USB

TRANSCEIVER

USB

CONNECTOR

ESD

PROTECTION

OPTIONAL

PLD

D1P

D1M

CD

ENA_HS

D2P

D2M

Low and Full

Speed Bypass

Status Flags

High Speed

Compensation

CDP Controller

9

TUSB214-Q1

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SLLSF36 – AUGUST 2017

Product Folder Links: TUSB214-Q1

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Copyright © 2017, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The TUSB214-Q1 is a USB High-Speed (HS) signal conditioner, designed to compensate for ISI signal loss in a

transmission channel. TUSB214-Q1 has a patent-pending design which is agnostic to USB Low Speed (LS) and

Full Speed (FS) signals and does not alter their signal characteristics, while HS signals are compensated. In

addition, the design is compatible with USB On-The-Go (OTG) and Battery Charging (BC) specifications. The

TUSB214-Q1 includes a USB BC Charging Downstream Port (CDP) controller.

Programmable signal gain through an external resistor permits fine tuning device performance to optimize signals

helping to pass USB HS electrical compliance tests at the connector. Additional DC boost configurable by three

level input DC_BOOST helps overcoming the cable losses.

The footprint of TUSB214-Q1 allows a board layout using this device such that it does not break the continuity of

the DP/DM signal traces. This permits risk free system design of a complete USB channel with flexible use of

one or multiple TUSB214-Q1 devices as needed for optimal signal integrity. This allows system designers to plan

for this device and use it only if signal integrity analysis and/or lab measurements sow a need. If such a need is

not warranted, the device can be left unpopulated without any board rework.

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 EQ

The EQ pin of the TUSB214-Q1 is used to configure the AC boost of the device. The four levels are set through

different values of an external pulldown resistor at this pin.

7.3.2 DC BOOST

The DC_BOOST pin of the TUSB214-Q1 is a tri-level pin, used to set the DC gain of the device according to

Table 1.

Table 1. DC Boost Settings

DC BOOST SETTING VIA PIN STRAP

DC_BOOST

DC Boost Setting (mV)

40

60

80