9 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.

9.1 Application Information

The SN74HCS151-Q1 is an 8-to-1 data selector/multiplexer. This application shows an example of using the

device with all required connections.

9.2 Typical Application

System

Controller

3:8

DECODER

A

B

C

G

GND

8:1

Multiplexer

D1

D2

D0

D4

D5

D3

D6

D7

Device 0

Device 1

Device 2

Device 3

Device 4

Device 5

Device 6

Device 7

Y

0.1…F

W

Figure 9-1. Typical application block diagram

9.2.1 Design Requirements

• All signals in the system operate at 5 V

• Avoid unstable state by not having LOW signals on both inputs

• Q output is HIGH when S is LOW

– Q output remains HIGH until R is LOW

9.2.1.1 Power Considerations

Ensure the desired supply voltage is within the range specified in the Recommended Operating Conditions. The

supply voltage sets the device's electrical characteristics as described in the Electrical Characteristics.

The positive voltage supply must be capable of sourcing current equal to the total current to be sourced by all

and any transient current required for switching. The logic device can only source as much current as is provided

Absolute Maximum Ratings.

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SN74HCS151-Q1

SCLS819B – AUGUST 2020 – REVISED DECEMBER 2021

Copyright © 2021 Texas Instruments Incorporated

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