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Transcript of multiplexer 4 input
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Government Engineering College,Gandhinagar
Instrumentation and Control Engineering
Sub:-DLC(2131704)
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Acharya Manali 150130117001
Mistry Ankit 150130117002
Ic-A1
Prepared By:-
Topic :- Basic 4 Input Multiplexer
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WHAT IS MULTIPLEXER?• A MULTIPLEXER is a digital circuit that has
multiple inputs and a single output.• Multiplexer means many into one. • The selection of one of the n inputs is done by
the select inputs• It has one output selected at a time.• It is also known as DATA SELECTOR.• An simple example of an non electronic circuit of a
multiplexer is a single pole multi position switch.• A multiplexer has
N data inputs(multiple)1 output (single)M select inputs, with 2M =N
Single Pole Multi Position Switch
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BLOCK DIAGRAM OF MULTIPLEXER :
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Types : 2-to-1 (1 select line)
4-to-1 (2 select lines)
8-to-1 (3 select lines)
16-to-1 (4 select lines)
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4-to-1 Multiplexer:• The 4-to-1 multiplexer has 4 input bit, 2 control bits, and
1 output bit.
• The four input bits are I0,I1,I2 and I3. Only one of this is transmitted to the output y.
• The output depends on the value of S0 and S1 which is the control input.
• The control input determines which of the input data bit is transmitted to the output.
4-to-1 multiplexer
• Another example of 4-to-1 multiplexer is 45352 in which the output is the compliment of the input.
• An example of 4-to-1 multiplexer is IC 74153 in which the output is same as the input.
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4-to-1 Multiplexer
S1 S0 F
0 0 I0
0 1 I1
1 0 I2
1 1 I3
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4-to-1 (2 select lines) Multiplexer
4:1 MUX has 4 inputs(D0, D1, D2, D3) & 2 select lines(S0, S1)
S1 S0 Y
0 0 D0
0 1 D1
1 0 D2
1 1 D3
MU
XD0
D1
D2
D3
Y
S1 S0
BLOCK DIAGRAMTRUTH TABLE
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The logical level applied to the S input determines which AND gate is enabled, so that its data input passes through the OR gate to the output.
The output, Y=S1’S0’D0+S1’S0D1+S1SO’D2+S1S0D3
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Uses of MultiplexersUsed in data communications for several computers to
communicate over 1 line
Used in radio to select one channel from many
Used to route data within a computer
Used for function generation
Multi-position switches are widely used in many electronics circuits. However circuits that operate at high speed require the multiplexer to be automatically selected.
A mechanical switch cannot perform this task satisfactorily. Therefore, multiplexer used to perform high speed switching are constructed of electronic components.
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APPLICATION OF MULTIPLEXER:
MP3 PlayerDocking Station
Laptop Sound Card
DigitalSatellite
DigitalCable TV
Surround Sound System
MUX
D0
D1
D2
D3
Y
B A Selected Source
0 0 MP3
0 1 Laptop
1 0 Satellite
1 1 Cable TV
Multiple SourcesSingle
DestinationSelector
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• Multiplexer are used in various fields where multiple data need to be transmitted using a single line. Following are some of the applications of multiplexers
• Communication system
• Telephone network
• Computer memory
• Transmission from the computer system of a satellite
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