USB

Host or Hub

D1M

D1P

D2M

D2P

Copyright © 2017, Texas Instruments Incorporated

10

TUSB212

SLLSEX5A – AUGUST 2017 – REVISED SEPTEMBER 2017

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Product Folder Links: TUSB212

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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 TUSB212 is to re-store the signal integrity of a USB High Speed channel up to the

USB receptacle. 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 TUSB212 can help to pass this eye mask.

A secondary purpose is to use the CD pin of the TUSB212 to control other blocks on the customer platform if so

desired.

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

connector].

Figure 6. Typical Application

8.2.1 Design Requirements

For this design example, use parameters shown in the table below.

Table 3. Design Parameters

PARAMETER

VALUE

VCC (3.0V to 3.6V)

3.3 V

I2C support required in system (Yes/No)

No

AC Boost

REQ

Level

AC Boost Level 2:

REQ = 3.83 K

0 Ω

0

1.69 k ±1%

1

3.83 k ±1%

2

DNI

3