Copyright © 2018, Texas Instruments Incorporated

Microcontroller

Device A

Device B

TMUX154E

Control

A0

A1

V

CC

B0

B1

A

B

SEL

EN

13

TMUX154E

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SCDS379 – FEBRUARY 2018

Product Folder Links: TMUX154E

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Copyright © 2018, Texas Instruments Incorporated

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. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

There are many applications in which processors and microcontrollers have a limited number of I/Os. The

TMUX154E solution can effectively expand the limited number of I/Os by switching between multiple signal paths

in order to interface them to a single processor or microcontroller. TMUX154E can also be used to connect a

single microcontroller to two signal paths.

9.2 Typical Application

Figure 13. Application Diagram

9.2.1 Design Requirements

TI recommends that the digital control pins SEL and EN be pulled up to VCC or down to GND to avoid undesired

switch positions that could result from the floating pin.

9.2.2 Detailed Design Procedure

The TMUX154E can be properly operated without any external components. However, it is recommended that

unused pins be connected to ground through a 50-Ω resistor to prevent signal reflections back into the device.