MCHPKSZ8081MNXIA-TR

Overview

The KSZ8081MNXIA-TR is a single-supply 10Base-T/100Base-TX Ethernet physical layer transceiver designed for RMII v1.2 interfaces. It features an ultra-compact 4mm x 4mm QFN package and integrates termination resistors for differential pairs to reduce BOM cost and PCB footprint. This industrial-grade PHY is optimized for low power consumption, drawing only 34mA during 100Base-TX link-up.

Why Choose This Part

It simplifies board design by integrating on-chip termination resistors and offering a 50MHz reference clock output for the MAC. The device includes LinkMD TDR-based cable diagnostics to identify cabling faults and HP Auto MDI/MDI-X for automatic crossover detection. Its small 24-pin QFN footprint and low 34mA active current make it suitable for space-constrained, power-sensitive designs.

Applications

Getting Started

To evaluate this PHY, use the KSZ8081MNX-Evaluation Board which allows for easy interfacing with external MCUs. Ensure the RMII reference clock is correctly sourced, either by the PHY's own 50MHz output or an external oscillator, and configure the MDC/MDIO management interface for register access.

KSZ8081 Family

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