KSZ8031RNL TR Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
Microchip KSZ8031RNL TR is a 10BASE-T/100BASE-TX Ethernet PHY transceiver operating from a single 3.3 V supply, integrating MII and RMII MAC interfaces in a compact 24-pin QFN package. It supports auto-negotiation, HP Auto-MDIX, and energy-detect power-down, making it suitable for embedded Ethernet in industrial controllers, routers, and IoT gateways.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 25
- Lifecycle
- ACTIVE
- Datasheet
- KSZ8031RNL TR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 10BASE-T and 100BASE-TX Ethernet PHY with auto-negotiation
- Single 3.3 V supply operation simplifying power design
- MII and RMII MAC interface options for flexible MCU connectivity
- HP Auto-MDIX eliminates need for crossover cables
- Energy-detect power-down mode for low standby power
- 24-pin QFN compact package for space-constrained designs
Applications
KSZ8031RNL TR is used in embedded Ethernet applications including industrial automation controllers, managed network switches, IoT gateways, and single-board computers that require a standalone 10/100 PHY connected to an RMII or MII MAC. Its HP Auto-MDIX and energy-detect features reduce system integration complexity and power consumption in always-on connected devices.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Does KSZ8031RNL TR support both RMII and MII MAC interfaces for flexible processor integration?
Yes. KSZ8031RNL TR supports both MII and RMII interface modes, selectable via configuration pins at power-up. RMII uses only 2 data pins at 50 MHz versus MII's 4-bit nibble bus at 25 MHz, reducing GPIO consumption on MCUs and SoCs that have limited Ethernet MAC pins.
What supply voltage does KSZ8031RNL TR require, and does it support 100 Mbps line rate?
KSZ8031RNL TR operates from a single 3.3 V supply and supports both 10 Mbps and 100 Mbps Ethernet via auto-negotiation, automatically selecting the fastest speed supported by the link partner. No separate analog or digital core supply is needed, simplifying the power section of the PCB.
How does the HP Auto-MDIX feature of KSZ8031RNL TR simplify cable installation in industrial Ethernet wiring?
HP Auto-MDIX automatically detects whether the connected cable is a straight-through or crossover type and configures the internal transmit and receive pairs accordingly. This eliminates the need for crossover cables between switches, controllers, and PCs in industrial installations, reducing installation errors in factory floor wiring.
Is the 24-pin QFN package of KSZ8031RNL TR thermally adequate for continuous 100 Mbps operation?
Yes. The 24-pin QFN package includes an exposed thermal pad that conducts heat to the PCB ground plane. At 100 Mbps continuous operation the device dissipates well under 200 mW, which is easily managed with a standard 2-layer PCB copper pour without additional heatsinking or airflow.
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