PPT: Multiplexer (Data Selectors) | Analog and Digital Electronics - Electrical Engineering (EE) PDF Download

 Page 1


Multiplexer (data Selectors)
•
Definition : A multiplexers (MUX) is a device that allows digital 
information from several sources to be routed onto a single 
line for transmission over that line to a common destination. 
•
Several data input lines 
•
Some select line (less than the no. of input lines) 
•
Single output line
•
If there are n data input lines  and m select lines, then 
  2
m
 = n 
 
Page 2


Multiplexer (data Selectors)
•
Definition : A multiplexers (MUX) is a device that allows digital 
information from several sources to be routed onto a single 
line for transmission over that line to a common destination. 
•
Several data input lines 
•
Some select line (less than the no. of input lines) 
•
Single output line
•
If there are n data input lines  and m select lines, then 
  2
m
 = n 
 
Functional Diagram Of a Multiplexer 
Page 3


Multiplexer (data Selectors)
•
Definition : A multiplexers (MUX) is a device that allows digital 
information from several sources to be routed onto a single 
line for transmission over that line to a common destination. 
•
Several data input lines 
•
Some select line (less than the no. of input lines) 
•
Single output line
•
If there are n data input lines  and m select lines, then 
  2
m
 = n 
 
Functional Diagram Of a Multiplexer 
2 : 1 Multiplexer
S Z
0 I
0
1 I
1
Page 4


Multiplexer (data Selectors)
•
Definition : A multiplexers (MUX) is a device that allows digital 
information from several sources to be routed onto a single 
line for transmission over that line to a common destination. 
•
Several data input lines 
•
Some select line (less than the no. of input lines) 
•
Single output line
•
If there are n data input lines  and m select lines, then 
  2
m
 = n 
 
Functional Diagram Of a Multiplexer 
2 : 1 Multiplexer
S Z
0 I
0
1 I
1
4 : 1 Multiplexer
S
0
S
1
Z
0 0 I
0
0 1 I
1
1 0 I
2
1 1 I
3
Page 5


Multiplexer (data Selectors)
•
Definition : A multiplexers (MUX) is a device that allows digital 
information from several sources to be routed onto a single 
line for transmission over that line to a common destination. 
•
Several data input lines 
•
Some select line (less than the no. of input lines) 
•
Single output line
•
If there are n data input lines  and m select lines, then 
  2
m
 = n 
 
Functional Diagram Of a Multiplexer 
2 : 1 Multiplexer
S Z
0 I
0
1 I
1
4 : 1 Multiplexer
S
0
S
1
Z
0 0 I
0
0 1 I
1
1 0 I
2
1 1 I
3
8 : 1 Multiplexer
S
0
S
1
S
3
Z
0 0 0 I
0
0 0 1 I
1
0 1 0 I
2
0 1 1 I
3
1 0 0 I
4
1 0 1 I
5
1 1 0 I
6
1 1 1 I
7