MCHPKSZ9031RNXIA

Overview

The KSZ9031RNXIA is a single-port 10/100/1000 Ethernet PHY from Microchip intended for embedded and industrial networking applications. It provides a PHY interface to a host MAC (SoC, FPGA, or microcontroller) to add Gigabit Ethernet physical-layer connectivity. Designers commonly use it where a compact, discrete PHY is required on custom boards or industrial products.

Why Choose This Part

As a dedicated single-port Gigabit PHY, the KSZ9031RNXIA lets you separate the physical-layer implementation from the host MAC, simplifying board-level EMC/magnetics and connector placement. It's a common, well-established PHY option with reference schematics and application notes from Microchip, making integration into custom boards straightforward. Using a discrete PHY also gives flexibility to choose magnetics, PoE arrangements, and layout optimizations independently of the host processor.

Applications

Getting Started

Start with the KSZ9031RNXIA datasheet and Microchip reference schematics to understand required magnetics, decoupling, and power sequencing. Plan for the required RJ45/magnetic module and check board layout rules for high-speed Ethernet signals. Confirm software support on your host (Linux or RTOS) and the PHY driver/MDIO configuration method; you can verify link bring-up using standard network test tools once connected.

KSZ9031 Family

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