SLLSFB2 April 2020 TUSB1146
PRODUCTION DATA.
The TUSB1146 is a VESA USB Type-C Alt Mode redriving switch supporting data rates up to 10 Gbps for downstream facing port. The device utilize 5th generation USB redriver technology as well as new innovative adaptive equalization feature on its DFP receivers. The device is utilized for DFP configurations C, D, and E from the VESA DisplayPort Alt Mode on USB Type-C.
The TUSB1146 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 2.0 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 TUSB1146 enables the system to pass both transmitter compliance and receiver jitter tolerance tests for USB 3.1 Gen1/Gen2 and DisplayPort version 2.0 (up to UHBR10). 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 TUSB1146 receivers. Independent equalization control for each channel can be set using EQ[1:0], SSEQ[1:0], and DPEQ[1:0] pins.
The TUSB1146 advanced state machine makes it transparent to hosts and devices. After power up, the TUSB1146. 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 TUSB1146 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.