KSZ9896CTXI

Controllers Overview

The KSZ9896CTXI is a 6-port Gigabit Ethernet managed switch IC from Microchip Technology. It integrates five 10/100/1000BASE-T PHY transceivers and one configurable MAC port supporting GMII, RGMII, MII, or RMII interfaces. The device features a non-blocking wire-speed switching fabric with a 256kByte frame buffer and a 4096-entry forwarding table. Electrical specifications include an operating voltage range of 1.8V to 3.465V and a maximum power supply current of 750mA. It operates within a commercial temperature range of 0°C to +70°C and is housed in a 128-pin TQFP-EP package.

Controllers Feature Summary

• Integrates five 10/100/1000BASE-T PHYs with LinkMD cable diagnostics and fast link-up capabilities.
• Supports advanced Layer 2 management including IEEE 802.1Q VLANs, QoS prioritization, and IEEE 802.1X access control.
• Provides flexible host connectivity via SPI, I2C, MIIM, or in-band management through any data port.

Controllers Applications

• Stand-alone 10/100/1000Mbps Ethernet switches
• VoIP infrastructure switches
• Broadband gateways and firewalls
• Wi-Fi access points
• Industrial control and automation switches

Controllers Procurement Notes

Verify the specific suffix 'XI' against the manufacturer's official documentation to confirm the industrial temperature grade (-40°C to +85°C) and packaging details. Ensure compatibility with the required voltage levels for the host processor interface. Check for the latest silicon errata sheets to identify any known operational deviations or recommended workarounds before finalizing the design.

Controllers Selection Notes

Select this component when a high-density 6-port solution is required with integrated PHYs and comprehensive Layer 2 management features. The configurable MAC port allows direct connection to host processors or other network devices. Consider the thermal requirements and power consumption profiles relative to the system's cooling capabilities and energy efficiency standards.

Controllers Part Context

This part belongs to the KSZ9896 series of Gigabit Ethernet switches. Variants within the series may differ in temperature ratings, such as commercial (CTXC) versus industrial (CTXI) grades, or packaging types like tape-and-reel options. The core switching engine and feature set remain consistent across these variants, differing primarily in environmental specifications and supply chain packaging.

Controllers Replacement Considerations

Consult the manufacturer's product selection guide for verified cross-reference part numbers. Substitutes must match the pinout, package dimensions, and electrical characteristics. Verify that alternative components support the same interface protocols and management features required by the existing system design.

Controllers FAQ

What interface modes are supported on Port 6?

Port 6 supports configurable GMII, RGMII, MII, and RMII interfaces for connection to a host processor or controller.

Does the device support cable diagnostics?

Yes, the integrated PHYs include LinkMD cable diagnostic capabilities to determine cable opens, shorts, and length.

How is the device managed?

Management is available via high-speed SPI, I2C, MIIM interfaces, or in-band management through any of the data ports.