VSC8258EV

Telecom Overview

The VSC8258EV is a quad-channel Ethernet PHY designed for high-performance serial-to-serial connectivity. It supports IEEE 1588v2 precision timing and 128/256-bit MACsec encryption. The device operates at data rates of 1.25 Gbps, 9.95 Gbps WAN, and 10.3 Gbps LAN. It features dual-sided 10GBASE-KR functionality with auto-negotiation and training. Power consumption is typically 1.4 W per bidirectional channel. Core power supplies are 1.2 V and 0.97 V, with a 2.5 V TTL supply.

Telecom Feature Summary

• VeriTime technology delivers industry-leading IEEE 1588v2 timing accuracy validated by major OEMs.
• Intellisec provides FIPS 197-certified 256-bit MACsec encryption supporting full line-rate speeds.
• Integrated adaptive equalization receiver and programmable transmitter pre-emphasis for signal integrity.
• Built-in self-test (BIST) functions including loopbacks and pattern generation for diagnostics.

Telecom Applications

• Multi-port XFI/KR to SFI/SFP+ 10 GbE switch cards and router cards
• 10GBASE-KR-compliant backplane transceivers
• Encryption and authentication across WAN data center interconnections
• Networks requiring high-accuracy time synchronization

Telecom Procurement Notes

Verify the specific suffix 'EV' against official Microsemi documentation to confirm it denotes an evaluation board or engineering sample variant rather than a standard production part number. Confirm package type and pinout compatibility before procurement. Ensure the source document explicitly defines the 'EV' designation to avoid ordering incorrect hardware revisions.

Telecom Selection Notes

Select this component for designs requiring integrated MACsec encryption and precise timestamping in a single PHY. It is suitable for applications needing 10GBASE-KR backplane support alongside SFP+/QSFP+ optical interfaces. Consider the typical 1.4 W power consumption per channel when designing thermal management solutions for dense board-level implementations.

Telecom Part Context

The VSC8258 belongs to Microsemi's family of high-speed Ethernet PHYs. Related products include the VSC8256 and VSC8257, which offer similar functionalities with potentially different port counts or feature sets. These devices are designed to provide intelligent Ethernet connectivity for switching, routing, and server access applications.

Telecom Replacement Considerations

Public confirmed substitute part numbers: VSC8256, VSC8257. Verify functional equivalence regarding MACsec support and timing accuracy before substitution.

Telecom FAQ

What timing standards does the VSC8258 support?

It supports IEEE 1588v2/Y.1731 OAM precision timing with VeriTime technology, delivering 4 ns accuracy.

Does the VSC8258 support synchronous Ethernet?

Yes, flexible clocking options enable Layer 1 support for Synchronous Ethernet (SyncE).

What encryption capabilities are included?

It includes Intellisec, providing FIPS 197-certified 256-bit MACsec encryption with legacy support for 128-bit deployments.