Multiplexer 141201162448 Conversion Gate01

7/24/2019 Multiplexer 141201162448 Conversion Gate01

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Multiplexer / De-

multiplexer


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Multiplexer / De-multiplexer

3

This presentation will demonstrateThe basic function of the Multiplexer (MUX).

The typical application of a MUX.

!-to-" MUX desi#ned with $mall $cale %nte#ration

($$%).

!-to-"& '-to-"& "-to-" Medium $cale %nte#ration(M$%) MUX.

The basic function of the Demultiplexer (D*MUX).

The typical application of a D*MUX.

"-to-! D*MUX desi#n with $mall $cale %nte#ration($$%).

"-to-!& "-to-'& "-to-" Medium $cale %nte#ration(M$%) D*MUX.


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,hat is a Multiplexer (MUX)?

MUX is a di#ital switchthat has multiple inputs(sources) and a sin#leoutput (destination).

The select lines determinewhich input is connectedto the output.

MUX Types-to-" (" select line)

!-to-" ( select lines)

'-to-" (3 select lines)

"-to-" (! select lines)

!

Multiplexer.loc Dia#ram

$elect0ines

%nputs(sources)

1utput(destination)

12N

N

MUX


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Typical pplication of a MUX

2

M3 layerDocin# $tation

0aptop$ound 4ard

Di#ital$atellite

Di#ital4able T5

$urround $ound $ystem

MUX

D0

D1

D2

D3

Y

. $elected$ource

0 0 M3

0 1 0aptop

1 0 $atellite

1 1 4able T5

Multiple $ources $in#leDestination

$elector


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4-to-" Multiplexer (MUX)

. 6

0 0 D7

0 1 D"

1 0 D

1 1 D3

MUX

D7

D"

D

D3

6

.


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4-to-" Multiplexer,a8eforms

+

D7

D"

D

D3

.

%nputData

$elect0ine

1utputData


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Medium $cale %nte#rationMUX

'

8-to-" MUX 16-to-" MUX

%nputs

$elect

*nable

1utput (6))and in8erted

output(


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Handout(")


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,hat is a De-multiplexer(D*MUX)?

D*MUX is a di#italswitch with a sin#le input(source) and a multipleoutputs (destinations).

The select linesdetermine which outputthe input is connected to.

D*MUX Types"-to- (" select line)

"-to-! ( select lines)

"-to-' (3 select lines)

"-to-" (! select lines)

"7

Demultiplexer.loc Dia#ram

$elect0ines

%nput(source)

1utputs(destinations)

2N1

N

D*MUX


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Typical pplication of a D*MUX

""

$in#le $ource MultipleDestinations

$elector

D0

D1

D2

D3

X

D*MUX

. $elected

Destination

0 0 ./, 0aser rinter

0 1 9ax Machine

1 0 4olor %n:et rinter

1 1 en lotter

./, 0aserrinter

4olor %n:etrinter

enlotter

9axMachine


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1-to-! De-Multiplexer (D*MUX)

"

. D7

D"

D

D3

0 0 X 0 0 0

0 1 0 X 0 0

1 0 0 0 X 0

1 1 0 0 0 X

D7

D"

D

D3

X

.

D*MUX


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1-to-! De-Multiplexer,a8eforms

"3

X

$7

$"

D7

D"

D

1utputData

$elect0ine

%nputData


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Medium $cale %nte#rationD*MUX

"!

1-to-! D*MUX 1-to-' D*MUX 16-to-" MUX

$elect

%nput )in8erted(

1utputs)in8erted(

;ote < Most Medium $cale %nte#rated (M$%) D*MUXs &lie the three shown& ha8e outputs that are in8erted=

This is done because it re>uires few lo#ic #ates to

implement D*MUXs with in8erted outputs rather thanno-in8erted outputs.


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$eein# %s ;1T lways.elie8in#

1ur li8es are ?lled withelectronic si#ns thatdisplay the time&temperature& or ball #ame

score= @owe8er& what wesee is not always what isreally happenin#.

%n fact for most displays&the indi8idual displayse#ments are cycledthrou#h so that only onedisplay is on at any #i8entime.

The cycle speed is so fast"2

di#icam-tech=com

br#precision=com

electronic-scoreboard=com

nu-mediadisplays=com/si#ns/time-

displays=php


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$imple Messa#e< ll $e#ments1n

"

The circuit to the ri#htuses four +-se#mentdisplays to display theword 4%1= %n this circuitall displays are

continuously illuminated&each displayin# one letterin the word.

Thou#h this methodwors& it is a 5*A6

ineBcient use of power=To illuminate the simplemessa#e 4%1 in thisway& "' se#ments mustbe continuously on.

4an you thin of anotherwa to dis la this

16


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Handout()


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Multiplexed Displays$e#ments

%n this circuit the displayse#ments are multiplexed&meanin# that only one display ison at a time.

To display the entire word& thedisplays must be de-multiplexedusin# a "-to-! D*MUX.

%n this example the select linesthat control the D*MUX are

connected to two switches= 6oumust to##le 77& 7"& "7& "" to"'

Manual $elector MultiplexedDisplays

Demultiplexer

);ot ractical(


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0etCs $ee @ow %t ,ors

"

4lic $chematic to lay 5ideo


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4omplete Desi#n

7

This is a ripple counter(remember the dice

#ame).,e will learn how to

desi#n a ripple counter


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Multiplexer 141201162448 Conversion Gate01

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