TUSB1044AI datasheet(19/66 Pages) TI1

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7 Detailed Description

7.1 Overview

The TUSB1044A is a USB Type-C Alt Mode redriver switch supporting data rates up to 10.0Gbps. This device

implements 5th generation USB redriver technology. The device is used for configurations C, D, E, and F from

the VESA® DisplayPort™ Alt Mode on USB Type-C Standard. The device can also be configured to support

custom USB Type-C alternate modes.

The TUSB1044A provides several levels of receive equalization to compensate for cable and board trace loss

due to inter-symbol interference (ISI) when USB 3.2 Gen 2 or DisplayPort (or other Alt modes) signals travel

across a PCB or cable. This device requires a 3.3V power supply. The device comes for both commercial

temperature range and industrial temperature range operation.

For host (source) or device (sink) applications, the TUSB1044A enables the system to pass both transmitter

compliance and receiver jitter tolerance tests for USB 3.2 Gen 2 and DisplayPort version 2.1 UHBR10. 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.

Equalization control for upstream and downstream facing ports can be set using UEQ[1:0], and DEQ[1:0] pins

respectively or through the I2C interface.

Moreover, the CFG[1:0] or the equivalent I2C registers provide the ability to control the EQ DC gain and the

voltage linearity range for all the channels (see also Table 7-9). This flexible control allows users to set up the

device to pass various standard compliance requirements.

The TUSB1044A advanced state machine makes the device transparent to hosts and devices. After power

up, the TUSB1044A periodically performs receiver detection on the TX pairs. If the device detects a USB 3.2

receiver, the RX termination is enabled, and the TUSB1044A is ready to re-drive.

The TUSB1044A provides extremely flexible data path signal direction control using the CTL[1:0], FLIP, DIR[1:0],

and SWAP pins or through the I2C interface. Refer to Table 7-5 for detailed information on the input-to-output

signal pin mapping.

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 USB 3.2 compliant.

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TUSB1044A

SLLSG07 – MARCH 2025

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TUSB1044AI датащи(PDF) 19 Page - Texas Instruments