KSZ9897STXI

Controllers Overview

The KSZ9897STXI is a 7-port Gigabit Ethernet managed switch IC 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 data rates of 10 Mb/s, 100 Mb/s, and 1 Gb/s with full or half duplex operation. Operating voltage ranges from 1.8 V to 3.465 V, and the maximum supply current is 750 mA. It functions within an industrial temperature range of -40°C to +85°C.

Controllers Feature Summary

• Integrates five 10/100/1000BASE-T PHY transceivers with LinkMD cable diagnostic capabilities
• Features non-blocking wire-speed switching fabric with 256kByte frame buffer and 4096 entry forwarding table
• Supports comprehensive Layer 2 management including VLAN, QoS, IEEE 802.1X access control, and spanning tree protocols
• Provides flexible host connectivity via SPI, I2C, MIIM, and in-band management interfaces

Controllers Applications

• Stand-alone 10/100/1000Mbps Ethernet switches
• VoIP infrastructure switches
• Broadband gateways and firewalls
• Wi-Fi access points
• Industrial control and automation switches

Controllers Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature rating (-40°C to +85°C) as distinct from commercial variants. Confirm the '-TR' designation indicates reel packaging if applicable to your assembly process. Ensure the 128-pin TQFP-EP package dimensions match your PCB footprint requirements. Cross-reference the latest datasheet revision for any silicon errata updates.

Controllers Selection Notes

Select this component when a managed Gigabit switch with integrated PHYs is required for space-constrained designs. The inclusion of both SGMII and RGMII/MII/RMII interfaces allows flexibility in connecting to various host processors or FPGAs. Consider the power management features like Wake-on-LAN and energy detect power-down for systems requiring low standby consumption.

Controllers Part Context

This part belongs to the KSZ9897S family of 7-port Gigabit Ethernet switches. The 'STXI' suffix specifically denotes the industrial temperature grade and surface-mount packaging. Other variants in the series may offer commercial temperature ranges or different interface configurations, such as the KSZ9897RTXC which lacks the industrial rating.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.