KSZ8775CLXIC Features and Applications Analysis

With the rapid development of smart manufacturing, Industrial Internet of Things (IIoT), and edge computing, embedded devices require Ethernet switch chips that offer high stability, performance, and low power consumption. The KSZ8775CLXIC from Microchip is a

1. Key Features Overview

1.1 Highly Integrated 5-Port Switch

- 3 x 10/100 Mbps PHY ports (Port 1–3)

- 1 x RMII MAC port (Port 4)-connects to MCU/MPU

- 1 x RGMII/MII/RMII GMAC port (Port 5)-typically for uplink

This configuration is ideal for architectures such as edge devices + host controller + uplink.

1.2 Comprehensive Layer 2 Switching Features

- Non-blocking store-and-forward architecture

- 1024 MAC address table entries

- Port mirroring, broadcast storm protection, IEEE 802.3x flow control

- Supports RSTP (Rapid Spanning Tree Protocol) for network loop recovery

1.3 VLAN and QoS Support

- IEEE 802.1Q VLAN (tag-based and port-based)

- 4 priority queues

- QoS scheduling via Strict Priority (SP) or Weighted Round Robin (WRR)

1.4 Network Monitoring and Diagnostics

- 36 MIB counters per port for detailed traffic statistics

- MAC/PHY/remote loopback modes for debugging

- LinkMD® cable diagnostics for fault detection and cable length estimation

1.5 Flexible Management Interfaces

- SPI, I²C, and MDC/MDIO interfaces

- Auto-configuration via strap pins

- Wake-on-LAN (WoL) and power management event (PME) support

1.6 Low Power and Compact Design

- IEEE 802.3az Energy Efficient Ethernet (EEE)

- Integrated termination resistors and bias network

- 80-pin LQFP (10x10 mm) package

- Operating temperature: -40°C to +85°C

2. Typical Application Scenarios

2.1 Industrial Gateways and Edge Devices

Multiple Ethernet ports connect sensors or subsystems, while the GMAC port connects upstream. VLAN and QoS support ensure traffic isolation and priority control.

2.2 Intelligent Transportation and Surveillance

RSTP support and cable diagnostics enhance link stability and uptime for traffic control and monitoring systems.

2.3 Power Automation and Smart Metering

Ideal for concentrators or RTUs in power distribution. MIB statistics allow real-time link health monitoring, and low power operation fits energy-conscious designs.

2.4 Industrial Automation Controllers and HMIs

Multiple Ethernet ports and QoS/VLAN support allow real-time communication and multi-service isolation.

3. Conclusion

With its integrated five-port design, robust Layer 2 features, security, diagnostic capabilities, and compact low-power packaging, the KSZ8775CLXIC is a cost-effective solution for embedded and industrial Ethernet switching applications. It is well-suited for communication equipment, industrial systems, and critical nodes in smart infrastructure.