WIZnet Ethernet Controllers and Semiconductor Chips

Engineering selection and technical assessment for WIZnet hardwired TCP/IP Ethernet controllers, embedded network microcontrollers, and communication modules.

Hardwired TCP/IP Ethernet controllers W5500 and W5100S

WIZnet integrated circuits of W5500 and W5100S series execute hardwired network protocol processing without host CPU overhead. The chips embed 10/100 Ethernet MAC and PHY layers, high-speed SPI interfaces, and support up to eight independent simultaneous sockets.

Hardwired TCP/IP stack eliminates network processing overhead from host MCU
SPI bus supports clock rates up to 80 MHz for fast packet data transmission
Internal 32 kilobyte memory buffer provides deterministic packet processing
Compact LQFP packaging engineered for industrial circuit board applications

Dual stack IPv4 and IPv6 Ethernet controllers W6100

WIZnet W6100 Ethernet controllers provide concurrent IPv4 and IPv6 network stack support at silicon hardware level. The devices suit industrial IoT infrastructure, distributed telemetry acquisition, and reliable communication gateway platforms across factories.

Native dual stack IPv4 and IPv6 hardware processing engine for automation
Eight independent sockets configurable for TCP, UDP, and raw protocol modes
Direct interface compatibility with high-speed SPI and parallel bus lines
Integrated physical layer Ethernet transceiver with auto-negotiation link

Embedded Ethernet microcontrollers iMCU series W7500

Single-chip microcontrollers WIZnet W7500 and W7500P integrate a 32-bit ARM Cortex-M0 processor core, non-volatile program flash, and hardwired TCP/IP hardware core. These processors power compact industrial sensors, monitoring instruments, and remote controllers.

Low-power 32-bit ARM Cortex-M0 processor core for embedded device control
On-chip 128 kilobyte flash memory storing firmware and operational logic
Integrated 10/100 Ethernet physical transceiver in W7500P package variant
Rich digital peripheral complement including UART, SPI, I2C, and ADC lines

Serial to Ethernet interface converter modules WIZ750SR

WIZnet ready-to-use communication modules WIZ750SR and WIZ550SR interface industrial equipment equipped with RS-232, RS-485, and TTL serial ports straight into Ethernet networks. Modules require no modification to legacy machinery firmware or operating logic.

Transparent hardware translation bridging serial streams into TCP/IP frames
Operational modes supporting TCP server, TCP client, and UDP communication
Web-based configuration management interface and standard terminal command set
Compact module footprint designed for straightforward mainboard integration

Embedded Ethernet interface modules with RJ-45 series WIZ550io

Mezzanine interface modules WIZnet WIZ550io and WIZ850io combine the hardwired Ethernet controller, precision clock circuitry, and a Mag-Jack connector with built-in isolation transformer. Modules streamline circuit routing and protect sensitive host microcontroller pins.

Integrated Mag-Jack connector providing galvanic line voltage isolation
Factory configured hardware MAC address enabling immediate network startup
Minimal passive external components required for host system connection
Standard pin header layout ensuring secure board mount electrical contact

Industrial wireless Wi-Fi communication modules WizFi360

Industrial radio modules WIZnet WizFi360 provide wireless networking compliant with 2.4 GHz 802.11 b/g/n standards. Operated through standard serial AT commands via UART, these modules integrate mobile automation nodes, telemetry sensors, and peripheral industrial devices.

Wireless 2.4 GHz 802.11 b/g/n communication for industrial data exchange
Simplified operational control using standardized serial UART AT commands
Flexible operating modes covering SoftAP access point and network station
On-board printed antenna or external antenna connector options available

Hardwired TCP/IP protocol architecture and host CPU offloading

The Hardwired TCP/IP protocol stack engineered by WIZnet implements transport and network layers directly into silicon logic.

Unlike software stacks executed by a host microcontroller operating system, the WIZnet hardware offload engine processes packet headers, checksum verification, and dynamic sliding windows without CPU intervention.

This hardware separation eliminates kernel buffer overflows, stabilizes execution timing during broadcast traffic spikes, and provides deterministic response speeds required by industrial automation networks.

High-speed SPI bus implementation and packet data pipelining

Connecting W5500 and W5100S Ethernet controllers to external microcontrollers relies on a four-wire SPI bus supporting clock frequencies up to 80 MHz.

To maximize transmission efficiency, WIZnet controller chips implement continuous packet streaming modes with automatic internal address pointer increments.

Independent read and write register pointers for each socket maintain circular memory buffers within the chip, avoiding extra bus arbitration overhead between controller and host processor during sustained data acquisition.

Hardware socket allocation and deterministic network processing

Internal static memory of 32 kilobytes inside WIZnet Ethernet controllers is allocated dynamically across independent hardware sockets. Each socket operates autonomously to sustain parallel sessions across TCP, UDP, IPRAW, or MACRAW communication formats.

This architecture allows simultaneous communication with plant-level SCADA platforms, periodic UDP telemetry streaming, and remote terminal connections without mutual resource locking or network packet drops.

Dual stack IPv4 and IPv6 network integration in W6100 chips

Industrial automation transitions toward IPv6 addressing require native protocol support without adding hardware complexity to field devices.

The W6100 network controller incorporates dedicated hardware logic for IPv6 header parsing, automatic link-local address generation, and Neighbor Discovery Protocol NDP handling.

Dual stack hardware routing inside the silicon allows machines to operate in hybrid networks without external address translation gateways.

Serial to Ethernet interface conversion using WIZ750SR modules

WIZ750SR communication modules deliver transparent hardware bridging between industrial RS-232, RS-485, or UART lines and local Ethernet networks.

Driven by the W7500P processor based on an ARM Cortex-M0 core, the module captures byte streams from automation controllers and packages them into TCP/IP frames instantly.

Operating modes including TCP server, TCP client, and UDP streaming are configured through standard serial AT commands or web interfaces.

Industrial noise isolation using Mag-Jack integrated connectors

Designing durable network communication interfaces requires electromagnetic immunity and transient surge protection.

The WIZ550io interface module integrates an RJ-45 Mag-Jack receptacle with internal isolation transformers rated for 1.5 kV, common-mode choke filters, and voltage suppression elements.

This layout prevents ground loop currents across shielding lines, attenuates high-frequency inverter noise, and shields semiconductor pins from electrostatic discharge.

WIZnet and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of WIZnet and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.