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8

TUSB211, TUSB211I

SLLSEO0D – MAY 2015 – REVISED OCTOBER 2017

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Copyright © 2015–2017, 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 TUSB211 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 TUSB211 can help to pass this eye mask.

A secondary purpose is to use the CD pin and ENA_HS pin of the TUSB211 to control other blocks on the

customer platform if so desired.

8.2 Typical Application

A typical application is shown below. In this setup, D1P and D1M face the USB connector while D2P and D2M

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

connector].

Note that CD and ENA_HS are connected to PLDs. This is for platforms where other circuit blocks must be

modified based on the status of the USB channel. They could also be connected to LEDs to give a physical

indication of current channel status for debug purposes. If neither use is desired, they can be left floating.

Figure 1. Reference Schematic