SLLSFZ7 February   2025 TUSB1146-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Power Supply Characteristics
    6. 5.6  Control I/O DC Electrical Characteristics
    7. 5.7  USB and DP Electrical Characteristics
    8. 5.8  Timing Requirements
    9. 5.9  Switching Characteristics
    10. 5.10 Typical Characteristics
  7.   Parameter Measurement Information
  8. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 USB 3.2
      2. 6.3.2 DisplayPort
      3. 6.3.3 4-Level Inputs
      4. 6.3.4 Receiver Linear Equalization
    4. 6.4 Device Functional Modes
      1. 6.4.1 Device Configuration in GPIO Mode
      2. 6.4.2 Device Configuration In I2C Mode
      3. 6.4.3 DisplayPort Mode
      4. 6.4.4 Linear EQ Configuration
      5. 6.4.5 Linearity VOD
      6. 6.4.6 VOD Modes
        1. 6.4.6.1 Linearity VOD
        2. 6.4.6.2 Limited VOD
      7. 6.4.7 Transmit Equalization
      8. 6.4.8 USB3.2 Modes
      9. 6.4.9 Downstream Facing Port Adaptive Equalization
        1. 6.4.9.1 Fast Adaptive Equalization in I2C Mode
        2. 6.4.9.2 Full Adaptive Equalization
        3. 6.4.9.3 Full Adaptive Equalization in GPIO Mode (I2C_EN = "F")
    5. 6.5 Programming
      1. 6.5.1 Transition Between Modes
      2. 6.5.2 Pseudocode Examples
        1. 6.5.2.1 Fast AEQ With Linear Redriver Mode
        2. 6.5.2.2 Fast AEQ With Limited Redriver Mode
        3. 6.5.2.3 Full AEQ With Linear Redriver Mode
        4. 6.5.2.4 Full AEQ With Limited Redriver Mode
      3. 6.5.3 TUSB1146-Q1 I2C Address Options
      4. 6.5.4 TUSB1146-Q1 I2C Target Behavior
  9. 7 Register Maps
    1. 7.1 TUSB1146-Q1 Registers
  10. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 USB and DP Upstream Facing Port (USB Host / DP GPU to USB-C Receptacle) Configuration
        2. 8.2.2.2 USB Downstream Facing Port (USB-C Receptacle to USB Host) Configuration
          1. 8.2.2.2.1 Fixed Equalization
          2. 8.2.2.2.2 Fast Adaptive Equalization
          3. 8.2.2.2.3 Full Adaptive Equalization
        3. 8.2.2.3 ESD Protection
      3. 8.2.3 Application Curve
    3. 8.3 System Examples
      1. 8.3.1 USB 3.1 Only
      2. 8.3.2 USB 3.1 and 2-Lane DisplayPort Mode
      3. 8.3.3 DisplayPort Only
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  11. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  12. 10Revision History
  13. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information
    2. 11.2 Mechanical Data

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.4.6.2 Limited VOD

Limited VOD mode is used to set the actual VOD level and is used when the TUSB1146-Q1 is configured in limited redriver mode. In this mode the VOD is no longer a linear function of the input VID. For example, if the signal at TUSB1146-Q1 input (VID) is at 600mVpp then the TUSB1146-Q1 output VOD is approximately 1000mVpp (assuming LINR_L3 is selected). The limited redriver mode is only supported in the upstream direction (RX1 → SSRX and RX2 → SSRX). The downstream paths always operate in linear redriver mode. Limited redriver mode can be enabled by I2C register. This mode is not supported in GPIO mode. The TUSB1146-Q1 provides four different limited VOD settings. All four settings are available through register control.