ZHCSQZ0A August   2022  – November 2022 TMUXHS221

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and 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 – S-Parameters
    9. 6.9  Typical Characteristics – Eye Diagrams
    10.     16
    11. 6.10 Typical Characteristics – RON
  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 Routing Debug Signals to USB Port
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
    3. 8.3 Systems Examples
      1. 8.3.1 PCIe Clock Muxing
      2. 8.3.2 USB-C SBU Muxing
      3. 8.3.3 Switching USB Port
  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 Related Documentation
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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8.2.1.2 Detailed Design Procedure

The TMUXHS221 is a high-speed passive switch device that can behave as a mux or demux. Signal integrity is important because as a passive switch, the device provides no signal conditioning capability. The TMUXHS221 has an excellent electrical performance with very low channel ON resistance, high bandwidth, low reflection, and low added jitter for both debug signals and USB 2.0 signals.

  • 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 OEn pins.
  • Provide good ground connection to the board ground plane.
  • See the application schematics for the recommended decouple capacitors from VCC pins to ground.