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2

Functional Description

The AC/ACT153 is a dual 4-input multiplexer. It can select

two bits of data from up to four sources under the control of

which can be used to strobe the outputs independently.

logic implementation of a 2-pole, 4-position switch, where

the position of the switch is determined by the logic levels

supplied to the Select inputs. The logic equations for the

outputs are shown below.

Truth Table

H

= HIGH Voltage Level

L

= LOW Voltage Level

X

= Immaterial

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

Select

Inputs (a or b)

Output

Inputs

E

Z

XX

H

XXX

X

L

LL

LL

X

X

X

L

LL

L

H

X

X

X

H

HL

L

X

L

X

X

L

HL

L

X

H

X

X

H

LH

L

X

X

L

X

L

LH

L

X

X

H

X

H

HH

L

X

X

X

L

L

HH

L

X

X

X

H

H