KSZ8863FLLI-TR

Controllers Overview

The KSZ8863FLLI-TR is a highly integrated 3-port managed Ethernet switch IC manufactured by Microchip Technology. It features two 10/100BASE-T/TX transceivers and one 100BASE-FX fiber 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 data rates of 10 Mb/s and 100 Mb/s, adhering to IEEE 802.3u standards. The component is housed in a 48-pin LQFP package (7x7 mm) and functions within an industrial temperature range of -40°C to +85°C.

Controllers Feature Summary

• Supports advanced Layer 2 management features including IEEE 802.1q VLAN tagging and filtering.
• Includes bypass mode to maintain switching between copper ports when the CPU interface enters sleep.
• Provides comprehensive QoS capabilities with per-port priority classification and rate limiting.
• Integrates LinkMD cable diagnostics using time domain reflectometry for copper link verification.

Controllers Applications

• VoIP Phone Systems
• IPTV Set-Top Boxes
• Industrial Control Networks

Controllers Procurement Notes

Verify the specific suffix 'I' indicates the industrial temperature grade (-40°C to +85°C). Confirm the 'TR' suffix denotes tape and reel packaging. Ensure the design utilizes the correct 48-pin LQFP footprint. Check for RoHS compliance status as required by regional regulations.

Controllers Selection Notes

Select this model over KSZ8863MLL if a fiber optic port is required instead of a second copper port. Choose KSZ8863RLL if an RMII interface is preferred over MII. Verify that the application requires the specific industrial temperature rating associated with the 'I' suffix.

Controllers Part Context

This part belongs to the KSZ8863 family of 3-port switches. It differs from the KSZ8863MLL by replacing one copper PHY with a 100BASE-FX fiber PHY. It shares the same core switch fabric and management features as the RLL variant but utilizes an MII interface rather than RMII.

Controllers Replacement Considerations

Public confirmed substitutes include KSZ8863FLL (tray packaging) or KSZ8863RLL (RMII interface variant). Verify pin compatibility and interface requirements before substitution.

Controllers FAQ

How does the bypass feature function?

The bypass mode automatically sustains switching operations between Port 1 and Port 2 when the processor connected via the MII interface enters sleep mode, ensuring system-level power savings without disrupting traffic.

What is the purpose of the FXSD pin?

Pin 48 (FXSD1) serves as the Fiber Signal Detect input for the 100BASE-FX port. It detects the presence of optical signals and can trigger Far-End Fault (FEF) signaling if the signal falls below a defined threshold.

Which interfaces are supported for register access?

The device supports Serial Management Interface (SMI), MII Management (MIIM), High-Speed SPI, and I2C for accessing internal configuration registers.