SLASEW5 December   2020 TMUXHS4412

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 Electrical Characteristics
    6. 6.6 High-Speed Performance Parameters
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Enable and Power Savings
      2. 7.3.2 Data Line Biasing
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 PCIe Lane Muxing
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Pin-to-pin Passive versus Redriver Option
        4. 8.2.1.4 Application Curves
    3. 8.3 Systems Examples
      1. 8.3.1 PCIe Muxing for Hybrid SSD
      2. 8.3.2 DisplayPort Main Link
      3. 8.3.3 USB 4.0 / TBT 3.0 Demuxing
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.1.2 Detailed Design Procedure

The TMUXHS4412 is a high-speed passive switch device that can behave as a mux or demux. Because this is a passive switch, signal integrity is important because the device provides no signal conditioning capability. To implement PCIe lane swithing topology, the designer needs to understand the following.

  • Determine the loss profile between circuits that are to be muxed or demuxed.
  • Provide clean impedance and electrical length matched board traces.
  • Provide a control signal for the SEL and PD pins.
  • The thermal pad must be connected to ground.
  • See the application schematics on recommended decouple capacitors from VCC pins to ground.