TUSB1142 datasheet(18/55 Pages) TI

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7 Detailed Description

7.1 Overview

The TUSB1142 is a 10 Gbps USB 3.2 linear redriver with 1:2 DeMUX or 2:1 Mux function for USB-C

applications. The TUSB1142 is intended to reside between a Host and a USB-C receptacle or between a USB

device and a USB-C receptacle. The TUSB1142 supports both USB 3.2 Gen2 (10 Gbps) and Gen1 (5 Gbps) as

well as USB 3.2 low power states (Disconnect, U1, U2, and U3).

The TUSB1142 supports up to 16 receiver equalization settings controlled by either pin-strap pins or through I2C

registers. The USB connector facing receivers (CRX1 and CRX2) support three equalization modes: Fixed EQ,

Fast AEQ, and Full AEQ. Selection between these modes is done through either pin-strap pins or through I2C

regisrers. The other receivers (SSTX) only support Fixed EQ.

The TUSB1142 operates as a linear redriver for signals traversing from the SSTX receivers towards CTX1/2

transmitters. It can operate as either a linear redriver or limited redriver for signals traversing from CRX1/2

receivers towards SSRX transmitters. TUSB1142 defaults to linear redriver but can be enabled for limited

redriver by I2C register. When enabled for limited redriver, the SSRX transmitter support four levels of pre-shoot

and four-levels of de-emphasis.

TUSB1142

SLLSFL2 – APRIL 2022

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TUSB1142 Datasheet(PDF) 18 Page - Texas Instruments