The document discusses multiplexers and demultiplexers. It defines them as combinational circuits: multiplexers have multiple inputs but a single output, while demultiplexers have a single input but multiple outputs. It provides an example of how they work by taking multiple signals and transmitting them through a single channel. The document also lists some common uses of multiplexers, such as in telephone networking and computer memory, and uses of demultiplexers such as in communication systems and storing ALU outputs in registers.

1. Digital Fundamental
Multiplexer & Demultiplexer
Name:-Parmar Akash
En no.:-12102080701004
Name:-Patel Avi
En no.:-12102080701013

2. • Multiplexer:-Multiplxer refers to a type of
combinational circuit that accepts multiple
inputs of data but provides only single output.
• An alternative name of the multiplexer is MUX
or data selector.
• Demultiplexer:-Demultiplxer refers to a type of
combinational circuit that accepts only single
inputs of data but provides multiple output.
• An alternative name of the multiplexer is
DEMUX or data selector.

3. M
U
X
D
E
M
U
X
Signal 1
Signal 2
Signal 3
Signal 1
Signal 2
Signal 3
Transmission
Channel
Multiplexer & Demultiplexer
Multiplexer
X0
X1
X2
Many
Inputs
Xn
C1 C0
Y
Single
Output
De-
Multiplexer
C1 C0
X
Y0
Y1
Y2
Yn
Single
Inputs
Many
Output

4. ➢ Use of Multiplexers
1.Telephone networking: In telephonic networking, several signals
are integrated into one signal audio signal, with the help of
multiplexers.
2.Memory in the Computers: Multiplexers transmit huge memories
into the computer while reducing the total copper lines for
connecting the memory to different parts in the computer circuit.
3.Communication system: The efficiency of the Communication
styles is incremented by the application of Multiplexers. It helps in
transmitting several types of data into a single transmission line.
4.Multiplexers help in the transmission of data signals of
satellites through GPS Satellites.

5. ➢ Use of Demultiplexers
1.Demultiplexers are used in Communication systems. The
communication system is bi-directional. They are used to
transmit several data through a single transmission line.
2.Multiplexers and Demultiplexers are often worked in
sync.
3.With the help of Demultiplexer, the output of the
Arithmetic Logic Unit is stored in several registers. These
outputs are inserted into the Demultiplexers as inputs.
4.Demultiplexers are used in aligning the parallel converter.

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