Ethernet ICs 10/100 BASE-TX Physical Layer Transceiver

KSZ8081RNAIA-TR – RMII Ethernet Transceiver IC – Microchip Technology

Optimize your network designs with the KSZ8081RNAIA-TR from Microchip Technology, a high-performance Ethernet transceiver IC enabling reliable 10/100 Mbps communication. This surface-mount solution simplifies integration while offering versatile voltage support and industrial-grade temperature resilience – perfect for space-constrained embedded systems requiring robust connectivity.

Key Features

• Interface Protocol: RMII (Reduced Media Independent Interface)
• Voltage Support: Flexible 1.8V, 2.5V, or 3.3V operation
• Duplex Mode: Full-duplex data transmission
• Drivers/Receivers: 1 Tx / 1 Rx channel configuration
• Temperature Range: Industrial-grade -40°C to +85°C
• Package: Compact 24-QFN (4×4 mm) surface-mount design

Technical Specifications

This IEEE 802.3-compliant transceiver integrates physical layer (PHY) functions in a 24-VFQFN exposed pad package. Featuring auto-negotiation and auto-MDIX capabilities, it eliminates crossover cables while supporting energy-efficient Ethernet (EEE) for reduced power consumption. The RMII interface minimizes pin count versus standard MII, enabling cost-effective PCB layouts. Its advanced DSP technology ensures signal integrity in noisy environments.

Typical Applications

• Industrial automation controllers and PLCs
• IoT gateways and edge computing devices
• Networked medical monitoring equipment
• Embedded computing and single-board computers
• Smart energy management systems

About Microchip Technology

Microchip Technology stands as a global leader in microcontroller, mixed-signal, and connectivity solutions, renowned for innovation in embedded control systems. With over three decades of industry expertise, their semiconductor products power mission-critical applications across automotive, industrial, and communications sectors.

Microchip maintains rigorous quality certifications including IATF 16949 and ISO 9001, ensuring consistent reliability. Their commitment to long-term product lifecycle support makes them a preferred partner for design engineers requiring stable component sourcing and comprehensive technical documentation.

About Ethernet Transceiver ICs

Ethernet transceivers serve as the critical bridge between digital processors and physical network cables, handling analog signal conversion, noise filtering, and link management. These ICs enable devices to comply with Ethernet standards while managing electrical characteristics like impedance matching and signal conditioning.

Modern transceivers like the KSZ8081 series reduce system complexity by integrating termination resistors and voltage regulators. Their low-power designs extend battery life in portable devices, while industrial temperature ratings ensure operation in harsh environments where network reliability is non-negotiable.

Packaging Options

Available in industry-standard formats for automated assembly: Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® packaging. Specify your preferred option during checkout.

Frequently Asked Questions

Question: Is this IC compatible with 100BASE-TX and 10BASE-T standards?
Answer: Yes, it fully supports both 10Mbps and 100Mbps Ethernet operation per IEEE 802.3 specifications.

Question: Does it require external magnetics?
Answer: Yes, external magnetics are required per standard Ethernet PHY implementation – refer to the datasheet for circuit guidelines.

Question: Can I use this with 3.3V microcontrollers?
Answer: Absolutely – its selectable I/O voltage (1.8V/2.5V/3.3V) enables direct interface with most modern processors.

Question: What is the typical power consumption?
Answer: Typical operating current is 98mA at 3.3V with Energy Efficient Ethernet enabled (see datasheet section 5.3).

Question: Is this RoHS compliant?
Answer: Yes, this active-status component meets current RoHS 3 directives.

Question: How does RMII differ from standard MII?
Answer: RMII reduces signal lines from 16 to 6 by halving the data bus width and doubling the clock speed to 50MHz, saving board space.

⚠️ Disclaimer: Product images are representational only. Refer to datasheets for exact specifications.

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