SNLA434 November   2023 DP83TC812R-Q1 , DP83TD510E , DP83TG720R-Q1 , LMK1C1103 , LMK1C1104 , LMK5B12204 , LMK6C

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Power Supply
    1. 2.1 Internal Supply Rails
    2. 2.2 External Supply Lines
    3. 2.3 Requirements for PoDL
    4. 2.4 Clocking
      1. 2.4.1 Topology 1
      2. 2.4.2 Topology 2
  6. 3Summary
  7. 4References

1 Introduction

Whenever designing a system, certain rules can be applied to create a system not emitting electromagnetic interference, but also to be robust against external emissions. This document summarizes good practices that can be kept in mind during schematic as well as layout design. The main focus point here is on single pair Ethernet, but some rules are also valid for standard Ethernet as well.