【High Performance Ethernet Interface】 10/100Mbps RMII interface; 25MHz crystal with internal PLL; 1500V isolation; -40°C to 85°C wide temperature range; Suitable for industrial and embedded systems
【Auto MDIX Functionality】 HP Auto-MDIX supports straight or crossover cables; eliminates manual configuration; simplifies network setup in smart home gateways and IP cameras
【Low Power Consumption Design】 Operating current ≤54mA at 100Mbps; 0.1µA in shutdown mode; 1.2V internal regulator for simplified power design; compatible with STM32 and ESP32 platforms
【Robust Electrical Characteristics】 10-bit resolution; ±0.1% accuracy; 100Ω impedance matching; 5V logic level support; ensures stable communication in noisy Settings
【Easy Integration and Compatibility】 QFN-24 package with thermal pad grounding; 1.6V to 3.6V I/O voltage range; 3.0V to 3.6V analog supply; works with LabVIEW, MATLAB, and for Arduino development boards

Product Parameters ( )

Master Chip: LAN8720A (Microchip , Reliable)

Interface: RMII (10BASE-T/100BASE-TX, IEEE 802.3-2005)

Supply Voltage:

Logic Side (VDDIO): 1.6V-3.6V DC (LVCMOS I/O, Requires 10µF Ceramic Capacitor)

Analog Side (VDD): 3.0V-3.6V DC (Ripple

Data Rate: 10/100 Mbps (Auto-Negotiation)

Power Consumption:

Operating Current: ≤54mA (Typical, 100Mbps Full Duplex)

Standby Current: 0.1µA (Shutdown Mode)

Clock: 25MHz ±50ppm Crystal (Internal PLL to 50MHz RMII Ref Clock)

Isolation: 1500V RMS

Temperature: -40℃ to +85℃ (Reliable)

Package: QFN-24 (4x4mm, Center Pad to GND)

Key Features

HP Auto-MDIX for automatic straight/crossover cable detection

Integrated 1.2V regulator (configurable enable/disable)

Supports auto-negotiation for speed/duplex selection

Compact design for embedded applications (PLC, Smart Home, IP Camera)

Compatible with STM32/ESP32 controllers

Pin Functions (Hardware Interface)

Power/GND:

VDDIO: Logic power (1.6V-3.6V) with 0.1µF+10µF capacitors

VDD: Analog power (3.0V-3.6V), keep away from digital noise

GND: Common ground (star point, impedance ≤0.1Ω)

CRS_DV: Carrier sense (external 4.7kΩ pull-up)

Control:

nRST: Hardware reset (active low, >1µs pulse)

nINT/REFCLKO: Interrupt output or 50MHz clock (mode by LED2)

PHYAD0: PHY address (open=0, VDDIO=1)

Network Interface:

TXP/TXN: Differential transmit pair (100Ω impedance)

RXP/RXN: Differential receive pair

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