Hardwired TCP/IP Ethernet ICs & PoE Modules
WIZnet is a renowned Korean semiconductor company known worldwide for its patented "hardwired TCP/IP stack" technology. The flagship W5500 is widely adopted in Arduino, Raspberry Pi, and industrial embedded communities. Product lines include Ethernet controller ICs, network modules, and PoE powered device modules for Industrial IoT, IP cameras, factory automation, and smart home applications.
Official Website| Part Number | Description | Package |
|---|---|---|
| W55RP20 | W55RP20 RP2040 + W5500 Ethernet SiP | QFN68, 1.8~3.3 V |
| W6300 | W6300 IPv4/IPv6 Hardwired TCP/IP Ethernet Controller | 48-LQFP / QFN, 3.3 V |
| WIZ550io | WIZ550io Auto-Configurable W5500 Ethernet Module | — |
| WIZ750SR | WIZ750SR Serial-to-Ethernet Gateway Module | — |
| W7500P | W7500P Ethernet iMCU (Cortex-M0 + Integrated PHY) | 64-LQFP (7×7) |
| W5100 | W5100 Hardwired TCP/IP Ethernet Controller (Classic) | 80-pin LQFP |
| W5300 | W5300 Hardwired TCP/IP Ethernet Controller (Parallel) | 100-LQFP (14×14) |
| W5200 | W5200 Hardwired TCP/IP Ethernet Controller (SPI) | 48-pin QFN, 3.3 V |
| W5500 | W5500 Hardwired TCP/IP Ethernet Controller | LQFP48 |
| W5100S | W5100S Hardwired TCP/IP Ethernet Controller (Multi-Interface) | LQFP80 |
| WIZPoE-P1 | WIZPoE-P1 PoE Powered Device Module (8W) | Module (PCB) |
| W6100 | W6100 IPv4/IPv6 Dual-Stack Hardwired TCP/IP Controller | LQFP48, QFN48 |
| W7500 | W7500 iMCU (Cortex-M0 + Hardwired TCP/IP) | TQFP64 |
| WizFi360 | WizFi360 Industrial-Grade Wi-Fi Module | Wi-Fi Module |
The W55RP20 is a WIZnet SiP integrating a Raspberry Pi RP2040 (dual Cortex-M0+) with the W5500 hardwired TCP/IP Ethernet controller in a single QFN68 package. With 2MB flash, 264KB SRAM, a hardwired TCP/IPv4 stack (8 sockets, 32KB/32KB TX/RX buffer), and an embedded 10/100 PHY, it builds compact industrial-Ethernet nodes with no external Ethernet chip. Programmable in C/C++ or MicroPython, with SWD debug.
The W6300 is WIZnet's first Ethernet controller with a dual IPv4/IPv6 hardwired TCP/IP stack, using a high-speed QSPI (single/dual/quad) host interface, a system clock up to 150MHz, and throughput up to ~90Mbps. With an embedded 10/100 PHY (auto-negotiation, Auto-MDIX), 8 hardware sockets, a 64KB buffer, and ICMPv6/WOL support, in 48-LQFP/QFN at 3.3V with 5V-tolerant I/O, it suits IPv6-ready industrial and IoT devices.
The WIZ550io is a WIZnet auto-configurable Ethernet module based on the W5500, with a pre-programmed unique MAC address, integrated PHY, transformer, and RJ45 (MAGJACK), and self-initialization on power-up (default IP 192.168.1.2). It connects to a host over SPI (up to 80MHz), with 8 hardware sockets and a 32KB buffer — plug-and-play wired networking for any MCU.
The WIZ750SR is a WIZnet serial-to-Ethernet (S2E) gateway module built on the W7500P Ethernet MCU (Arm Cortex-M0 + hardwired TCP/IP), converting RS-232/TTL/RS-422-485 serial to TCP/IP. 10/100M Ethernet, serial up to 230kbps, with TCP server/client and UDP modes, configurable via AT commands / web / config tool — and software/hardware compatible with the WIZ107SR/108SR.
The W7500P is a WIZnet Ethernet iMCU integrating an Arm Cortex-M0 (up to 48MHz), 128KB Flash, 16KB SRAM, hardwired TCP/IP (8 sockets, 32KB socket buffer), and an embedded 10/100 PHY (IP101G). It is the integrated-PHY version of the W7500 (which needs an external PHY) — a single-chip networked design, ideal for IoT and serial-to-Ethernet. 64-LQFP.
The W5100 is WIZnet's classic hardwired TCP/IP Ethernet controller (used on the Arduino Ethernet Shield), integrating 10/100 MAC+PHY, 4 hardware sockets, and a 16KB buffer, with a parallel-bus and SPI host interface in an 80-pin LQFP, 3.3V with 5V-tolerant I/O. The newer W5100S is register/software-compatible with faster SPI in a smaller package.
The W5300 is a WIZnet hardwired TCP/IP Ethernet controller with 8 independent hardware sockets, a 128KB TX/RX buffer, an 8/16-bit parallel host interface, and an embedded 10/100 PHY, supporting TCP/UDP/ICMP/IPv4/ARP/IGMP/PPPoE. Its high-throughput parallel architecture suits industrial networking, serial-to-Ethernet, and data acquisition. 100-LQFP package.
The W5200 is a WIZnet hardwired TCP/IP Ethernet controller with an SPI (up to 80MHz) host interface, 8 hardware sockets, a 32KB TX/RX buffer, and an integrated 10/100 MAC and PHY (Auto-MDI/MDIX). It runs at 3.3V with 5V-tolerant I/O in a 48-pin QFN. Note: WIZnet marks the W5200 not-recommended-for-new-design (EOL/NRND) and it is not covered by the current ioLibrary — for new designs use its successor W5500; this page remains for existing-design lookup and replacement evaluation.
W5500 is WIZnet's flagship Ethernet controller with a unique hardwired TCP/IP stack, enabling direct network connectivity without software TCP/IP implementation. Connects to the host MCU via SPI, features 32KB TX/RX buffer, supports up to 8 sockets — the most widely adopted Ethernet chip in the Arduino/Raspberry Pi ecosystem.
W5100S is an enhanced version of W5100, supporting both SPI and parallel interfaces with 16KB TX/RX buffer and 4 sockets. Adds SOCKET-less commands, Wake on LAN (WOL), and PHY power-down mode compared to W5100 — ideal for embedded systems requiring a parallel bus interface.
WIZPoE-P1 is a WIZnet IEEE 802.3af/at standard PoE Powered Device (PD) module that draws power directly from the Ethernet cable, outputting 5V at up to 8W — no separate power cable needed. Suitable for IP cameras, industrial sensors, APs, access control devices, and other PoE-powered applications.
The W6100 is an advanced successor to the W5500, distinguished by supporting both IPv4 and IPv6 dual stacks entirely in hardware. It integrates a 10/100 MAC and PHY with 8 hardware sockets and is pin-compatible with the W5100S — an ideal choice when devices must migrate to IPv6.
The W7500 is a WIZnet "iMCU" single-chip solution that integrates an Arm Cortex-M0 microcontroller with the hardwired TCP/IP core on one die. With 128KB Flash, rich peripherals, and 8 hardware sockets, designs that need "MCU + Ethernet" can be done with a single chip.
The WizFi360 is a cost-effective industrial-grade Wi-Fi module from WIZnet, compliant with IEEE 802.11 b/g/n and supporting Station, SoftAP, and combined modes. Add Wi-Fi to any MCU over UART with AT commands; it has a built-in TCP/IP stack and an industrial -40~85°C operating range.
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