Microchip KSZ8873MML: A Highly Integrated 3-Port Ethernet Switch Solution for Embedded Systems

In the realm of embedded networking, achieving robust and reliable Ethernet connectivity in a compact, low-power, and cost-effective footprint is a persistent design challenge. The Microchip KSZ8873MML addresses this need directly, serving as a highly integrated 3-port Ethernet switch that combines a layer 2 switching engine with two 10/100 physical layer transceivers (PHYs) in a single monolithic chip.

This integration is the cornerstone of its value proposition. By embedding the PHYs, the KSZ8873MML eliminates the need for multiple external PHY components, which significantly reduces the total bill of materials (BOM), conserves valuable board space, and simplifies overall system design. The device features a flexible architecture: one MII (Media Independent Interface) port for connection to an external host processor or an embedded MAC, and two integrated 10/100 Ethernet PHYs with standard IEEE 802.3/802.3u compliant interfaces. This allows designers to create a compact 3-port switch, where the two PHY ports connect directly to Ethernet cables (via magnetics) and the MII port manages the upstream data flow.

The KSZ8873MML is engineered for superior performance and manageability. It supports full-duplex operation on all ports and incorporates advanced features like IEEE 802.1p priority for Quality of Service (QoS), VLAN support, and flow control. These features ensure prioritized handling of latency-sensitive traffic, such as voice or video, making it suitable for industrial automation, digital signage, network peripherals, and IoT gateways. Furthermore, its support for auto-negotiation and auto-MDI/MDIX on the PHY ports simplifies installation by automatically determining the best possible speed and duplex mode while eliminating the need for crossover cables.

Power efficiency is another critical advantage. The chip incorporates sophisticated energy-detect power-down modes, drastically reducing power consumption during periods of low link activity. This makes it an excellent choice for power-conscious applications.

ICGOODFIND: The Microchip KSZ8873MMMLL stands out as a premier highly integrated, cost-optimized solution for adding multi-port Ethernet switching capabilities. Its combination of internal PHYs, a small form factor, low power draw, and advanced management features provides an exceptional balance of performance and efficiency, accelerating development for a wide array of embedded networking applications.

Keywords:

Ethernet Switch

Integrated PHY

MII Interface

Quality of Service (QoS)

Power Efficiency