W5500

Overview

The W5500 is a hardwired TCP/IP embedded Ethernet controller integrating a 10/100 Ethernet MAC, PHY, and TCP/IP protocol stack. It supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE protocols with eight independent hardware sockets. The device features an SPI interface supporting up to 80 MHz operation in Mode 0 or 3. Internal memory includes a 32 Kbyte buffer for packet processing. Electrical specifications define a 3.3 V operating voltage with 5 V I/O tolerance, a maximum supply current of 132 mA, and an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Integrates a full hardware TCP/IP protocol stack including MAC and PHY layers
• Provides eight simultaneous independent hardware socket connections
• Supports high-speed SPI communication with Variable Length Data Mode
• Includes internal 32 Kbyte memory buffer for Ethernet packet handling

Applications

• Home network devices such as set-top boxes and digital media adapters
• Serial-to-Ethernet conversion for access controls and LED displays
• Security systems including DVRs and network cameras
• Factory and building automation control systems

Procurement Notes

Verify the specific package variant against the 48-pin LQFP specification. Confirm that the external reference resistor value matches the required 12.4 kΩ tolerance. Ensure the crystal frequency aligns with the 25 MHz requirement for proper clock generation.

Selection Notes

Select this component when a single-chip solution for embedded internet connectivity is required. It is suitable for applications needing multiple simultaneous network connections without heavy CPU overhead. Verify that the host MCU supports the necessary SPI modes and voltage levels for direct integration.

Part Context

WIZnet developed the W5500 to simplify embedded networking by offloading protocol processing. It replaces traditional software-based stacks with dedicated hardware logic. This approach reduces system complexity and improves processing speed for IoT and industrial controllers requiring reliable Ethernet connectivity.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.