 (4 SELEC T LINES)
A DE-MULTIPLEXER has:
- N control inputs
- 1 data input
- 2 to the power N OUTPUT
A de-multiplexer routes(or connects) the data input to selected output.
- The value of the control inputs determines the output that is selected.

5. 1-to-2 (1 select line)

6. 1-to-4 (2 select line)

7. 1-to-8 (3 select lines)

8. 1-TO-16 (4 SELECT LINES)

9. Typical application of de-multiplexer
 De- multiplexer is used to connect a single source to multiple destinations.
The main application are of the de-multiplexer is communication system
where multiplexer are used.
 communication System
 ALU (Arithmetic Logical unit)
 Serial to parallel converter

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