VSC8491YJU-14

Overview

The VSC8491YJU-14 is a single-channel 10 Gigabit Ethernet Physical Layer Transceiver (PHY) manufactured by Microchip Technology. It operates at data rates up to 10 Gb/s and utilizes XFI/SFI interfaces for connectivity. The component is housed in an FCBGA-484 surface-mount package, designed for high-density telecommunications and networking applications requiring robust physical layer signal integrity.

Feature Summary

• Supports 10 Gigabit Ethernet data transmission standards
• Integrates XFI/SFI serial interface connectivity
• Designed for high-speed physical layer signal processing

Applications

• Telecommunications infrastructure equipment
• High-speed network switches and routers
• Data center interconnect solutions

Procurement Notes

This component is classified as End-of-Life (EOL) or obsolete by the manufacturer. Availability is restricted, and current stock levels are limited. Procurement should focus on verifying authenticity through authorized channels and checking for valid replacement alternatives due to discontinuation status.

Selection Notes

Select this part only if legacy compatibility with existing 10GbE designs is required. Verify that the FCBGA-484 footprint matches the PCB layout. Consider newer Microchip PHY families for new designs to ensure long-term supply chain stability and updated feature sets.

Part Context

The VSC8491 series belongs to Microchip's portfolio of high-performance Ethernet PHYs. This specific model targets single-port 10G applications, distinguishing it from dual or quad variants within the same family. It serves as a critical interface between MAC layers and optical or copper media converters.

Replacement Considerations

As an obsolete part, direct substitutes may be limited. Review Microchip's official Product Change Notifications (PCNs) for recommended replacements. Ensure any alternative maintains compatible pinout and electrical specifications for seamless integration.