W5500 Ethernet Network Module - SPI Hardwired TCP/IP Controller

The W5500 Ethernet network module is built around the WIZnet W5500 hardwired TCP/IP embedded controller, a single-chip solution that integrates a 10/100 Ethernet MAC and PHY, a 32KB internal buffer, and eight independent hardware sockets. Unlike software-based Ethernet stacks that consume host Flash and RAM, this W5500 Ethernet module offloads TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE processing into dedicated hardware logic, freeing the host microcontroller for application tasks. Communication with the host MCU uses a high-speed SPI interface supporting up to 80MHz and SPI modes 0 and 3, while the module itself operates at 3.3V with 5V-tolerant I/O, and an onboard regulator allows powering from either a 3.3V or 5V supply. The RJ45 MagJack includes an integrated isolation transformer and status LEDs for link, speed, duplex, and activity. With support for DHCP, DNS, Wake-on-LAN, and a low-power sleep mode, this SPI Ethernet module is suited to IoT endpoints, home automation gateways, industrial controllers, and any embedded design that needs a reliable wired network connection with minimal processor overhead.

Ethernet Network Module Application

1. IoT devices including smart home gateways, sensor nodes, and remote monitoring terminals.
2. Industrial equipment such as POS terminals, mini printers, access controllers, and serial-to-Ethernet converters.
3. Simple web servers, network printers, DVRs, IP cameras, and kiosks requiring multiple simultaneous connections.
4. Arduino, STM32, ESP32, and Raspberry Pi Pico projects that need a wired Ethernet interface.
5. Prototyping and small-scale production where a hardwired TCP/IP offload module reduces firmware complexity.

Ethernet Network Module Specifications

1. Controller IC: WIZnet W5500 (hardwired TCP/IP embedded Ethernet controller)
2. Supported protocols: TCP, UDP, IPv4, ICMP, ARP, IGMP, PPPoE
3. Simultaneous sockets: 8 independent hardware sockets
4. Internal buffer memory: 32KB TX/RX
5. Host interface: SPI (Serial Peripheral Interface), modes 0 and 3
6. Maximum SPI clock: 80MHz
7. Ethernet PHY: 10BaseT / 100BaseTX, auto-negotiation (full/half duplex)
8. Network connector: RJ45 MagJack with integrated isolation transformer and status LEDs
9. Operating voltage (logic): 3.3V DC
10. Module input voltage: 3.3V or 5V DC (5V via onboard regulator)
11. I/O signal tolerance: 5V tolerant
12. Power consumption: ~132mA (active 100Mbps link); ~13mA (power-down mode)
13. Operating temperature: -40°C to +85°C
14. Dimensions: 55mm × 28mm (module PCB)
15. Power management: Power-down mode and Wake-on-LAN over UDP
16. Additional features: DHCP, DNS, SSL/TLS support, low-power sleep mode