ZHCSUX9 February   2024 TMUXHS4446

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  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 Electrical Characteristics
    6. 5.6 High-Speed Performance Parameters
    7. 5.7 Switching Characteristics
    8. 5.8 I2C Timing Characteristics
    9. 5.9 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 High-Speed Differential Signal Switching
      2. 6.3.2 Low-Speed SBU Signal Switching
      3. 6.3.3 GPIO and I2C Control Modes
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application: USB-C with DP Alternate Mode - Source
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 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 Device Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 接收文档更新通知
    4. 8.4 支持资源
    5. 8.5 Trademarks
    6. 8.6 静电放电警告
    7. 8.7 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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7.2.2 Detailed Design Procedure

During implementation of a USB Type-C with DP alternate mode, the AC coupling capacitors must be placed carefully. Figure 7-3 depicts the AC coupling capacitor placement for typical applications. Note TMUXHS4446 supports a Vcm range, not exceeding the typical range of 0 – 1.8V. Note the AC caps are used only on TX pins on both source and sink ends. However, if there is an application where such Vcm range is not assured, TI recommends to make changes on AC coupling capacitor placements. Figure 7-4 illustrates such implementation. Additional optional AC coupling capacitors are used for RX pins. In detailed source schematic shown in Figure 7-2 such capacitors are marked as CRX and TI recommends them to be 0.5μF.

GUID-20240219-SS0I-FXST-PK9N-KFKMC5HCZ7KH-low.svg Figure 7-3 Typical Placement of AC Coupling Capacitors with Vcm ≤ 1.8V
GUID-20240219-SS0I-NGTF-NWTW-LVX7GX0V01TK-low.svg Figure 7-4 Placement of AC coupling Capacitors with Vcm > 1.8V