KSZ8895RQI

Controllers Overview

The KSZ8895RQI is a Layer 2 managed, five-port Ethernet switch IC manufactured by Microchip Technology. It integrates five 10/100Base-T/TX transceivers and supports both MII and RMII interfaces. The device features a non-blocking shared memory-based switch fabric with 1.4Gbps bandwidth and on-chip frame buffering. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 128-pin PQFP package. Power requirements include a single 3.3V supply with internal core voltage regulation.

Controllers Feature Summary

• Supports IEEE 802.1q VLAN for up to 128 active groups and IEEE 802.1p/q tag insertion or removal.
• Provides comprehensive management via SPI, I2C master, and SMI (MDC/MDIO) interfaces.
• Includes QoS prioritization with programmable weighted fair queuing and rate limiting.
• Features integrated power management with energy-detect mode and per-port shutdown capabilities.

Controllers Applications

• VoIP phone systems
• Set-top boxes and game consoles
• Industrial control networks
• SOHO residential gateways
• Wireless LAN access points

Controllers Procurement Notes

Verify the specific ordering suffix 'I' confirms the industrial temperature grade (-40°C to +85°C). Confirm the 'RQ' designation indicates the inclusion of SW5-RMII and P5-RMII interfaces rather than MII. Check current availability status as this component may be subject to lifecycle changes.

Controllers Selection Notes

Select the KSZ8895RQI when an industrial temperature rating is required alongside RMII connectivity for the CPU interface. Ensure the design accommodates the 128-pin PQFP footprint. Verify that the system requires Layer 2 managed switching features such as VLAN tagging and QoS prioritization before choosing this over unmanaged alternatives.

Controllers Part Context

This part belongs to the KSZ8895 family, which includes MQ and FMQ variants. The RQ variant specifically provides RMII interfaces for Port 5, distinguishing it from the MQ series which uses MII. The 'I' suffix denotes the industrial temperature extension compared to the commercial 'Q' version.

Controllers Replacement Considerations

The KSZ8895MQI serves as a functional substitute if MII interfaces are acceptable instead of RMII. The KSZ8895FMQI offers fiber optic support on Ports 3 and 4 but retains MII connectivity.