KSZ9021RN

Key Features

Interface Type: RGMII (Reduced Gigabit Media Independent Interface) and GMII (Gigabit Media Independent Interface)

Data Rate: 10 / 100 / 1000 Mbps Ethernet

Standards Compliance: IEEE 802.3, 802.3u, 802.3ab

Supply Voltage:

Core: 1.2 V

I/O: 3.3 V

Analog: 2.5 V / 3.3 V

Package Type: 48-pin QFN (7 mm × 7 mm)

Operating Temperature: –40 °C to +85 °C (industrial)

ESD Protection: ±2 kV HBM on all pins

Power Consumption:

< 400 mW typical (Gigabit mode)

< 180 mW typical (10/100 mode)

Auto-Negotiation: Full and half-duplex operation supported

Auto-MDIX: Automatic cable polarity detection and correction

Jumbo Frame Support: Up to 9 KB

Loopback Modes: MAC and PHY-level loopbacks for diagnostics

Clock Support: 25 MHz external reference clock or crystal

Power Management: Multiple low-power and energy-efficient modes (EEE – Energy Efficient Ethernet)

RoHS / REACH Compliant

Functional Highlights

Low-latency, high-performance RGMII interface for efficient data transfer

Enhanced transmit and receive signal quality through adaptive equalization

Integrated voltage regulators and line termination resistors

Compatible with a wide range of microcontrollers and SoCs

Internal 1.2 V regulator reduces external component requirements

Advanced diagnostic and status registers accessible via MDIO (IEEE 802.3 Clause 22/45)

Applications

Industrial Ethernet and embedded networking

Network switches and routers

IP cameras and media converters

Automotive Ethernet applications

FPGA-based network designs