SNLS766A July   2024  – April 2026 TDP20MB421

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 DC Electrical Characteristics
    6. 5.6 High-Speed Electrical Characteristics
    7. 5.7 SMBUS/I2C Timing Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 5-Level Control Inputs
      2. 6.3.2 Linear Equalization
      3. 6.3.3 Flat Gain
    4. 6.4 Device Functional Modes
      1. 6.4.1 Active Mode
      2. 6.4.2 Standby Mode
    5. 6.5 Programming
      1. 6.5.1 Pin Mode
      2. 6.5.2 SMBUS/I2C Register Control Interface
        1. 6.5.2.1 Shared Registers
        2. 6.5.2.2 Channel Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 DP 2.1 and HDMI 2.1 Mainlink Signal Conditioning
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.1 Overview

The TDP20MB421 is a 4-channel linear redriver with an integrated 2:1 MUX. The low-power, high-performance linear repeater or redriver supports DisplayPort data rates up to UHBR20 and AC-coupled HDMI 2.1 Source up to 12Gbps. The device is a protocol agnostic linear redriver that can operate for other AC-coupled interface up to 24Gbps.

The signal channels of the TDP20MB421 operate independently. Each channel includes a continuous time linear equalizer (CTLE) and a linear output driver, which together compensate for a lossy transmission channel between the source transmitter and the final receiver. The linearity of the data path is designed to preserve transmit equalization while keeping the equalization of the DisplayPort and HDMI receiver effective.

The TDP20MB421 is configurable in two ways. In Pin Mode, the device control configuration is done solely by strap pins. Pin mode is designed for many system implementation needs. SMBus/I2C Secondary Mode provides greater flexibility. SMBus/I2C Secondary Mode requires an external SMBus/I2C primary device to configure the TDP20MB421 though writing to its secondary address.