TIDUFG8 December   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Terminology
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Industrial Protocol Fragmentation
      2. 2.2.2 Real-Time Performance and Determinism
      3. 2.2.3 Component Cost and PCB Space Constraints
      4. 2.2.4 Protocol Certification and Software Maintenance
    3. 2.3 Highlighted Products
      1. 2.3.1 AM2612 Microcontroller
      2. 2.3.2 DP83826A Ethernet PHY
      3. 2.3.3 TPS65214 Power Management IC
      4. 2.3.4 LMK3C0105 Clock Generator
  9. 3System Design Theory
    1. 3.1 Key Requirements and Design Considerations
      1. 3.1.1 Operating Modes
    2. 3.2 Software Architecture and Boot Flow
    3. 3.3 Industrial Communication Subsystem (ICSS)
    4. 3.4 Clocking and Synchronization
    5. 3.5 Power Supply
      1. 3.5.1 Multiprotocol Industrial Ethernet Subsystem Power Supply
      2. 3.5.2 System Power Supply
    6. 3.6 Real-Time Ethernet Media Independent Interface (MII)
      1. 3.6.1 SYNC/LATCH Pins for Real-Time Tasks
      2. 3.6.2 Layout Considerations
        1. 3.6.2.1 Layout Guidelines
      3. 3.6.3 EMI and EMC Considerations
      4. 3.6.4 AM2612 Bootstrap Interface
      5. 3.6.5 RJ45 Ethernet Interface
      6. 3.6.6 Industrial User Interface
      7. 3.6.7 Programming and Debugging Options
      8. 3.6.8 USB 2.0 Interface
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5.     Trademarks
  11. 5About the Author

2.3.2 DP83826A Ethernet PHY

The DP83826A is a low-latency, low-power, 10/100-Mbps industrial Ethernet PHY optimized for real-time and deterministic communication in industrial systems. The device supports both 10BASE-Te and 100BASE-TX standards and includes hardware bootstraps for fast link-up and rapid link-drop detection (< 10µs).

The device is designed for robust EMC and EMI performance, enabling compact and reliable network implementations.

Key Features:

  • Enhanced EMC performance with integrated filtering circuitry
  • IEC 61000-4-2 ESD: ±8V contact, ±15kV air (Criteria A)
  • IEC 61000-4-4 EFT: ±4kV at 5kHz, 100kHz (Criteria A)
  • CISPR 22 conducted and radiated emissions Class B
  • Fast link-drop detection < 10µs
  • Cable reach > 150m
  • Integrated voltage-mode line driver integrated terminations on MAC interface

These features make the DP83826A an excellent choice for compact, cost-optimized, and EMC-compliant industrial Ethernet modules.