KSZ9031MNXIATR Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
KSZ9031MNXIATR is a single-port Gigabit Ethernet physical layer transceiver supporting GMII and MII interfaces with 1.8V to 3.3V I/O in a 64-pin QFN package. It supports 10/100/1000 Mbps auto-negotiation and EEE (IEEE 802.3az) for energy efficiency. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 65
- Lifecycle
- ACTIVE
- Datasheet
- KSZ9031MNXIATR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of KSZ9031MNXIATR?
- Single-port Gigabit Ethernet PHY with 10/100/1000 Mbps auto-negotiation
- GMII and MII host interface supporting 1.8V to 3.3V I/O
- IEEE 802.3az Energy Efficient Ethernet (EEE) for power savings
- Compact 64-pin QFN 9x9mm package for space-constrained PCBs
- 1.2V core supply with 1.8V or 3.3V I/O flexibility
- Integrated MDI/MDIX auto-crossover for cable polarity independence
What is KSZ9031MNXIATR used for?
KSZ9031MNXIATR is used in embedded Gigabit Ethernet applications such as industrial automation controllers, network switches, and single-board computers where a compact 64-pin QFN footprint and flexible 1.8V/3.3V I/O are required. Its EEE support reduces power consumption during idle link periods, making it well-suited for green networking equipment and always-on IoT gateways. The GMII/MII interface provides straightforward integration with popular application processors and FPGAs in both consumer and industrial Ethernet designs.
What are the specifications of KSZ9031MNXIATR?
| Reach Compliance Code | Compliant |
| Data Rate | 1000000Mbps |
| JESD-30 Code | S-PQCC-N64 |
| Number of Transceivers | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC64,.32SQ,16 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER |
| Power Supplies | 1.2,1.8/3.3 V |
| Qualification Status | Not Qualified |
| Subcategory | Network Interfaces |
| Surface Mount | YES |
| Telecom IC Type | ETHERNET TRANSCEIVER |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.4mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the KSZ9031MNXIATR datasheet?
KSZ9031MNXIATR Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for KSZ9031MNXIATR?
Compatible alternatives and drop-in replacements for KSZ9031MNXIATR:
Frequently Asked Questions
What host interface modes does KSZ9031MNXIATR support, and at what data rates do they operate?
KSZ9031MNXIATR supports GMII at 1000 Mbps and MII at 10/100 Mbps, allowing the same PHY to connect to a wide range of MACs and application processors. Auto-negotiation selects the appropriate link speed, simplifying firmware design in multi-speed industrial Ethernet applications without requiring separate PHY devices for each speed tier.
How does IEEE 802.3az Energy Efficient Ethernet reduce power in KSZ9031MNXIATR-based designs during low-traffic periods?
IEEE 802.3az allows KSZ9031MNXIATR to enter a low-power idle (LPI) state during link inactivity, reducing PHY power draw from approximately 350 mW at full Gigabit load to under 100 mW in idle, saving more than 200 mW per port in network switches and industrial gateways with bursty traffic profiles.
Is KSZ9031MNXIATR suitable for industrial control systems that require mixed 1.8V and 3.3V board designs?
Yes. KSZ9031MNXIATR uses a separate 1.2V core supply and configurable 1.8V or 3.3V I/O supply, allowing its GMII/MII signals to directly interface with 1.8V FPGAs or 3.3V microprocessors without level shifters. This dual-voltage architecture covers both modern low-power SoCs and legacy 3.3V MAC controllers common in industrial automation equipment.
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