SNLS685 December   2020 DS160PR412


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 DC Electrical Characteristics
    6. 6.6 High Speed Electrical Characteristics
    7. 6.7 SMBUS/I2C Timing Charateristics
    8. 6.8 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Linear Equalization
      2. 7.3.2 Flat Gain
      3. 7.3.3 Receiver Detect State Machine
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active PCIe Mode
      2. 7.4.2 Active Buffer Mode
      3. 7.4.3 Standby Mode
    5. 7.5 Programming
      1. 7.5.1 Control and Configuration Interface
        1. Pin Mode
          1. Four-Level Control Inputs
        2. SMBUS/I2C Register Control Interface
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 PCIe x8 Lane Switching
        1. Design Requirements
        2. Detailed Design Procedure
        3. Pin-to-pin Passive versus Redriver Option
        4. Application Curves
      2. 8.2.2 DisplayPort Application
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
  11. 11Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information



DisplayPort Application

The DS160PR412 can be used as a four channel DisplayPort (DP) redriver demux for data rates up to 20 Gbps. To use the device in a non-PCIe application, the RX_DET pin must be pin-strapped to GND with 1 kΩ resistor (L0).

The inverted DisplayPort HPD signal can be used to put the device into standby mode by using its PD pin. Note in a DisplayPort link a sink can use HPD line to create an interrupt for its link partner source. If HPD signal is used for power management an RC filter must be installed to filter out HPD interrupt signals.

The device is a linear redriver which is agnostic to DP link training. The DP link training negotiation between a display source and sink stays effective through the device . The redriver becomes part of the electrical channel along with passive traces, cables, and so forth, resulting into optimum source and sink parameters for best electrical link.

Figure 8-4 shows a simplified schematic for DisplayPort demultiplexing application using DS160PR412. Auxiliary and Hot plug detect (HPD) are demuxed outside of DS160PR412. If system use case requires implementing DP power states, the device must be controlled by the I2C or the pin-strap pins.

GUID-B120531A-AE55-4F91-8223-E6D47710DF7D-low.gif Figure 8-4 Simplified Schematic for DisplayPort Demultiplexer Application