Evaluation of redriver switch supporting USB 3.1, 10Gbps "TUSB1042EVM"

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Product Pickup Interface Texas Instruments

What is "TUSB1042I" for USB Type-C that suppresses distortion/signal loss in the transmission line?

TUSB1042I is a re-driving switch for USB Type-C that supports USB 3.1 Gen2 (10Gbps) provided by Texas Instruments.

A built-in redriver suppresses distortion/signal loss in the transmission path, and enables high bit rate transfer of USB 3.1 and 10 Gbps.

Article header library 128061 pic01 1 — Left: Simplified Schematic, Right: TSUB1042I Eye Diagram

Signals traveling through transmission lines are subject to distortion/signal loss. The higher the bit rate, the greater the above effects, and the signal quality deteriorates. UBS 3.1 Gen2 requires a high bitrate of 10Gbps. Ensuring signal quality is important when building a system.

The TUSB1042I has the following major features.

Redriver switch for USB Type-C
Supports USB 3.1 Gen1/Gen2
Equipped with equalization function up to 14db
Hot-pluggable
Temperature range -40°C to 85°C
small package

Each feature is explained below.

1. Redriver switch for USB Type-C

This is a 2:1 switch with a built-in redriver for USB Type-C, which is expected to become the mainstream of USB interfaces in the future.

2. Support USB 3.1 Gen1/Gen2

Supports USB 3.1 Gen1 5Gbps, USB 3.1 Gen2 10Gbps transfer.

3. Equipped with equalization function up to 14db

This feature can be used to compensate for channel insertion loss and intersymbol interference. 16 levels of equalization settings are possible according to the channel loss. It compensates for signal loss in the transmission path and enables high bitrate transfer up to 10Gbps with USB 3.1.

Article header library 128061 pic02 1 — eye pattern

4. Hot-pluggable

The TUSB1042I supports hot plugging, so you can plug and unplug the USB while the power is on.

5. Temperature range -40℃~85℃

The temperature range covers the industrial temperature range of -40°C to 85°C.

6. Small package

4mm x 6mm WQFN package.

"TUSB1042EVM" evaluation module for immediate evaluation

The TUSB1042EVM is an evaluation module for evaluating the TUSB1042I.

Article header library 128061 pic03 1 — TUSB1042EVM Evaluation Module

You can start evaluating the TUSB1042I immediately with the following 3 steps.

Step 1. Setting up the evaluation board

The most common evaluation methods are described here.
First, make the following preparations.

1 USB host
Two TUSB1042EVM evaluation modules
1 USB slave/device

Set up the evaluation module as shown in the image below.

Article header library 128061 pic04 1 — Setup method

Step 2. Power supply from host via USB Type-B

The TUSB1042EVM evaluation module does not require an external power supply. Power can be supplied from the host via USB Type-B.

Article header library 128061 pic05 1 — Evaluation module schematic

Step 3. Individual Equalizer Settings

Below are the default equalizer settings. Optimize according to channel transmission loss.

Article header library 128061 pic06 1 — Default equalizer settings

Gain settings for Downstream and Upstream can be set in the following 16 ways.

Article header library 128061 pic07 1 — List of equalizer settings

Application example

Tablet
notebook computer, desktop computer
All-in-one docking station

Article header library 128061 pic08 1 — Application example

Product Summary

Type name	TUSB1042I
Features	USB Type-C 2:1 Redriver Switch Up to 10Gbps with USB 3.1 Gen 1/Gen 2 Ultra-low power architecture Linear redriver with up to 14dB equalization Industrial temperature range: -40°C to 85°C 4mm × 6mm, 0.4mm pitch WQFN package