SNLA370A December   2020  – December 2020 DP83TG720R-Q1 , DP83TG720S-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Device Comparison
    1. 2.1 Feature Comparison
    2. 2.2 Pin Map Comparison
    3. 2.3 Strap Comparison
      1. 2.3.1 PHY Address Straps
      2. 2.3.2 MAC Interface, Master/Slave, Autonomous Strap
    4. 2.4 Power-Supply Comparison
    5. 2.5 MDI Comparison
  4. 3Reference Schematics
  5. 4Summary
  6. 5Revision History

4 Summary

This application note discusses the differences between the two Ethernet PHYs and details how these differences can be accommodated on a single design. With proper component selection and place-holders, same PCB can be re-used for DP83TC811 and DP83TG720. Layout constraints of gigabyte PHY are recommended to be followed (for example RGMII constraints for gigabyte speed) to have the board's parasitics/delays suitable for both DP83TG720 and DP83TC811.