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 purpose of the TUSB216I 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 TUSB216I can help to pass this eye mask.

A secondary purpose is to use the CD pin of the TUSB216I to control other blocks on the customer platform, if

so desired.

8.2 Typical Application

A typical application for TUSB216I is shown in Figure 8-1. In this setup, D2P and D2M face the USB connector

while D1P and D1M face the USB host. The orientation may be reversed [that is, D2 faces transceiver and D1

faces connector].

100 nF

R

BOOST

Supply

+3.3V or +5 V

1uF

(op onal)

100 nF

Vcc

R

RXSEN1

R

RXSEN2

USB

Host or Hub

CON_D2P

CON_D2N

USB_D1P

USB_D1N

Copyright © 2019, Texas Instruments Incorporated

RSTN

BOOST

D2P

D2M

RX_SEN/ENA_HS

GND

VCC

D1M

D1P

Ferrite Bead

100 @100MHz

Connect

D1P and D2P

Connect

D1M and D2M

Figure 8-1. TUSB216I Reference Schematic (Design Example with CDP disabled), CDP_ENZ can be left

floating but an option for a decoupling capacitor of 0.1uF is recommended so the design is compatible

with older devices: TUSB211, TUSB212, TUSB214

TUSB216I

SLLSFM9 – MARCH 2021

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Product Folder Links: TUSB216I