USB

Host or Hub

D1M

D1P

D2M

D2P

Copyright © 2017, Texas Instruments Incorporated

11

TUSB215-Q1

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SLLSF07 – SEPTEMBER 2017

Product Folder Links: TUSB215-Q1

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Copyright © 2017, Texas Instruments Incorporated

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. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The primary purpose of the TUSB215-Q1 is to re-store the signal integrity of a USB High Speed channel up to

the USB connector. The loss in signal quality stems from reduced channel bandwidth due to high loss PCB trace

and other components that contribute a capacitive load. This can cause the channel to fail the USB near end eye

mask. Proper use of the TUSB215-Q1 can help to pass this eye mask. Additionally the DC Boost helps

overcoming DC losses from cables and traces.

A secondary purpose is to use the CD pin of the TUSB215-Q1 to control other blocks on the customer platform if

so desired. The TUSB215-Q1 also provides CDP controller function.

8.2 Typical Application

A typical application is shown in Figure 6. In this setup, D2P and D2M face the USB connector while D1P and

D1M face the USB host or hub. If desired, the orientation may be reversed [that is, D2 faces transceiver and D1

faces connector].

Figure 6. Typical Application