SLASEW5 December   2020 TMUXHS4412


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin 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 Electrical Characteristics
    6. 6.6 High-Speed Performance Parameters
    7. 6.7 Switching Characteristics
    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 Output Enable and Power Savings
      2. 7.3.2 Data Line Biasing
    4. 7.4 Device Functional Modes
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 PCIe Lane Muxing
        1. Design Requirements
        2. Detailed Design Procedure
        3. Pin-to-pin Passive versus Redriver Option
        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. 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


The TMUXHS4412 is a analog passive mux/demux that can work for any high-speed interface as long as its signaling is differential, has a common mode voltage (CMV) that is within valid range (0 to 1.8 V for 3.3 V supply voltage mode), and has amplitude up to 1800 mVpp-differential. It employs adaptive input voltage tracking that ensures the channel remains unchanged for the entire common mode voltage range. Two channels of the device can be used for electrical signals that have different CMV between them. Two channels can also be used such a way that the device switches two different interface signals with different data and electrical characteristics.

Excellent dynamic characteristics of the device allow high speed switching with minimum attenuation to the signal eye diagram with very little added jitter. While the device is recommended for the interfaces up to 20 Gbps, actual data rate where the device can be used highly depends on the electrical channels. For low loss channels where adequate margin is maintained the device can potentially be used for higher data rates.

The TMUXHS4412 is only recommended for differential signaling. If the two signals on differential lines are completely un-correlated, then internal circuits can create certain artifacts. It is recommended to analyze the data line biasing of the device for such single ended use cases. The device parameters are characterized for differential signaling only.