KSZ8895RQXIA

Controllers Overview

The KSZ8895RQXIA is a Layer 2 managed, five-port Ethernet switch integrated with five MACs and five PHYs compliant with IEEE 802.3u standards. It supports 10BASE-T and 100BASE-TX speeds with a non-blocking shared memory fabric providing 1.4 Gbps bandwidth. The device features an on-chip 64 Kbyte frame buffer and a 1K MAC address lookup table. Port 5 offers dual MII/RMII interfaces (SW5-MII/RMII for MAC and P5-MII/RMII for PHY). Power requirements include a single 3.3V supply with internal 1.2V LDO or external solution, supporting VDDIO levels of 3.3V, 2.5V, and 1.8V. Operating temperature ranges from -40°C to +85°C in a 128-pin PQFP package.

Controllers Feature Summary

• Supports up to 128 active VLAN groups with per-port tag/untagged options and IEEE 802.1p/q tagging.
• Provides comprehensive management via SPI, I2C, and SMI interfaces with programmable rate limiting and QoS prioritization.
• Includes advanced filtering capabilities such as IGMP snooping, broadcast storm protection, and self-address filtering.
• Features low-power dissipation modes including energy-detect mode and full-chip hardware/software power-down.

Controllers Applications

• VoIP Phone systems
• Set-Top Boxes and Game Consoles
• Industrial Control networks
• IPTV Points of Presence (POPs)
• SOHO Residential Gateways

Controllers Procurement Notes

Verify the specific suffix 'IA' against the manufacturer's current documentation to confirm silicon revision status and pin compatibility. Ensure that the ordering information matches the exact package type and temperature grade required for the target application environment.

Controllers Selection Notes

Select this component when a managed 5-port Fast Ethernet switch with RMII interface support on Port 5 is required. Consider the industrial temperature range (-40°C to +85°C) and the need for VLAN/QoS features. Verify system voltage requirements align with the supported 3.3V analog and selectable 1.8V/2.5V/3.3V digital I/O supplies.

Controllers Part Context

This part belongs to the KSZ8895 family, which includes MQX, RQX, FQX, and MLX variants. The RQX variant specifically distinguishes itself by providing RMII interfaces for both the Switch MAC and PHY on Port 5, unlike the MQX/FQX/MLX variants which use MII interfaces. All variants share the same core switching fabric and management features.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult Microchip Technology directly for updated product recommendations or cross-reference with other members of the KSZ8895 family if interface differences (MII vs. RMII) are acceptable.