VSC8558XHJ

Overview

The VSC8558XHJ is an octal 10/100/1000BASE-T PHY featuring dual 1.25 Gbps SerDes interfaces, manufactured by Microchip Technology under the Vitesse brand. It integrates eight transceivers supporting data rates up to 1.25 Gb/s with a maximum operating voltage of 3.47 V. The device utilizes a 444-pin HSBGA package and supports SMD/SMT installation. Key interface protocols include JTAG, SerDes, SGMII, and SMI. Operating temperatures range from 0°C to +90°C. The component complies with RoHS standards and includes humidity sensitivity features.

Feature Summary

• Supports IEEE 802.3af Power over Ethernet (PoE) for inline powered devices
• Integrates VeriPHY cable diagnostics for automated testing and fault detection
• Includes ActiPHY power management with low power and wake-up states
• Provides automatic media-sense and crossover detection capabilities

Applications

• Ethernet switches requiring multiple twisted-pair ports
• Industrial networking equipment with high-temperature requirements
• Telecommunications infrastructure utilizing SerDes or SGMII uplinks
• Power-over-Ethernet enabled network hubs

Procurement Notes

Verify the manufacturer designation as Vitesse Semiconductor Corporation within official datasheets, noting subsequent corporate acquisitions. Confirm the specific ordering suffix 'XHJ' matches the required package type and environmental specifications. Ensure compatibility with the 444-HSBGA footprint during procurement planning.

Selection Notes

Select this component when an octal PHY configuration is necessary for space-constrained designs. Verify that the system requires dual 1.25 Gbps SerDes or SGMII connectivity for upstream links. Confirm that the operating environment falls within the specified commercial temperature range of 0°C to +90°C.

Part Context

This part belongs to the VSC8558 series, originally developed by Vitesse Semiconductor Corporation before its acquisition by Microchip Technology. The series represents a generation of high-density Ethernet PHYs designed for switch applications. The XHJ suffix typically denotes specific packaging and environmental variants within this product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult current Microchip Technology catalogs for updated components replacing legacy Vitesse products.