Question

Lab #7-8 Objectives: 1. To understand Multiplexers and De-multiplexers. 2. To implement a basic multiplexer using AND, OR, and NOT, gates. 3. To verify the operation of Integrated Mulitplexers. Equipment: Digital Multi-meter, Breadboard, Power Supply, Function Generator, Oscilloscope. Components: 7404, 7408, 7432, 74151, 74138, LEDs, Resistors Procedure:

answer as u can

make it up

Answer 1

Q.) 1:2 DEMUX Ans: Yo Coutput) Suput) I - DEMUX ·y, Coutput) so (Select line) Truth Table E so I 0 - . - a 10 OOHO OOOH • Boolean Expression So=&5. I 2 Y = ES. I J were so = 0 & Sons of AND gate IC Number Pin Number used : 7408 - : 4 (No. of getes in engle Ic) & NOT gute used : 7404 IC Pin number number

• Schematic Diagram of 1:2 DEMUX • Function of the cirunt. - DEMUX cuts as a data distributor. - 1:2 Demux distribute single input to two outputs. using a select line (so). - Ciruit works only when El Enable) is high. - When select line is o input (I) is distributed avros (Yo). when select the is I input (I) is distributed aurus (141). Schematic diagram is made on basis of bookean. expression. we use 2 and gates and 1 Not guite in diagram to get outputs to and Y.

• 1:4 DEMUX ly DENUX s, so Truth Table Don't care condition X can bo loro Se 1 Yo Y, Y₂ 43 wloo -- x x o 61* xloo - - - ° 0 Ho 0 1 0 0 1 1 1 ooo 0 H 0 1 0 0 0 0 0 I 0 Boolean Expression Yo = 5$,I ; y, - 5. soli 925 S501; Y3 = S, S. I

• Schematic Diagram of li4 DEMUX l S. yo

• Pin Configuration of 74138? → 74138 is a 3:8 decoder. S input ping Decoder ļ 8 output pins (Enable line) - EN 3x8 Vec- (Power supply) OUND Couround) Operation – 3x8 Duoder translate 3 bits to 2² = 8 bits It's just converting binary information from One form to other. - Binary inputs A,B &c determine which output line from Do to Do is 1(High), while remaining are low (o).

to truth Table A o B o C o D, D, D, o o D, D, D, D, o o o o o - о - - оо о - о -