1. Multiplexers and Demultiplexers

2. Design of a 2/1 Mux 2/1 mux Block Diagram Truth Table S D1 D0 O 0 0 0 1 D0 O D1 S

3. Design of 2/1 Mux Continued
K-Map SA 00 01 11 10 B 1 1 1 1 1
O = S’A + SB

4. 4/1 Mux
Circuit

5. Uses of Multiplexers
Used 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

6. Function Generation using Multiplexers
Given the following truth table use an 8/1 Mux to generate F
Block Diagram
A B C F 1 1 F 1 1 1 S2 S1 S0 A B C

7. Function Generation Continued
Generate the previous F using a 4 to 1 Mux C’ F C 1 S1 S0 A B

8. 1 to 2 Demultiplexer Truth Table Circuit S D 01 O0 0 0 0 0 0 1 0 1 1
0 0
0 1 1