8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

The CD74ACT157 is a quadruple 2-to-1 data selector/multiplexer. The following application shows an example

of using the device with all required connections to switch a 4-bit data bus between two source devices.

8.2 Typical Application

System

Controller

A/B

G

GND

2:1

Mux

1B

1A

Device 0

Device 1

VCC

0.1…F

4Y

VCC

D0A

D0B

D0C

D0D

D1A

D1B

D1C

D1D

DXA

DXB

2:1

Mux

2:1

Mux

2:1

Mux

2B

2A

3B

3A

4B

4A

3Y

2Y

1Y

DXC

DXD

D0A

D0B

D0C

D0D

D1A

D1B

D1C

D1D

Figure 8-1. Typical Application Block Diagram

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CD74ACT157

SCHS340D – MARCH 2003 – REVISED JULY 2025

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