The KSZ8864CNXIA-TR: A Compact Powerhouse for Managed Ethernet Switching

In the realm of networked industrial, enterprise, and embedded systems, reliable and managed connectivity is paramount. The Microchip KSZ8864CNXIA-TR stands out as a highly integrated, 4-port 10/100 managed Ethernet switch IC engineered to deliver robust performance and advanced features in a compact, low-power package. This device simplifies design while providing the critical control needed for sophisticated network segments.

Core Architecture and Key Features

This switch IC integrates four 10/100 Ethernet physical-layer transceivers (PHYs), a layer-2 switching engine, and buffer memory into a single chip. Its managed capabilities are a significant differentiator, offering granular control over network traffic through a standard MIIM (Management Data Input/Output Interface) clause 22/45 compatible interface. This allows for detailed management via an external microcontroller or processor, enabling features like:

VLAN (Virtual Local Area Network) Support: For segmenting network traffic to enhance security and efficiency.

Quality of Service (QoS) Prioritization: Ensures low latency for time-sensitive data such as voice or video by implementing priority queues based on IEEE 802.1p.

Advanced Switching Controls: Includes support for port-based ingress/egress rate limiting, broadcast storm protection, and multicast filtering.

Comprehensive Status Monitoring: Provides detailed diagnostics for link, activity, speed, and duplex mode per port.

The KSZ8864CNXIA-TR is designed for flexibility, supporting multiple industrial temperature ranges (-40°C to +85°C) and available in a space-saving 64-pin QFN package, making it ideal for applications where board space and environmental resilience are critical concerns.

Typical Applications

This IC is perfectly suited for a wide array of applications where a small number of managed ports are required. Key markets include:

Industrial Automation and Control Systems (ICS): For connecting PLCs, sensors, and controllers on a managed factory floor network.

Enterprise Network Peripherals: Such as managed network printers and IP telephone systems.

Internet of Things (IoT) Gateways: Providing secure and prioritized connectivity for multiple end devices.

Embedded Systems: In applications requiring reliable, managed inter-board communication.

ICGOODFIND: The Microchip KSZ8864CNXIA-TR is an exceptional solution for designers seeking to add managed Layer 2 switching functionality without the complexity and cost of a larger standalone switch. Its high level of integration, advanced feature set, and industrial robustness make it a compelling choice for creating intelligent and efficient network edges.

Keywords: Managed Ethernet Switch, VLAN Support, Quality of Service (QoS), Industrial Temperature, Layer 2 Switching.