TUSB546AI-DCI datasheet(14/49 Pages) TI1

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TUSB546A-DCI

SLLSF14 – JUNE 2017

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8 Detailed Description

8.1 Overview

The TUSB546A-DCI is a VESA USB Type-C Alt Mode redriving switch supporting data rates up to 8.1 Gbps for

downstream facing port. These devices utilize 5th generation USB redriver technology. The devices are utilized

for DFP configurations C, D, E, and F from the VESA DisplayPort Alt Mode on USB Type-C.

The TUSB546A-DCI provides several levels of receive equalization to compensate for cable and board trace loss

due to inter-symbol interference (ISI) when USB 3.1 Gen1 or DisplayPort 1.4 signals travel across a PCB or

cable. This device requires a 3.3-V power supply. It comes in a commercial temperature range and industrial

temperature range.

For a host application the TUSB546A-DCI enables the system to pass both transmitter compliance and receiver

jitter tolerance tests for USB 3.1 Gen 1 and DisplayPort version 1.4 HBR3. The re-driver 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. The equalization should be set

based on the amount of insertion loss before the TUSB546A-DCI receivers. Independent equalization control for

each channel can be set using EQ[1:0], SSEQ[1:0], and DPEQ[1:0] pins.

The TUSB546A-DCI advanced state machine makes it transparent to hosts and devices. After power up, the

TUSB546A-DCI. periodically performs receiver detection on the TX pairs. If it detects a USB 3.1 Gen1 receiver,

the RX termination is enabled, and the TUSB546A-DCI is ready to re-drive.

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

The automatic LFPS De-Emphasis control further enables the system to be USB3.1 compliant.

TUSB546AI-DCI Datasheet(PDF) 14 Page - Texas Instruments