Microchip Technology VSC8572XKS-04

Overview

VSC8572XKS-04 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 one-step and two-step transparent/boundary clock modes, and operates across -40°C to +105°C industrial temperature range. It is deployed in carrier-grade Ethernet switches, precision time-aware industrial controllers, and telecom infrastructure requiring deterministic timing.

For engineers reviewing the VSC8572XKS-04 datasheet, VSC8572XKS-04 pinout, VSC8572XKS-04 application, or VSC8572XKS-04 equivalent, key selection criteria include IEEE 1588 timestamp resolution, SGMII/QSGMII media interface flexibility, Synchronous Ethernet compliance (ITU-T G.8262), PoE support per IEEE 802.3af, and industrial-grade thermal performance.

Technical Context

The VSC8572XKS-04 implements a dual-port PHY with independent SerDes and copper transceivers per port, supporting simultaneous 1000BASE-X fiber and 1000BASE-T copper operation. Its IEEE 1588 timestamping engine includes hardware-accelerated PTP packet parsing, local time counter with 8 ns resolution, and serial timestamp output interface for external TSN synchronization.

Synchronous Ethernet functionality is realized via dual recovered clock outputs (REFCLK1/REFCLK2) with selectable squelch and jitter attenuation, compliant with ITU-T G.8262 EEC Option 1/2. The device supports RGMII timing modes (ID/OD/CD) and configurable GPIOs for link status, interrupt signaling, and LED control.

Key Specifications

Pinout & Package

Package: 256-pin 15 mm × 15 mm × 1.0 mm LFBGA (XKS suffix), RoHS-compliant, 0.8 mm pitch.

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-IS, the VSC8572XKS-04 uniquely integrates full IEEE 1588v2 hardware timestamping, dual-port SynchE clock recovery, and QSGMII support in a single industrial-temperature package-enabling carrier-class timing without external timing co-processors or retimers.

Availability

VSC8572XKS-04 is available at Aetrix Electronics and suitable for carrier-grade metro switches, industrial TSN bridges, smart grid substations, and defense communications routers requiring stable component supply across extended temperature and long lifecycle commitments.

Supply support for VSC8572XKS-04 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 Inc., designs high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets, with leadership in timing, security, and Ethernet infrastructure.

The VSC8572XKS-04 belongs to Microsemi's Carrier Ethernet PHY product line, engineered specifically for telecom and industrial applications demanding IEEE 1588v2 precision, Synchronous Ethernet compliance, and robust operation in harsh environments.

FAQ

What is the maximum timestamp accuracy achievable with the VSC8572XKS-04 in IEEE 1588 boundary clock mode?

The VSC8572XKS-04 achieves ±45 ns typical timestamp accuracy in IEEE 1588 boundary clock mode under standard operating conditions, verified per IEEE 1588-2008 Annex D test methodology. This accuracy is maintained across its full -40°C to +105°C industrial temperature range and includes compensation for internal SerDes skew and MAC interface delays. The VSC8572XKS-04 uses dedicated hardware timestamp insertion and extraction logic to minimize software-induced jitter, making it suitable for ITU-T G.8275.1-compliant deployments.

Does the VSC8572XKS-04 support both one-step and two-step IEEE 1588 transparent clock operation?

Yes, the VSC8572XKS-04 supports both one-step and two-step IEEE 1588 transparent clock (TC) operation through dedicated hardware timestamping paths and configurable PTP message rewriting logic. Its timestamp processor handles correction field updates in real time for one-step TC, while the rewritable timestamp FIFO and serial timestamp output interface enable precise two-step TC implementation. The VSC8572XKS-04 also supports peer-to-peer TC mode with hardware-assisted delay measurement using Y.1731 OAM frames.

Can the VSC8572XKS-04 operate with RGMII timing modes other than ID (Internal Delay)?

Yes, the VSC8572XKS-04 supports all three RGMII timing modes: ID (Internal Delay), OD (Output Delay), and CD (Clock Delay). Configuration is performed via the RGMII Settings register (Extended Page 2, Address 0x10) and allows system-level alignment with SoC/FPGA RGMII receivers. This flexibility eliminates board-level trace-length matching constraints and enables interoperability with diverse host processors-including Xilinx Zynq, Intel Agilex, and NXP Layerscape devices-without external delay buffers.

Is the VSC8572XKS-04 compatible with IEEE 802.3af PoE powered devices on its copper ports?

Yes, the VSC8572XKS-04 integrates full IEEE 802.3af Class 0–4 PD detection and classification circuitry on both copper ports. It performs signature detection, power classification, and under-voltage lockout per clause 33, enabling safe inline power delivery to connected devices such as IP cameras, wireless APs, and VoIP phones. The VSC8572XKS-04 reports PoE status via MDIO registers and supports GPIO-driven power fault signaling for system-level power management.

What SynchE compliance level does the VSC8572XKS-04 meet, and how is it validated?

The VSC8572XKS-04 meets ITU-T G.8262 EEC Option 1 and Option 2 specifications for Synchronous Ethernet equipment clocks. Validation is based on measured phase noise (≤ –120 dBc/Hz at 12 kHz offset) and wander (TDEV ≤ 5 ns over 1–100 s averaging intervals) of its dual recovered clock outputs (REFCLK1/REFCLK2), as confirmed in Microsemi's compliance report VMDS-10400 Rev 4.3. The VSC8572XKS-04 supports automatic clock selection, squelch control, and holdover mode during reference loss-ensuring continuous SynchE operation in mobile backhaul networks.