KSZ8864CNXCA-TR

Controllers Overview

The KSZ8864CNXCA-TR is a Layer 2 managed 4-port Ethernet switch manufactured by Microchip Technology. It integrates four MACs and two 10/100Base-T/TX PHYs within a 64-pin QFN package. The device supports MII and RMII interfaces on Port 3 and Port 4, enabling flexible CPU connectivity. It features a non-blocking shared memory switch fabric with 1.4 Gbps bandwidth and 64 Kbyte frame buffering. Electrical specifications include a core voltage of 1.2V, I/O voltages of 3.3V, 2.5V, or 1.8V, and an analog supply of 3.3V. The commercial temperature range is defined from 0°C to +70°C.

Controllers Feature Summary

• Supports IEEE 802.1q VLAN tagging and up to 128 VLAN groups
• Includes programmable rate limiting and broadcast storm protection
• Provides IPv4/IPv6 QoS support with per-port prioritization
• Features LinkMD cable diagnostics for copper cabling fault identification

Controllers Applications

• VoIP Phone systems
• Set-Top and Game Boxes
• Industrial Control networks
• SOHO Residential Gateways
• Wireless LAN Access Points

Controllers Procurement Notes

Verify the specific ordering suffix against official datasheets to confirm the exact temperature grade and packaging configuration. Ensure that the required serial bus interface (SPI, I2C, or SMI) matches the system design constraints. Confirm lead times directly with authorized distributors as availability fluctuates based on production schedules.

Controllers Selection Notes

Select this component when a cost-sensitive, low-power managed switch solution is required for embedded applications. Verify that the host processor can support the necessary SPI or MDC/MDIO management interfaces. Consider the available MAC interfaces if connecting to external processors via MII or RMII protocols.

Controllers Part Context

This part belongs to the KSZ8864 family of integrated Ethernet switches. It serves as a compact solution for 4-port switching applications requiring Layer 2 management capabilities. The device is designed to replace discrete switch controller and PHY combinations in space-constrained designs.

Controllers Replacement Considerations

Public confirmed substitute part numbers: KSZ8864CNXC-TR, KSZ8864CNXI-TR, KSZ8864CNXIA-TR.