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Overview

The KSZ9131RNXU-VAO is a fully integrated three-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physical layer transceiver for sending and receiving data over standard CAT-5, CAT-5e, and CAT6 unshielded twisted pair (UTP) cables.

KSZ9131RNX provides simplified Gigabit media independent interface RGMII, KSZ9131MNX provides industry standard GMII/MII(Gigabit Media Independent Interface/Media Independent Interface) for connecting to GMII/MII MAC in Gigabit Ethernet processors and switches, Transfer data at 1000Mbps or 10/100Mbps.

The KSZ9131 uses on-chip termination resistors for four differential pairs and integrates an LDO controller to drive low-cost MOSFETs to power the 1.2V core, reducing board costs and simplifying board layout.

Features of KSZ9131

Single-chip 10/100/1000Mbps IEEE 802.3 compatible Ethernet transceivers

GMII/MII/RGMII, with an I/O that can withstand 3.3V/2.5V/1.8V voltage

Auto negotiation to automatically select maximum link speed (10/100/1000Mbps) and duplex (half duplex/full duplex)

On-chip terminal resistors for differential pairs

With the on-chip LDO controller, 3.3V single power supply is supported - only one external FET is needed to generate 1.2V for the core

Jumbo frames up to 16KB are supported

125MHz reference clock output

Energy detection power failure mode reduces power consumption when cables are not connected

Support LAN wake up (WOL), with a powerful custom packet detection function

Programmable LED output for links, activity, and speed

Baseline drift correction

Identify faulty copper cables with LinkMD® TDR cable diagnostics

Supports parametric NAND tree to detect faults between chip I/O and board

Loopback mode for diagnosis

With the automatic MDI/MDI-X divider, pair exchanges can be detected and corrected at all operating speeds

MDC/MDIO management interface for configuring the PHY register

Automatically detects and corrects pair exchange, pair skew and pair polarity

Interrupt pin option

Power failure and power saving mode

Operating voltage: Core (DVDDL, AVDDL, AVDDL_PLL) : 1.2V (external FET or regulator) VDD I/O (DVDDH) : 3.3V, 2.5V or 1.8V

Transceiver (AVDDH) : 3.3V or 2.5V (commercial temperature)

Core (DVDDL, AVDDL, AVDDL_PLL) : 1.2V (external FET or regulator)

VDD I/O (DVDDH) : 3.3V, 2.5V or 1.8V

Transceiver (AVDDH) : 3.3V or 2.5V (commercial temperature)

Available in 48-pin QFN (7mm x 7mm) and 64-pin QFN (8mm x 8mm) packages

Target application

• Laser/network printer

• Network Attached Storage (NAS)

• Web server

Gigabit Local Area Network (GLOM) on the motherboard

• Broadband gateway

• Gigabit SOHO/SMB router

• Internet TV

• IP set-top box

• Game console

• Three-in-one (data, voice, video) media center

• Industrial control

• Automotive in-vehicle network

The company only recovers regular channel sources, such as agents, traders, terminal factories, etc., and does not accept non-regular channel sources.