HD74AC153

2

Logic Symbol

Pin Names

I

I

S

Common Select Inputs

E

a

Side A Enable Input

E

b

Side B Enable Input

Z

a

Side A Output

Z

b

Side B Output

Functional Description

The HD74AC153 is a dual 4-input multiplexer. It can select two bits of data from up to four sources under

the control of the common Select inputs (S

The two 4-input multiplexer circuits have individual

active-Low Enables (

E

E

The HD74AC153 is the logic

implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic

levels supplied to the two Select inputs. The logic equations for the outputs are shown below.

Z

Z