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MC74AC153DTR2

Dual 4−Input Multiplexer

ON Semiconductor 

MC74AC153, MC74ACT153

Ea I0a I1a I2a I3a I0b I1b I2b I3b Eb

S0

S1

Za

Zb

Figure 2. Logic Symbol

Ea I0a

I1a

I2a

I3a

S1

FUNCTIONAL DESCRIPTION

The MC74AC153/74ACT153 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 MC74AC153/74ACT153 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)

S0

I0b

I1b

I2b

I3b Eb

Za

Zb

NOTE:

This diagram is provided only for the understanding of logic

operations and should not be used to estimate propagation

delays.

Figure 3. Logic Diagram

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