{"product_id":"lan8720-ethernet-transceiver-module-rmii-interface-arduino-diy","title":"LAN8720 Ethernet Transceiver Module – RMII for Arduino \u0026 STM32","description":"\u003ch2\u003eLAN8720 Ethernet Transceiver Module with RMII Interface\u003c\/h2\u003e\n\u003cp\u003eAdd reliable wired network connectivity to your microcontroller projects with the \u003cstrong\u003eLAN8720 Ethernet Transceiver Module\u003c\/strong\u003e. Built around the industry-standard LAN8720A chip, this compact board features a \u003cstrong\u003eReduced Media Independent Interface (RMII)\u003c\/strong\u003e — making it a perfect fit for Arduino, STM32, ESP32, and other popular development platforms. Whether you're building a home automation hub, an IoT sensor node, or a networked data logger, this module delivers stable, low-power 10\/100 Mbps Ethernet performance.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLAN8720A Chip:\u003c\/strong\u003e Industry-proven Fast Ethernet PHY transceiver supporting 10BASE-T and 100BASE-TX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRMII Interface:\u003c\/strong\u003e Reduced pin-count RMII connection for easy integration with STM32, ESP32, and Arduino-compatible boards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide I\/O Voltage Range:\u003c\/strong\u003e 1.6 V to 3.6 V supply voltage — compatible with 3.3 V logic systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e –40 °C to +85 °C for reliable performance in demanding environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto-Negotiation:\u003c\/strong\u003e Automatically detects and configures link speed and duplex mode\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Energy-efficient design ideal for battery-backed and embedded systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact DIY-Friendly Form Factor:\u003c\/strong\u003e Breadboard-compatible pin layout for rapid prototyping\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 module per package\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLAN8720A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRMII (Reduced Media Independent Interface)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNetwork Standards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10BASE-T \/ 100BASE-TX\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Supply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.6 V – 3.6 V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–40 °C to +85 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIY Kit (1 × Module)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino \u0026amp; STM32 Ethernet projects\u003c\/li\u003e\n  \u003cli\u003eESP32 wired network connectivity\u003c\/li\u003e\n  \u003cli\u003eIoT gateways and sensor nodes\u003c\/li\u003e\n  \u003cli\u003eHome automation controllers\u003c\/li\u003e\n  \u003cli\u003eIndustrial embedded network interfaces\u003c\/li\u003e\n  \u003cli\u003eNetwork-enabled data loggers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the LAN8720 module compatible with STM32 and ESP32 microcontrollers?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The LAN8720 module uses the standard RMII interface, which is directly supported by STM32 (via HAL\/LL Ethernet libraries) and ESP32 (via ESP-IDF). It is also usable with any Arduino-compatible board that supports RMII Ethernet PHY connections, making it extremely versatile for DIY and professional projects alike.\u003c\/p\u003e\n\u003ch4\u003eQ: What voltage levels does the LAN8720 Ethernet module support?\u003c\/h4\u003e\n\u003cp\u003eA: The module operates with an I\/O supply voltage range of 1.6 V to 3.6 V, making it fully compatible with 3.3 V logic systems commonly found on STM32, ESP32, and modern Arduino boards. It is not directly compatible with 5 V logic without a level shifter.\u003c\/p\u003e\n\u003ch4\u003eQ: What network speeds does the LAN8720 transceiver support?\u003c\/h4\u003e\n\u003cp\u003eA: The LAN8720A chip supports both 10BASE-T (10 Mbps) and 100BASE-TX (100 Mbps) Ethernet standards with auto-negotiation, so it will automatically select the best available speed when connected to a router or switch — no manual configuration required for most setups.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the LAN8720 module compatible with STM32 and ESP32 microcontrollers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The LAN8720 module uses the standard RMII interface, which is directly supported by STM32 (via HAL\/LL Ethernet libraries) and ESP32 (via ESP-IDF). 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