WIZ810MJ

Overview

The WIZ810MJ is a compact Ethernet module integrating the W5100 hardware TCP/IP chip with an embedded PHY and a MAG-JACK (RJ45 connector with integrated transformer). Designed for rapid development of Internet-enabled systems, it eliminates the need for complex PCB layout regarding the transformer and RJ45 interface. The module supports 10/100 Base-TX speeds, half/full duplex modes, and automatic negotiation. It operates on a 3.3V supply with 5V tolerant I/Os and features a 2x10 pin header with 2.54mm spacing for direct connection to microcontrollers via SPI or parallel bus interfaces.

Feature Summary

• Integrates W5100 TCP/IP controller and MAG-JACK into a single component
• Supports simultaneous four independent socket connections
• Includes built-in hardware protocol stacks for TCP, UDP, IPv4, ICMP, ARP, and PPPoE
• Features 5V tolerant I/O levels compatible with various logic families

Applications

• Embedded IoT sensor nodes requiring network connectivity
• Industrial control systems needing reliable Ethernet communication
• Smart home devices and automation controllers
• Rapid prototyping of networked microcontroller applications

Procurement Notes

Verify the specific suffix codes against the manufacturer's current datasheet to confirm pinout compatibility and package variations. Ensure that the selected variant matches the required operating temperature range and voltage specifications for the target application environment before finalizing procurement.

Selection Notes

Select this module when hardware TCP/IP offloading is required to reduce MCU processing load. It is suitable for designs needing standard Ethernet connectivity without external PHY or transformer components. Consider the available GPIO pins for SPI or parallel bus selection and ensure the host system supports the required voltage levels for reliable data transmission.

Part Context

The WIZ810MJ belongs to the WIZnet MJ series of network modules, which combine iEthernet chips with MAG-JACKs. This series is designed to simplify Ethernet integration by providing a pre-certified, compact solution that replaces discrete PHY and transformer components, allowing developers to focus on application logic rather than physical layer circuit design.

Replacement Considerations

The WIZ810S-io is a surface-mount alternative offering similar functionality with a different form factor. For legacy through-hole designs requiring identical pinouts, verify compatibility with other W5100-based modules from the same family, ensuring mechanical and electrical parameters align with the existing board layout.