TIDUF83 September   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 DP83TC817S-Q1 (Automotive SPE PHY)
      2. 2.3.2 TPS629210-Q1 (3.3V Rail Buck Converter)
      3. 2.3.3 TPS7B8233-Q1 (3.3V VSLEEP Ultra-Low-IQ Low-Dropout Regulator)
      4. 2.3.4 TPS74701-Q1 (1.0V Rail Low-Dropout Regulator)
      5. 2.3.5 CDC6CE025000-Q1 (BAW Oscillator)
  9. 3System Design Theory
    1. 3.1 Ethernet PHY
      1. 3.1.1 Ethernet PHY Power Supply
      2. 3.1.2 Ethernet PHY Clock Source
    2. 3.2 Power Coupling Network
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

3.1 Ethernet PHY

This board supports a broad range of TI's automotive SPE PHYs. The board supports both 100Base-T1 and 1000Base-T1. By default the board uses 100Base-T1 with DP83TC817S-Q1. To use this board with 1000Base-T1, the PHY can be replaced with the DP83TG720S-Q1 SPE PHY. When replacing the DP83TC817S-Q1 with the DP83TG720S-Q1, populate L3, C2, C5, C6, C15 and C16. Additionally, see the design requirements and power supply recommendations of the DP83TG720S-Q1 data sheet.