SNLA340 October   2022 DP83TC811R-Q1 , DP83TC811S-Q1 , DP83TC812R-Q1 , DP83TC812S-Q1 , DP83TC814R-Q1 , DP83TC814S-Q1 , DP83TG720R-Q1 , DP83TG720S-Q1

 

  1.   DP83TC811, DP83TC812, DP83TC814, DP83TG720 Hardware Rollover Document
  2.   Trademarks
  3. 1Introduction
  4. 2Device Comparison
    1. 2.1 Pin Map Comparison
      1. 2.1.1 DP83TC811S
      2. 2.1.2 DP83TC811R
      3. 2.1.3 DP83TC812S
      4. 2.1.4 DP83TC812R
      5. 2.1.5 DP83TC814S
      6. 2.1.6 DP83TC814R
      7. 2.1.7 DP83TG720S
      8. 2.1.8 DP83TG720R
    2. 2.2 Feature Comparison
    3. 2.3 Pin Comparison Table
      1. 2.3.1 Strap Comparison
        1. 2.3.1.1 PHY Address Straps
        2. 2.3.1.2 MAC Interface, Master/Slave, Autonomous Strap
    4. 2.4 Power Supply Comparison
    5. 2.5 Design Parameters
    6. 2.6 MDI Comparison
    7. 2.7 CMC Comparison
    8. 2.8 SGMII Reference Schematics
    9. 2.9 RGMII Reference Schematics
  5. 3Summary

1 Introduction

Texas Instruments Automotive Ethernet PHY portfolio consists of 100BASE-T1 (DP83TC811, DP83TC812, DP83TC814) and 1000BASE-T1 (DP83TG720) devices.

Automotive system qualification cycles are time-consuming and any notable change can lead to significant increases in development costs. Therefore, to reduce the complexity of automotive Ethernet system design, Texas Instruments designed their Ethernet PHYs to be implemented on a single system. This avoids a complete system redesign when changing devices, based on the application requirement.

To achieve this, all four devices (DP83TC811, DP83TC812, DP83TC814, and DP83TC720) have the same package:

  • 36-QFN, 6mm x 6mm (wettable flanks)

Furthermore, MAC interface selection can also affect PCB design:

  • DP83TC811, DP83TC812, DP83TC814 support MII, RMII, RGMII, and SGMII MAC interfaces.

    • This application report assumes that DP83TC811/812/814 will be operated in RGMII or SGMII mode.

  • DP83TG720 supports RGMII and SGMII MAC interfaces.

    • MII and RMII standards were defined only for 10 and 100Mbps only, so DP83TG720 does not support these options.