KSZ8794CNXCC

Controllers Overview

The KSZ8794CNXCC is a Layer 2-managed, four-port Ethernet switch integrating three 10/100BASE-T/TX MAC/PHYs and one Gigabit GMAC. It supports RGMII, MII, and RMII interfaces for the uplink port. The device features a non-blocking store-and-forward fabric with a 64 KB frame buffer and a 1024-entry forwarding table. Operating voltages include 1.2V core, 3.3V or 2.5V analog, and 3.3V, 2.5V, or 1.8V I/O. It operates within commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges in a 64-pin QFN package.

Controllers Feature Summary

• Integrated management capabilities including VLAN support, ACL filtering, and IEEE 802.1az EEE.
• Robust PHY ports with HP Auto MDI/MDIX and on-chip termination resistors.
• Advanced switch capabilities featuring programmable rate limiting and QoS prioritization.
• Flexible configuration via high-speed SPI or MII Management (MIIM) interfaces.

Controllers Applications

• Industrial Ethernet Applications
• VoIP Phone Systems
• Set-Top/Game Boxes
• Automotive Networking
• Wireless LAN Access Points

Controllers Procurement Notes

Verify the specific suffix 'CC' against official Microchip documentation to confirm exact environmental ratings and packaging specifications. Ensure compatibility with required voltage levels and interface modes before integration. Confirm RoHS compliance status through current datasheets.

Controllers Selection Notes

Select this component for designs requiring integrated managed switching with flexible uplink options. Evaluate power consumption requirements against EEE capabilities. Ensure host processor supports SPI or MIIM control protocols. Verify thermal management for the intended operating temperature range.

Controllers Part Context

This part belongs to the KSZ8794 family of integrated Ethernet switches. It shares functional similarities with other managed switch ICs but offers specific integration of three copper ports and one Gigabit interface. It is designed to reduce system cost and board space compared to discrete solutions.

Controllers Replacement Considerations

Consult official Microchip documentation for confirmed substitute part numbers. Do not assume cross-compatibility with other manufacturers' devices without verifying pinouts, electrical characteristics, and register maps.

Controllers FAQ

What interfaces are supported by the fourth port?

The fourth port supports RGMII, MII, and RMII interfaces for uplink connectivity.

How is the transmit output current configured?

It is configured using an external 1% 12.4 kΩ resistor connected to the ISET pin.

Does the device support Energy Efficient Ethernet?

Yes, it supports IEEE P802.3az Energy Efficient Ethernet (EEE) to reduce power consumption.