74AC153 查看數據表（PDF） - Hitachi -> Renesas Electronics

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74AC153

Dual 4-Input Multiplexer

Hitachi -> Renesas Electronics 

HD74AC153

Logic Symbol

Ea I0a I1a I2a I3a I0b I1b I2b I3b Eb

S0

S1

Za

Zb

Pin Names

I0a to I3a Side A Data Inputs

I0b to I3b Side B Data Inputs

S0, S1 Common Select Inputs

Ea

Side A Enable Input

Eb

Side B Enable Input

Za

Side A Output

Zb

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 (S0, S1). The two 4-input multiplexer circuits have individual

active-Low Enables (Ea, Eb) which can be used to strobe the outputs independently. When the Enables (Ea,

Eb) are High, the corresponding outputs (Za, Zb) are forced Low. 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.

Za = Ea•(I0a•S1•S0 + I1a•S1•S0 + I2a•S1•S0 + I3a•S1•S0)

Zb = Eb•(I0b•S1•S0 + I1b•S1•S0 + I2b•S1•S0 + I3b•S1•S0)

2

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