KSZ9477STXI

Controllers Overview

The KSZ9477STXI is a 7-port Gigabit Ethernet switch from Microchip Technology, housed in a 128-pin TQFP-EP package. It integrates five 10/100/1000BASE-T PHY transceivers and two configurable MAC ports: one SGMII interface and one RGMII/MII/RMII interface. The device supports IEEE 1588v2 PTP, AVB, and ring redundancy protocols like DLR and HSR. Operating within an industrial temperature range of -40°C to +85°C, it features a non-blocking wire-speed switching fabric with a 256kByte frame buffer and 4096-entry forwarding table.

Controllers Feature Summary

• Integrates five 10/100/1000BASE-T PHYs with optional Quiet-WIRE EMC filtering
• Supports IEEE 1588v2 Precision Time Protocol and Audio Video Bridging standards
• Includes hardware offloading for DLR and HSR ring redundancy protocols
• Provides flexible management via SPI, I2C, MIIM, and in-band interfaces

Controllers Applications

• Industrial Ethernet networks including Profinet, MODBUS, and Ethernet/IP
• IEC 61850 power substation automation systems
• Real-time Ethernet and networked measurement control systems

Controllers Procurement Notes

Verify the specific suffix 'STXI' against the manufacturer's current product identification system to confirm package type and temperature grade. Ensure compatibility with required voltage levels for the host processor interface. Check for any silicon errata sheets relevant to the specific revision being procured to ensure operational reliability in the target application environment.

Controllers Selection Notes

Select this component when a managed Gigabit switch with integrated PHYs and precise time synchronization is required. It is suitable for designs needing direct connection to host processors via RGMII or other switches via SGMII. Consider the industrial temperature rating and redundancy features for harsh environments where high availability and deterministic latency are critical requirements.

Controllers Part Context

This part belongs to the KSZ9477S series of highly integrated Layer 2 managed switches. It is designed to offload host processing by handling switching, filtering, and time-stamping functions internally. The series supports various interface configurations to accommodate different system architectures and connectivity needs.

Controllers Replacement Considerations

Consult the official Microchip documentation for verified substitute part numbers. Ensure any replacement maintains compatibility with the required interface types, pinout, and software configuration registers.