Multiplexer Report

TITLE : MULTIPLEXER INSTRUCTION AIMS: The trainees must be able to 1. Design function of Multiplexer 2. Donstruct the internal circuitry of Multiplexer TOOLS, EQUIPMENTS AND MATERIALS: 1. 2. 3. 4. 5.

Breadboard Power supply IC 7408, 7432, 7404, 7411(3 input AND gate), 74151 LED Jumper wires

DRAWING, DATA, TABLE Refer to pages with the procedure instruction GENERAL INSTRUCTION: A multiplexer is a device capable of funneling data lines into a single line transmission to another point. The multiplexer has two or more digital inputs signals connected to its input. Control signals are also input to hell which data-inputs line to select for transmission. D0 D1 D2 D3

Experiment 1 : 2 Line Multiplexer Procedure: 1. IC 7404, 7432, 7408 must be installed in the logic lab breadboard 2. the circuit was constructed as figure 1 3. Data must be set as switch like in multiplexer truth table. Output at LED must recorded in table 1

A 0 1 X X

INPUTS B X X 0 1

C 0 0 1 1 TABLE 1.

OUTPUTS 0 0 0 0

1(B) 1(B) 1(A) 1(A)

Experiment 2 : 4 Line Multipplexer. Procedure: 1. Ic 7411,7408,7404 was installed in the logic breadboard. 2. The circuit was construct in figure above . 3. Data must be set up as switch like input truth table ouput also must be record in table 2

.

INPUTS D0

D1

D2

D3

S0

S1

0 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1

0 0 1 1 0 0 1 1 0 0 0 0 1 1 1 1

0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1

0 0 0 0 0 0 0 0 1 1 0 1 0 1 0 1

0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0

0 0 1 1 1 1 1 1 0 0 0 0 1 1 1 1

OUTPUTS Input O/P statement 0 D0 0 D1 0 D2 0 D2 1 D2 1 D2 1 D2 1 D2 0 D1 0 D1 0 D1 0 D1 0 D2 0 D2 1 D2 1 D2

Experiment 3 : 8 Line multiplexer Procedure : 1. Ic 7415 multiplexer was installed in the logic lab breadboard. 2. 8 line multiplexer was constructed as shown in figure 3 3. Data must be set up as shown in table 3.Output LED also indications in table 3 U1

D0 D1 D2 D3 D4 D5 D6 D7 S0 S1 S2 E

4 D0 3 D1 2 D2 1 D3 15 D4 14 D5 13 D6 12 D7

LED1 ~W Y

6

LED2

5

11 A 10 B 9 C 7 ~G 74151N

INPUT E S2 S1 S0 D0 D1 D2 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 0 0 0 1 1 1 1 1 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 1 0 1 1 1 1 0 1 1 0 0 0 0 0 1 1 1 0 0 0

OUTPUT D3 D4 D5 D6 D70 L1 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 1 0 1 1 1 1 0 0 1 0 0 0 1 0 0 1 0 0 1 1 1 0 1 1 0 0 0 0 1 0 1 0 0 0 0 1 1 TABLE 2.

INPUTS STATEMENT D0 D1 D1 D2 D3 D3 D4 D5 D5 D6 D7

CONCLUSION: In this experiment we learn to design the function of Multiplexer and construct the internal circuitry of Multiplexer. Multiplexer is also known as the data selector. QUESTION : 1. Why is a multiplexer sometimes called a data selector Because it can control or choose inputs data to sent for control line or the input line choose to used it. 2. The circuit of a DEMUX is basically the same as for a decoder (TRUE/ FALSE)