KSZ9031RNXVC datasheet(4/78 Pages) MICROCHIP

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KSZ9031RNX

DS00002117C-page 4

 2016 Microchip Technology Inc.

1.0

INTRODUCTION

1.1

General Description

The KSZ9031RNX is a completely integrated triple-speed (10BASE-T/100BASE-TX/1000BASE-T) Ethernet physical-

layer transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable.

The KSZ9031RNX provides the Reduced Gigabit Media Independent Interface (RGMII) for direct connection to RGMII

MACs in Gigabit Ethernet processors and switches for data transfer at 10/100/1000 Mbps.

The KSZ9031RNX reduces board cost and simplifies board layout by using on-chip termination resistors for the four

differential pairs and by integrating an LDO controller to drive a low-cost MOSFET to supply the 1.2V core.

The KSZ9031RNX offers diagnostic features to facilitate system bring-up and debugging in production testing and in

product deployment. Parametric NAND tree support enables fault detection between KSZ9031 I/Os and the board. The

LinkMD® TDR-based cable diagnostic identifies faulty copper cabling. Remote and local loopback functions verify ana-

log and digital data paths.

The standard KSZ9031RNX is available in a 48-pin, lead-free QFN package, and the AEC-Q100 automotive qualified

parts, KSZ9031RNXUA and KSZ9031RNXVA, are available in a 48-pin lead-free WQFN package.

FIGURE 1-1:

SYSTEM BLOCK DIAGRAM

RGMII

10/100/1000Mbps

RGMII

ETHERNET MAC

MDC/MDIO

MANAGEMENT

KSZ9031RNX

LDO

CONTROLLER

VIN

3.3VA

VOUT

1.2V (FOR CORE VOLTAGES)

RJ-45

CONNECTOR

MEDIA TYPES

10Base-T

100Base-TX

1000Base-T

(SYSTEM POWER CIRCUIT)

PME_N

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