KSZ8864CNXCA

Controllers Overview

The KSZ8864CNXCA is a Layer 2 managed Ethernet switch featuring four MACs and two integrated 10/100Base-T/TX PHYs. It utilizes a non-blocking shared memory switch fabric with 1.4 Gbps bandwidth and an on-chip 64 Kbyte frame buffer. The device supports up to 128 VLAN groups, IEEE 802.1p/q tagging, and IGMP v1/v2 snooping. Management interfaces include SPI (up to 25 MHz), I2C, and MDC/MDIO. Ports 3 and 4 provide selectable MII or RMII interfaces for host connectivity. Power supplies are 3.3V analog, 1.2V core, and 1.8V/2.5V/3.3V digital I/O. It operates in the commercial temperature range of 0°C to +70°C within a 64-pin QFN package.

Controllers Feature Summary

• Integrated Layer 2 management capabilities including VLAN support, rate limiting, and broadcast storm protection.
• Dual interface flexibility allowing Port 3 and Port 4 to operate as either MII or RMII connections.
• Advanced quality of service features supporting per-port prioritization, weighted fair queuing, and DiffServ.
• Comprehensive monitoring tools including port mirroring, sniffing, and extensive MIB counters.

Controllers Applications

• VoIP Phone systems
• Set-Top boxes and Game consoles
• Industrial Control networks
• Broadband Gateways and Firewalls
• Wireless LAN Access Points

Controllers Procurement Notes

Verify component authenticity through authorized Microchip Technology distributors. Confirm that the specific ordering suffix matches the required voltage and temperature specifications. Ensure proper handling procedures are followed due to moisture sensitivity classification. Cross-reference datasheet revision numbers to ensure compatibility with existing design documentation.

Controllers Selection Notes

Select this component when a compact 4-port solution with dual CPU interfaces is required. Verify that the system design accommodates the specific power supply requirements for analog, core, and I/O domains. Ensure the host processor supports the selected management interface protocol. Check pin configuration straps if operating in unmanaged mode without external EEPROM.

Controllers Part Context

This part belongs to the KSZ8864 family of high-performance Ethernet switches. It serves as a cost-effective alternative to larger multi-port solutions while maintaining managed switching features. The device is designed to replace legacy discrete PHY and switch controller combinations by integrating all necessary functions into a single small package.

Controllers Replacement Considerations

The KSZ8864RMNUB is a qualified automotive version of this device. Designers requiring industrial temperature ranges should consider the KSZ8864CNXIA variant. Both variants maintain pin compatibility with the standard commercial grade model.