TIDUF94 October   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 DP83TC818S-Q1 (Automotive SPE PHY)
      2. 2.3.2 TPS7B8233-Q1 (3.3V Vsleep Ultra-Low-IQ Low-Dropout Regulator)
      3. 2.3.3 TPS74701-Q1 (1.0V Rail Low-Dropout Regulator)
      4. 2.3.4 CDC6CE025000-Q1 (BAW Oscillator)
      5. 2.3.5 TPS4H160-Q1 (High-Side Switch)
  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
      1. 3.2.1 High-Side Switch
  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

1.1 Key System Specifications

The key features of the TIDA-020071 design include the following:

  • 100Base-T1 and 1000Base-T1 automotive Ethernet
  • 12V can be coupled on the automotive Ethernet cable
  • DP83TC818S-Q1 1.0V supplied by the internal LDO of the PHY
  • Option to provide the same clock from TI's BAW oscillator through a clock buffer to all four Ethernet PHYs
  • Option to populate TI's BAW oscillator
  • Board ID EEPROM for identification
TIDA-020071 TIDA-020071 Board Figure 1-1 TIDA-020071 Board