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Price Comparison for KSZ9031RNXIC
Details for Microchip Technology


GbE Physical Layer Transceiver
Buy Directly from Microchip Technology (4210 in Stock)
$2.6000 per unit
Series Information for KSZ9031RNXIC - Microchip Technology


  • feature
    125MHz reference clock output
  • feature
    AEC-Q100 qualified for automotive applications
  • feature
    Auto-negotiation to automatically select the highest link- up speed (10/100/1000Mbps) and duplex (half/full)
  • feature
    Energy Efficient Ethernet (EEE) support with low-power idle (LPI) mode and clock stoppage for 100Base-TX/ 1000Base-T and transmit amplitude reduction with 10Base-Te option
  • feature
    Energy detect power-down mode for reduced power consumption when the cable is not attached
  • feature
    Jumbo frame support up to 16KB
  • feature
    On-chip LDO controller to support single 3.3V supply operation u2013 requires only one external FET to generate 1.2V for the core
  • feature
    On-chip termination resistors for the differential pairs
  • feature
    RGMII timing supports on-chip delay according to RGMII Version 2.0, with programming options for external delay and making adjustments and corrections to TX and RX timing paths
  • feature
    RGMII with 3.3V/2.5V/1.8V tolerant I/Os
  • feature
    Wake-On-LAN (WOL) support with robust custom- packet detection


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 10/100/1000Mbps. 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 analog and digital data paths. The standard KSZ9031RNX is available in the 48-pin, lead-free QFN package, and the AEC-Q100 automotive qualified parts, KSZ9031RNXUA and KSZ9031RNXVA, are available in the 48-pin lead-free WQFN package (see Ordering Information). Data sheets and support documentation are available on Micrel’s web site at: www.micrel.com.


Data Rate:
Ethernet Type:
IEEE 802.3
Supply Voltage Min:
Supply Voltage Max:
Controller IC Case Style:
No. of Pins:
IC Interface Type:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
Automotive Qualification Standard:
RoHS Phthalates Compliant:
No SVHC (27-Jun-2018)

Alternate Descriptions

Avnet America

Ethernet TXRX Single Chip Single 1.8V/2.5V/3.3V 10Mbps/100Mbps/1000Mbps

Avnet America product

Microchip Technology Inc

GbE Physical Layer Transceiver

Avnet Europe

Ethernet TXRX Single Chip Single 1.8V/2.5V/3.3V 10Mbps/100Mbps/1000Mbps

Avnet Europe product

Avnet Asia

Ethernet TXRX Single Chip Single 1.8V/2.5V/3.3V 10Mbps/100Mbps/1000Mbps

Avnet Asia product



Distrelec product

Future Electronics

KSZ9031 Series 1.260 V Gigabit Ethernet Transceiver with RGMII Support - QFN-48