Ethernet ICs 10/100 BASE-TX Physical Layer Transceiver

KSZ8081RNBIA-TR – RMII Ethernet Transceiver IC – Microchip Technology

Optimize your network designs with the KSZ8081RNBIA-TR Ethernet transceiver from Microchip Technology. This high-performance IC delivers reliable 10/100 Mbps connectivity in space-constrained applications while supporting multiple voltage levels. Engineered for industrial environments, it simplifies integration and reduces power consumption for robust communication systems.

Key Features

• Protocol: RMII (Reduced Media Independent Interface)
• Configuration: 1 Driver / 1 Receiver with Full Duplex support
• Voltage Flexibility: Operates at 1.8V, 2.5V, or 3.3V
• Industrial Temperature Range: -40°C to 85°C
• Compact Footprint: 32-QFN (5×5) surface-mount package
• Low Power: Advanced power management modes

Technical Specifications

This single-port transceiver integrates physical layer (PHY) functions with RMII data interface support. The 32-VFQFN exposed pad package enhances thermal performance in high-density PCB layouts. Its auto-negotiation capability automatically selects optimal speed (10BASE-T/100BASE-TX) and duplex mode. Compliant with IEEE 802.3 standards, the IC features advanced cable diagnostics and error detection.

Typical Applications

• Industrial automation controllers
• Embedded networking modules
• IoT gateway devices
• Medical monitoring equipment
• Building management systems

About Microchip Technology

Microchip Technology is a global leader in microcontroller, mixed-signal, analog, and Flash-IP solutions. With over 30 years of innovation, the company consistently delivers high-reliability components for mission-critical applications across aerospace, automotive, and industrial sectors.

Microchip’s rigorous quality control processes and industry-leading certifications ensure component longevity and performance stability. Their commitment to backward compatibility and long product lifecycles makes them a preferred partner for upgradeable system designs requiring consistent supply chain support.

About Ethernet Transceivers

Ethernet transceivers serve as the physical interface between network controllers and twisted-pair cabling. They handle critical functions including signal modulation, noise filtering, and link integrity monitoring. Modern transceivers like the KSZ8081RNBIA-TR enable compact, energy-efficient network implementations without sacrificing data integrity.

These ICs are fundamental in converting digital signals to analog waveforms compliant with Ethernet standards. Their voltage tolerance and thermal resilience determine deployment viability in harsh environments. Selecting industrial-grade transceivers prevents data corruption in electrically noisy settings while extending equipment service life.

Packaging Options

Available in industry-standard formats: Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® packaging. All options support automated assembly processes. Note: Product images are representational. Refer to datasheet for exact dimensions.

Frequently Asked Questions

Q: Does this transceiver support auto-MDIX?
A: Yes, the KSZ8081RNBIA-TR features automatic MDI/MDIX crossover detection.

Q: Is an external magnetics module required?
A: Yes, standard 10/100 Ethernet magnetics with center-tap configuration are needed.

Q: Can it interface with 3.3V microcontrollers?
A: Absolutely. The transceiver’s flexible voltage supply (1.8V-3.3V) ensures direct compatibility.

Q: What cable lengths does it support?
A: It reliably transmits up to 150 meters with CAT5e cable per IEEE 802.3 specifications.

Q: How does it handle EMI in industrial settings?
A: Built-in baseline wander correction and advanced noise suppression ensure stable operation in high-interference environments.

Q: Are evaluation boards available?
A: Microchip offers development kits for this series. Download datasheet for reference designs.

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