8.1 Overview

The TUSB1046A-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 5^th 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 TUSB1046A-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/Gen2 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 TUSB1046A-DCI enables the system to pass both transmitter compliance and receiver jitter tolerance tests for USB 3.1 Gen1/Gen2 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 TUSB1046A-DCI receivers. Independent equalization control for each channel can be set using EQ[1:0], SSEQ[1:0], and DPEQ[1:0] pins.

The TUSB1046A-DCI advanced state machine makes it transparent to hosts and devices. After power up, the TUSB1046A-DCI. periodically performs receiver detection on the TX pairs. If it detects a USB 3.1 Gen1/Gen2 receiver, the RX termination is enabled, and the TUSB1046A-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.