LAN91C111I-NU

LAN91C111I-NU Ethernet Controller Overview

The LAN91C111I-NU is a high-performance Ethernet controller manufactured by Microchip Technology, designed for embedded systems, industrial automation, and IoT applications requiring reliable 10/100 Base-T/TX PHY connectivity. This controller integrates both MAC and PHY functionality with a parallel interface, making it ideal for network-enabled devices operating in demanding environments.

Key Features & Benefits

• Dual-Speed Ethernet: Supports both 10 Mbps and 100 Mbps Ethernet standards (10/100 Base-T/TX PHY) for flexible network integration
• Integrated MAC & PHY: Complete Ethernet controller solution reduces component count and simplifies board design
• Parallel Interface: Easy integration with microcontrollers and processors
• Wide Operating Temperature: -40°C to 85°C range ensures reliable performance in industrial and automotive environments
• Low Power Operation: 3.3V supply voltage for energy-efficient designs
• Compact Package: 128-TQFP (14x14mm) footprint optimizes PCB space

Applications

• Industrial Ethernet networks and automation systems
• Embedded systems requiring network connectivity
• IoT devices and smart sensors
• Building automation and control systems
• Medical equipment with network interfaces
• Automotive diagnostic and communication modules

Design Considerations

When integrating the LAN91C111I-NU into your design, consider the following best practices:

• Power Supply Decoupling: Use appropriate bypass capacitors near the power pins to ensure stable operation and minimize noise
• PCB Layout: Follow recommended layout guidelines for high-speed Ethernet signals to maintain signal integrity
• Thermal Management: Ensure adequate thermal dissipation, especially in enclosed industrial applications
• EMI Considerations: Implement proper grounding and shielding techniques to meet EMC requirements

Why Choose HQICKEY?

At HQICKEY, we specialize in providing authentic, high-quality semiconductor components with guaranteed lifecycle support. Our extensive inventory includes a wide range of controllers for embedded, industrial, and automotive applications, ensuring you have access to the components you need when you need them.

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Order the LAN91C111I-NU today and experience reliable, authentic sourcing with fast delivery and expert technical support.

• LAN91C111I-NU.pdf