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.
| Ethernet Chip | W5500 |
| Host Interface | SPI (up to 80 MHz) |
| MAC Address | Pre-programmed unique |
| Sockets | 8 hardware sockets |
| Buffer | 32 KB (W5500) |
| Supply | 3.3 V |
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Hardwired TCP/IP Ethernet ICs & PoE Modules
View all WIZnet products → Official WIZnet siteThe 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 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.
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