KSZ9031 Series

Gigabit Ethernet Transceiver with Power Saving Features

Catalog

Gigabit Ethernet Transceiver with Power Saving Features

Part	Package / Case	Duplex	Supplier Device Package	Number of Drivers/Receivers [custom]	Number of Drivers/Receivers [custom]	Mounting Type	Voltage - Supply	Type	Operating Temperature [Max]	Operating Temperature [Min]	Protocol	Data Rate	Qualification	Grade
Microchip Technology KSZ9031RNXCA	48-VFQFN Exposed Pad	Full	48-QFN (7x7)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	70 °C	0 °C	Ethernet
Microchip Technology KSZ9031MNXIC	64-VFQFN Exposed Pad	Full	64-QFN (8x8)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	85 °C	-40 °C	Ethernet	1 Gbps
Microchip Technology KSZ9031MNXCA	64-VFQFN Exposed Pad	Full	64-QFN (8x8)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	70 °C	0 °C	Ethernet
Microchip Technology KSZ9031RNXIA-TR	48-VFQFN Exposed Pad	Full	48-QFN (7x7)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	85 °C	-40 °C	Ethernet
Microchip Technology KSZ9031MNXIA	64-VFQFN Exposed Pad	Full	64-QFN (8x8)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	85 °C	-40 °C	Ethernet	1000 Mbps
Microchip Technology KSZ9031RNXIC	48-VFQFN Exposed Pad	Full	48-QFN (7x7)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	85 °C	-40 °C	Ethernet
Microchip Technology KSZ9031MNXCC-TR	64-VFQFN Exposed Pad	Full	64-QFN (8x8)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	70 °C	0 °C	Ethernet
Microchip Technology KSZ9031RNXCC	48-VFQFN Exposed Pad	Full	48-QFN (7x7)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	70 °C	0 °C	Ethernet
Microchip Technology KSZ9031RNXVB-VAO	48-VFQFN Exposed Pad	Full	48-VQFN (7x7)	4	4	Surface Mount Wettable Flank	1.8 V 2.5 V 3.3 V	Transceiver	105 °C	-40 °C	Ethernet		AEC-Q100	Automotive
Microchip Technology KSZ9031RNXIC-TR	48-VFQFN Exposed Pad	Full	48-QFN (7x7)	4	4	Surface Mount	1.8 V 2.5 V 3.3 V	Transceiver	85 °C	-40 °C	Ethernet

Catalog

Gigabit Ethernet Transceiver with Power Saving Features

Key Features

• **•**Single-chip 10/100/1000Mbps IEEE 802.3 compliant Ethernet transceiver

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• **•**KSZ9031Mxx feature GMII/MII standard interface with 3.3V/2.5V/1.8V tolerant I/Os

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• **•**KSZ9031Rxx 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

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• **•**GMII/MII/RGMII with 3.3V/2.5V/1.8V tolerant I/Os

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• **•**Auto-negotiation to automatically select the highest linkup speed (10/100/1000Mbps) and duplex (half/full)

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• **•**On-chip termination resistors for the differential pairs

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• **•**On-chip LDO controller to support single 3.3V supply operation – requires only one external FET to generate 1.2V for the core

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• **•**Jumbo frame support up to 16KB

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• **•**125MHz Reference Clock Output

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• **•**Energy-detect power-down mode for reduced power consumption when the cable is not attached

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• **•**Wake-on-LAN (WOL) support with robust custom-packet detection

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• **•**AEC-Q100 qualified for automotive applications (KSZ9031RNXUB-VAO, KSZ9031RNXVB-VAO)

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• **•**Programmable LED outputs for link, activity, and speed

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• **•**Baseline wander correction

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• **•**LinkMD® TDR-based cable diagnostic to identify faulty copper cabling

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• **•**Parametric NAND tree support to detect faults between chip I/Os and board

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• **•**Loopback modes for diagnostics

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• **•**Automatic MDI/MDI-X crossover to detect and correct pair swap at all speeds of operation

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• **•**Automatic detection and correction of pair swaps, pair skew, and pair polarity

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• **•**MDC/MDIO management interface for PHY register configuration

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• **•**Interrupt pin option

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• **•**Power-down and power-saving modes

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• **•**Core (DVDDL, AVDDL, AVDDL\_PLL): 1.2V (external FET or regulator)

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

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• **•**Transceiver (AVDDH): 3.3V or 2.5V (commercial temp)

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

Description

The KSZ9031 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 KSZ9031MNX offers the industry-standard GMII/MII (Gigabit Media Independent Interface/Media Independent Interface) for connection to GMII/MII MACs in Gigabit Ethernet processors and switches for data transfer at 1000Mbps or 10/100Mbps. The KSZ9031RNX provides the reduced gigabit media independent interface (RGMII). The KSZ9031 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 KSZ9031 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, KSZ9031RNXUB-VAO and KSZ9031RNXVB-VAO, are available in the 48-pin lead-free WQFN package. The KSZ9031MNX is available in a 64-pin, lead-free QFN package. Microchip's complimentary and confidential [MicroCHECK](https://www.microchip.com/en-us/support/design-help/design-check-services) design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design. MicroCHECK design review service is subject to Microchip's [Program Terms and Conditions](https://www.microchip.com/en-us/support/design-help/design-check-services/design-check-services-program-terms-and-conditions) and requires a myMicrochip account.