KSZ8863FLL

Controllers Overview

The KSZ8863FLL is a highly integrated 3-port managed Ethernet switch IC manufactured by Microchip Technology. It features one 100BASE-FX fiber transceiver, one 10/100BASE-T/TX copper transceiver, and one MII interface for CPU connection. The device supports data rates of 10 Mb/s and 100 Mb/s with operating temperatures ranging from 0°C to +70°C. Power supply requirements include minimum voltages of 1.69 V, 1.71 V, and 2.5 V, with maximums of 1.89 V and 3.465 V. It utilizes a 48-pin LQFP package and interfaces via I2C, MDI-X, MII, MIIM, RMII, SMI, and SPI.

Controllers Feature Summary

• Supports IEEE 802.1q VLAN tagging and removal on a per-port basis with programmable rate limiting and broadcast storm protection.
• Includes a bypass feature that sustains switching between Port 1 and Port 2 when the CPU interface enters sleep mode.
• Provides comprehensive configuration access through Serial Management Interface (SMI), MIIM, high-speed SPI, and I2C.
• Features LinkMD TDR-based cable diagnostics for identifying faults in copper cabling.

Controllers Applications

• VoIP Phone
• Set-Top Box / Game Box
• Industrial Control Systems
• SOHO Residential Gateway

Controllers Procurement Notes

Verify the specific suffix 'FLL' to confirm the inclusion of the 100BASE-FX port, as other variants like MLL or RLL differ in physical layer interfaces. Confirm the temperature grade matches the application environment, noting that industrial grades (-40°C to +85°C) may have different part numbers. Ensure the design accounts for the 48-pin LQFP footprint and humidity sensitivity class during storage and assembly.

Controllers Selection Notes

Select the KSZ8863FLL when a mixed media environment requiring both fiber and copper connectivity is necessary within a compact form factor. This model is appropriate for designs needing an MII interface for host processor communication rather than RMII. Consider the power management features, such as energy detect mode, if low power consumption is a critical system requirement.

Controllers Part Context

The KSZ8863FLL belongs to the KSZ8863 family of 3-port 10/100 Mbps switches. It shares the same core switch fabric and management features with the KSZ8863MLL and KSZ8863RLL. The primary distinction lies in the physical layer configuration; the FLL variant specifically integrates a fiber optic transceiver alongside a copper transceiver, whereas other family members utilize dual copper ports.

Controllers Replacement Considerations

Direct functional replacements within the same package and pinout are limited due to the specific FX port configuration. Evaluate the KSZ8863MLL or KSZ8863RLL only if the fiber interface can be replaced with additional copper ports. For applications requiring higher port counts or different interfaces, consider the KSZ8893 series, though pin compatibility will not exist.