Microchip Technology VSC8572XKS-05

Overview

VSC8572XKS-05 from Microsemi (now Microchip) is a dual-port 10/100/1000BASE-T Ethernet PHY IC with integrated IEEE 1588v2 timestamping engine, Synchronous Ethernet support, and QSGMII/SGMII/RGMII MAC interfaces. It delivers sub-50 ns timestamp accuracy, supports Energy Efficient Ethernet (EEE), and operates across industrial temperature range (–40°C to +85°C) in carrier-grade timing applications.

For engineers reviewing the VSC8572XKS-05 datasheet, VSC8572XKS-05 pinout, VSC8572XKS-05 application, or VSC8572XKS-05 equivalent, this device is selected for IEEE 1588 boundary clock implementations, telecom transport equipment requiring precise packet delay measurement, and industrial Ethernet switches needing deterministic latency and media resilience.

Technical Context

The VSC8572XKS-05 implements a dual-port PHY with independent SerDes and copper media paths per port, supporting simultaneous QSGMII-to-1000BASE-X and RGMII-to-Cat5 operation. Its IEEE 1588 timestamping engine includes hardware-accelerated one-step and two-step transparent/boundary clock modes, local time counter with 8 ns resolution, and serial timestamp output interface.

It integrates ActiPHY power management for dynamic low-power states, VeriPHY cable diagnostics, ring resiliency for fiber redundancy, and full Clause 45 register access for EEE and 802.3bf PoE control. Reference clock inputs support both single-ended and differential 25 MHz/125 MHz configurations.

Key Specifications

Pinout & Package

The VSC8572XKS-05 is housed in a 256-pin, 17 mm × 17 mm, 0.8 mm pitch LFBGA package with exposed thermal pad. Pin assignment follows Microsemi's standard VSC8572 pinout layout, optimized for signal integrity and thermal dissipation in high-density switch designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Ethernet PHY applications.

Compared with Marvell 88E1512 and Intel I210-IT, the VSC8572XKS-05 uniquely integrates carrier-class timing (1588v2 + SyncE), dual-port flexibility, and hardware OAM acceleration-making it irreplaceable in metro edge and fronthaul timing units where timestamp accuracy, media resilience, and deterministic delay measurement are mandatory.

Availability

VSC8572XKS-05 is available at Aetrix Electronics and suitable for mobile fronthaul timing units, industrial TSN switches, and carrier Ethernet aggregation nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for VSC8572XKS-05 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microsemi - now part of Microchip Technology - specializes in high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets, with deep expertise in timing, security, and Ethernet infrastructure.

The VSC8572XKS-05 belongs to Microsemi's Carrier Ethernet PHY product line, engineered specifically for telecom transport equipment requiring IEEE 1588v2 precision, Synchronous Ethernet compliance, and robust media interface flexibility in harsh environments.

FAQ

What is the IEEE 1588 timestamp accuracy specification for the VSC8572XKS-05?

The VSC8572XKS-05 achieves ±40 ns typical timestamp accuracy under defined operating conditions, verified per IEEE 1588-2008 Annex D test methodology. This accuracy is enabled by its dedicated hardware timestamp engine, low-jitter recovered clocks, and calibrated internal delay paths - critical for meeting ITU-T G.8275.1 boundary clock requirements in mobile backhaul deployments.

Does the VSC8572XKS-05 support both QSGMII and RGMII simultaneously on the same port?

No, the VSC8572XKS-05 does not support QSGMII and RGMII simultaneously on the same port. Each port can be configured independently for either QSGMII/SGMII or RGMII via strap pins and register settings, but not both concurrently. The dual-port architecture allows one port to operate in QSGMII mode while the other uses RGMII, enabling heterogeneous MAC interfacing in multi-processor systems.

Can the VSC8572XKS-05 operate as a standalone IEEE 1588 boundary clock without an external CPU?

The VSC8572XKS-05 provides full hardware IEEE 1588v2 timestamping and clock correction logic, but requires an external microcontroller or host processor to run the PTP protocol stack (e.g., Linux PTP or commercial stack), manage message exchange, and configure registers. It cannot function as a fully autonomous boundary clock without host firmware - the VSC8572XKS-05 handles only the physical-layer timing functions.

What is the maximum cable length supported by the VSC8572XKS-05 on Cat5e UTP?

The VSC8572XKS-05 supports full 1000BASE-T operation over standard Cat5e UTP cabling up to 100 meters, compliant with IEEE 802.3ab. Its advanced DSP-based line driver and adaptive equalization maintain link integrity even with marginal cable quality, and VeriPHY diagnostics provide real-time cable health assessment including distance-to-fault for opens and shorts.

Is the VSC8572XKS-05 pin-compatible with earlier VSC8572 variants such as VSC8572XKS-02?

Yes, the VSC8572XKS-05 is pin-compatible with the VSC8572XKS-02 and shares identical package, pinout, and electrical interface specifications. Differences between variants are limited to internal firmware revisions and minor timing optimizations - no PCB redesign or layout changes are required when upgrading from VSC8572XKS-02 to VSC8572XKS-05 in existing designs.