A Comprehensive Overview of the Microchip KSZ8841-16MVLI-TR Dual-Port Ethernet Switch Controller

In the realm of embedded networking, the demand for robust, integrated, and cost-effective solutions is ever-present. The KSZ8841-16MVLI-TR from Microchip Technology stands as a pivotal component in this space, offering a highly integrated dual-port Ethernet switch controller designed to simplify the implementation of advanced networking features in a wide array of applications.

This device is a single-chip solution that integrates two 10/100 Ethernet physical-layer transceivers (PHYs), a media access control (MAC) layer, and a non-blocking switch fabric. This high level of integration is a key advantage, significantly reducing the bill of materials (BOM) and board space required to add dual Ethernet ports with switching capability to a design. It is particularly well-suited for applications such as network printers, network-attached storage (NAS) devices, industrial control systems, and embedded telecommunication equipment.

The core functionality of the KSZ8841-16MVLI-TR revolves around its efficient switching engine. It supports full-duplex operation on both ports with IEEE 802.3x flow control, ensuring optimal data throughput and preventing packet loss during periods of congestion. The integrated switch fabric operates at wire speed, meaning it can handle the maximum data rate on all ports simultaneously without introducing latency or becoming a bottleneck.

A critical feature of this controller is its flexible host interface. It connects seamlessly to a wide range of embedded processors and microcontrollers via a standard 8-bit or 16-bit bus interface. This flexibility allows designers to incorporate advanced networking into their systems without requiring a high-performance CPU with a dedicated Ethernet controller, thus providing significant design versatility.

Beyond basic switching, the KSZ8841-16MVLI-TR is equipped with a comprehensive set of management and QoS (Quality of Service) features. It supports VLAN (Virtual Local Area Network) tagging, priority queues, and traffic prioritization based on IEEE 802.1p, making it capable of managing differentiated network traffic—a crucial requirement for industrial and multimedia applications where timing is critical. For security and network management, it offers support for port-based access control and MIB (Management Information Base) counters.

The device also incorporates power management capabilities, including a wake-on-LAN function, which is essential for energy-conscious applications. Packaged in a compact 128-pin LQFP, the "TR" suffix indicates it is supplied on a tape and reel, making it ideal for high-volume, automated manufacturing processes.

ICGOOODFIND: The Microchip KSZ8841-16MVLI-TR is an exceptionally integrated and versatile dual-port switch controller that delivers professional-grade networking features, simplifies design complexity, and reduces overall system cost for a multitude of embedded applications.

Keywords: Dual-Port Ethernet Switch, Integrated PHY, Non-Blocking Fabric, Quality of Service (QoS), Host Bus Interface