Microchip Technology VSC8574XKS-05

Overview

VSC8574XKS-05 from Microsemi (now Microchip) is a quad-port 10/100/1000BASE-T Ethernet PHY IC with integrated IEEE 1588v2 timestamping engine, Synchronous Ethernet support, and QSGMII/SGMII MAC interface. It delivers full-duplex gigabit operation per port, supports Energy Efficient Ethernet (EEE), and enables precise time synchronization in carrier-grade networks.

For engineers reviewing the VSC8574XKS-05 datasheet, VSC8574XKS-05 pinout, VSC8574XKS-05 application, or VSC8574XKS-05 equivalent, key selection criteria include IEEE 1588 hardware timestamp accuracy (±2 ns), SGMII/QSGMII MAC interface compatibility, quad-port 1000BASE-T PHY functionality, and support for ring resiliency and VeriPHY cable diagnostics.

Technical Context

The VSC8574XKS-05 implements four independent 10/100/1000BASE-T PHYs with full autonegotiation, parallel detection, and automatic MDI/MDIX. Each port supports copper media over Cat5/5e/6 twisted-pair cabling with voltage-mode line drivers and integrated echo cancellation.

Its IEEE 1588v2 timestamping engine provides hardware-accelerated one-step and two-step transparent/boundary clock operation, with local time counter resolution of 8 ns and timestamp FIFO depth of 128 entries. The device also integrates Synchronous Ethernet (SyncE) recovery and distribution via multiple recovered clock outputs with configurable squelch and selection logic.

Key Specifications

Pinout & Package

Package: 256-pin FC-BGA (17 mm × 17 mm, 0.8 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-port 10/100/1000BASE-T PHY with IEEE 1588 applications.

Compared with Marvell 88E1512 and Microchip LAN8814, the VSC8574XKS-05 uniquely consolidates quad-port 1000BASE-T, hardware-accelerated IEEE 1588v2, SyncE clock recovery, and ring resiliency into a single BGA package-reducing component count, PCB area, and system-level timing complexity in carrier and industrial Ethernet systems.

Availability

VSC8574XKS-05 is available at Aetrix Electronics and suitable for mobile fronthaul units, carrier Ethernet aggregation switches, industrial time-sensitive networking nodes, and smart grid substation gateways requiring stable component supply and long-term lifecycle support.

Supply support for VSC8574XKS-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 Inc., designs high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets-with emphasis on timing, security, and Ethernet infrastructure.

The VSC8574XKS-05 belongs to Microsemi's Carrier Ethernet PHY product line, engineered specifically for telecom-grade synchronization, resiliency, and diagnostics in next-generation mobile backhaul and metro aggregation systems.

FAQ

What is the IEEE 1588 timestamp accuracy of the VSC8574XKS-05?

The VSC8574XKS-05 achieves ±2 ns hardware timestamp accuracy under defined operating conditions, verified per IEEE 1588v2 Annex D test methodology. This performance meets ITU-T G.8275.1 boundary clock specifications and enables sub-microsecond time distribution in carrier networks. The VSC8574XKS-05 uses dedicated timestamp FIFO and local time counter with 8 ns resolution to minimize software-induced jitter.

Does the VSC8574XKS-05 support Energy Efficient Ethernet (EEE)?

Yes, the VSC8574XKS-05 fully complies with IEEE 802.3az EEE, enabling low-power idle (LPI) mode during periods of low data activity. It supports both symmetric and asymmetric LPI entry/exit, with typical power reduction exceeding 50% per port while maintaining link integrity and fast wake-up response (<10 µs). The VSC8574XKS-05 implements EEE through its ActiPHY power management subsystem.

What MAC interfaces does the VSC8574XKS-05 support?

The VSC8574XKS-05 supports QSGMII and SGMII MAC interfaces, with four independent SerDes lanes (SGMII[0:3]) capable of aggregating all four PHY ports onto a single 4-lane QSGMII bus or operating as four discrete SGMII links. It does not support RGMII, MII, or GMII. The VSC8574XKS-05 requires external termination and AC coupling capacitors per lane per design guidelines in the VMDS-10510 datasheet.

Can the VSC8574XKS-05 operate in ring topology networks?

Yes, the VSC8574XKS-05 includes native ring resiliency support per ITU-T G.8032, implemented via fast link failure indication and status propagation across ports. It enables sub-50 ms protection switching in Ethernet ring topologies without requiring external switch fabric coordination. The VSC8574XKS-05 uses dedicated GPIO and register-controlled signaling to integrate with external ring manager ICs or FPGA-based control planes.

What diagnostic capabilities does the VSC8574XKS-05 provide for copper cabling?

The VSC8574XKS-05 integrates VeriPHY cable diagnostics-a TDR-based feature that detects opens, shorts, and impedance mismatches on Cat5/5e/6 cabling, and estimates fault distance up to 150 meters per port. Results are accessible via standard MMD registers and do not require external test equipment. The VSC8574XKS-05 performs diagnostics during link initialization or on-demand via register write, with results reported in millimeter resolution.