WIZnet W5500 Hardwired TCP/IP Ethernet Controller LQFP48
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Prices updated: 13 Oct 2026
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About this product
The W5500 is a single-chip hardwired TCP/IP Ethernet controller with a built-in 10/100 Ethernet MAC and PHY. It connects to a microcontroller over SPI and handles TCP, UDP, IPv4, ICMP, ARP, IGMP and PPPoE in hardware, so embedded projects can add network connectivity using simple socket code.
Specifications
- Host interface
- SPI
- Ethernet speed
- 10/100 Mbps
- Internal data buffer
- 32 KB
- Supported protocols
- TCP, UDP, IPv4, ICMP, ARP, IGMP, PPPoE
- Package
- LQFP48
- Supply voltage
- 3.3 V
Frequently asked questions
What external parts are needed for a working Ethernet port?
The W5500 needs an external 25 MHz crystal, and an RJ45 jack with integrated magnetics or a separate magnetics transformer on the line side, as shown in its datasheet.
How is it connected to a microcontroller?
Through SPI (MOSI, MISO, SCLK and chip select), plus reset and interrupt pins as described in the datasheet. Match the logic levels of your microcontroller and use level shifting if needed.
