Electronics Multiplexer with TTL IC 74251 | Electronic Circuits

Electronics Multiplexer with TTL IC 74251

Circuit Multiplexer with TTL IC 74251 schematics Circuit Electronics,
Actually you can not bother to design a multiplexer using logic gates because it has many special IC which functioned for a multiplexer.

One of the TTL ICs from the family that you can use to fulfill the function of a multiplexer is IC 74 251. At the IC there are 8 input channels and 3-bit selector and the other lane as a control reset and inverting output. As a note if you are using TTL ICs for your electronic circuit, the voltage supply that is allowed a maximum of 5 volts. So you can be more familiar with the workings of this multiplexer ic, IC74251 consider the truth table below:


C

B

A

G

Y

W

X

X

X

1

Z

Z

0

0

0

0

D0

D0’

0

0

1

0

D1

D1’

0

1

0

0

D2

D2’

0

1

1

0

D3

D3’

1

0

0

0

D4

D4’

1

0

1

0

D5

D5’

1

1

0

0

D6

D6’

1

1

1

0

D7

D7’

Z = High impedance (off)

D0,D1…D7 = Representing the output of the input lines D



Schematics for Multiplexer with TTL IC 74251 Circuit Electronics

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