MCHPKSZ9031RNXIA-TR

Overview

The KSZ9031RNXIA-TR is a single-port 10/100/1000Mbps Gigabit Ethernet transceiver designed for high-speed data transmission over standard CAT-5 unshielded twisted pair cable. It features a Reduced Gigabit Media Independent Interface (RGMII) for direct connection to RGMII-compliant MACs in processors and FPGAs. This industrial-grade PHY supports three power-down modes and integrated LDO controller to simplify system design.

Why Choose This Part

This transceiver excels in thermal performance and PCB space efficiency due to its 48-pin VQFN package with wettable flanks and an exposed pad. It simplifies board design by integrating on-chip termination resistors for the differential pairs and an internal LDO controller to drive a low-cost MOSFET for the core voltage. Its wide industrial temperature range of -40C to +85C ensures stability in demanding environments.

Applications

Getting Started

To evaluate this PHY, Microchip offers the EVB-KSZ9031RNX evaluation board which breaks out the RGMII and MDIO interfaces. Implementation requires careful trace matching on the RGMII lines to satisfy timing requirements, and the MDIO/MDC bus is used for register configuration. Reference the manufacturer's IBIS models and PCB layout guidelines to ensure signal integrity at Gigabit speeds.

KSZ9031 Family

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