7.4 Layout

7.4.1 Layout Guidelines

For device reliability, the following common printed-circuit board layout guidelines are recommended.

• Bypass capacitors should be used on power supplies, and should be placed as close as possible to the VCCA,

VCCB pin and GND pin.

• Short trace lengths should be used to avoid excessive loading.

• PCB signal trace-lengths must be kept short enough so that the round-trip delay of any reflection is less than

the one shot duration, approximately 10ns, making sure that any reflection encounters low impedance at the

source driver.

7.4.2 Layout Example

GND

B

VCCB

LEGEND

VIA to Power Plane

VIA to GND Plane (Inner Layer)

Polygonal Copper Pour

VCCA

1

2

3

A

Keep OE low until VCCA and VCCB

are powered up

6

5

4

Bypass Capacitor

Bypass Capacitor

OE

TXB0101

To/From

Controller/System

To/From

Controller/System

Figure 7-4. Layout Example Recommendation

www.ti.com

TXB0101

SCES639F – JANUARY 2007 – REVISED SEPTEMBER 2025

Copyright © 2025 Texas Instruments Incorporated

Submit Document Feedback

21

Product Folder Links: TXB0101