KSZ8863FLLI

Controllers Overview

The KSZ8863FLLI is a highly integrated 3-port managed Ethernet switch IC manufactured by Microchip Technology. It features two 10/100BASE-T/TX copper transceivers and one 100BASE-FX fiber optic transceiver, alongside an MII interface for host connectivity. The device operates on a single 3.3V supply with an internal 1.8V LDO. It supports IEEE 802.3u standards with data rates of 10 Mb/s and 100 Mb/s. Management interfaces include SPI, I2C, SMI, and MIIM. The component functions within an industrial temperature range of -40°C to +85°C and is housed in a 48-pin LQFP package.

Controllers Feature Summary

• Supports IEEE 802.1q VLAN tagging and up to 16 VLAN groups with per-port configuration options.
• Includes bypass mode that maintains switching between copper ports when the CPU interface enters sleep mode.
• Provides LinkMD time-domain reflectometry diagnostics for identifying copper cabling faults.
• Features comprehensive QoS support including IPv4/IPv6 classification and programmable rate limiting.

Controllers Applications

• VoIP Phone systems
• Set-Top Boxes and Game Consoles
• Automotive networking modules
• Industrial Control systems
• IPTV Points of Presence

Controllers Procurement Notes

Verify the specific suffix 'I' against the manufacturer's current product identification system to confirm the exact temperature grade and package variant. Ensure the ordering documentation matches the required RoHS compliance status and lead-free specifications defined in the latest datasheet revision.

Controllers Selection Notes

Select this model over the KSZ8863MLL or KSZ8863RLL variants specifically because it includes a dedicated 100BASE-FX fiber port. Verify that the host processor can accommodate the MII interface requirements and that the system design supports the necessary 25 MHz or 50 MHz clock source for the PHY operation.

Controllers Part Context

This component belongs to the KSZ8863 family of low-power, cost-sensitive Ethernet switches. It is designed for applications requiring small footprints and advanced power management features such as energy detect modes. The FLL designation distinguishes it from the all-copper MLL and RMII-interface RLL variants within the same series.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip directly for cross-reference information regarding newer generations or alternative pin-compatible devices.