TUSB1146 datasheet(21/69 Pages) TI1

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6 Detailed Description

6.1 Overview

The TUSB1146-Q1 is a VESA DisplayPort Alt Mode over USB Type-C redriving switch that supports DisplayPort

data rates up to 10Gbps for downstream facing port. The device uses 5th generation USB redriver technology .

The device is used for DFP configurations C, D, and E from the VESA DisplayPort Alt Mode over USB Type-C.

The TUSB1146-Q1 provides several levels of receive equalization to compensate for cable and board trace loss

due to inter-symbol interference (ISI) when USB 3.2 or DisplayPort 2.1 signals travel across a PCB or cable. The

TUSB1146-Q1 requires a 3.3V power supply and comes in an Automotive Grade 2 temperature range.

For a host application, the TUSB1146-Q1 enables the system to pass both transmitter compliance and receiver

jitter tolerance tests for USB 3.2 and DisplayPort version 2.1. The redriver recovers incoming data by applying

equalization that compensates for channel loss, and drives out signals with a high differential voltage. Each

channel has a receiver equalizer with selectable gain settings. Set the equalization based on the amount of

insertion loss before the TUSB1146-Q1 receivers. Independent equalization control for each channel can be set

using EQ[1:0], SSEQ[1:0], and DPEQ[1:0] pins.

The TUSB1146-Q1 advanced state machine makes the device transparent to hosts and devices. After power

up, the TUSB1146-Q1 periodically performs receiver detection on the TX pairs. If the device detects a USB 3.2

receiver, the RX termination is enabled, and the TUSB1146-Q1 is ready to redrive.

The device ultra-low-power architecture operates at a 3.3V power supply and achieves enhanced performance.

The automatic LFPS de-emphasis control further enables the system to be USB3.2 compliant.

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TUSB1146-Q1

SLLSFZ7 – FEBRUARY 2025

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TUSB1146 Datasheet(PDF) 21 Page - Texas Instruments