Microchip Technology VSC7444YIH-02

Overview

VSC7444YIH-02 from Microsemi (now Microchip) is a Layer 2/Layer 3 enterprise Gigabit Ethernet switch IC with integrated 10 Gbps SERDES, supporting up to 48x 1G + 4x 10G ports in configurable topologies. It delivers hardware-accelerated forwarding, precision time stamping per IEEE 1588-2008, and full Synchronous Ethernet (SyncE) compliance for telecom and industrial timing-critical networks.

For engineers reviewing the VSC7444YIH-02 datasheet, VSC7444YIH-02 pinout, VSC7444YIH-02 application, or VSC7444YIH-02 equivalent, key selection criteria include deterministic latency (< 1.2 µs L2 forwarding), PTP boundary clock capability with sub-50 ns timestamp resolution, and support for VLAN-aware bridging, ACL-based security, and hierarchical QoS scheduling across 10G uplinks and 1G access ports.

Technical Context

The VSC7444YIH-02 implements a multi-stage pipeline with VCAP™ content-aware classification (CLM, IS2, LPM), shared queue system with hierarchical scheduler, and dedicated Analyzer module for Layer 2/3 forwarding, learning, and statistics. Its architecture supports simultaneous IPv4/IPv6 routing, IGMP/MLD snooping, and hardware-based DSCP remarking and VLAN editing.

Timing subsystem integrates SyncE recovery (ITU-T G.8262 Class C), IEEE 1588-2008 PTP v2.1 with one-step and two-step timestamping, and hardware time-of-day generation with multiple PTP domains. The device uses SERDES1G, SERDES6G, and SERDES10G macros mapped to specific I/O pins per documented port numbering scheme.

Key Specifications

Pinout & Package

The VSC7444YIH-02 is housed in a 780-pin FC-BGA package (27 mm × 27 mm, 0.8 mm pitch) with thermal lid and exposed thermal pad. Pin assignment follows Microsemi's documented SERDES macro-to-I/O mapping for VSC7444-02 variants, including dedicated differential pairs for 1G/10G SERDES, management interfaces (I²C, SPI, MDIO), and CPU port signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Marvell 88E6393X and Intel FM10840, the VSC7444YIH-02 provides higher port density, integrated hardware timestamping, and autonomous timing subsystems-making it uniquely suitable for carrier, industrial, and utility applications demanding deterministic latency and traceable time synchronization without host dependency.

Availability

VSC7444YIH-02 is available at Aetrix Electronics and suitable for 5G fronthaul aggregation, industrial TSN networks, and carrier Ethernet access nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for VSC7444YIH-02 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., is a global leader in high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets.

The VSC7444YIH-02 belongs to Microsemi's VSC744x family of enterprise-grade Ethernet switches designed specifically for timing-critical infrastructure-emphasizing IEEE 1588 PTP, SyncE, low-latency forwarding, and carrier-class reliability in telecom and smart grid applications.

FAQ

What is the maximum number of 1G and 10G ports supported by the VSC7444YIH-02?

The VSC7444YIH-02 supports up to 48× 1G ports and 4× 10G ports in flexible configurations, enabled by its 40× SERDES1G and 4× SERDES10G transceivers. Port allocation is programmable via configuration registers and adheres to documented pin mappings in the VMDS-10498 datasheet revision 4.1. The VSC7444YIH-02 achieves full non-blocking 240 Gbps fabric capacity across this topology.

Does the VSC7444YIH-02 support IEEE 1588-2008 Precision Time Protocol?

Yes, the VSC7444YIH-02 fully supports IEEE 1588-2008 PTP v2.1 as both a boundary clock and transparent clock, with hardware timestamping on all physical ports. It delivers ≤40 ns timestamp resolution, multiple PTP time domains, and register-level control over delay measurement and correction-critical for 5G fronthaul and IEC 61850-9-3 substation timing. This capability is intrinsic to the VSC7444YIH-02 silicon and does not require external assist.

What package type and thermal characteristics does the VSC7444YIH-02 use?

The VSC7444YIH-02 uses a 780-pin Fine-Pitch Ball Grid Array (FC-BGA) package measuring 27 mm × 27 mm with 0.8 mm ball pitch and an integrated thermal lid. It features an exposed thermal pad on the underside for direct heatsink attachment. Thermal resistance (θ_JA) is 12.5°C/W under JEDEC JESD51-7 conditions, and junction temperature must be maintained below 105°C for continuous operation. This package is standard across the VSC744x-02 family, including the VSC7444YIH-02.

Can the VSC7444YIH-02 perform Layer 3 IP routing, and what protocols are supported?

Yes, the VSC7444YIH-02 performs hardware-accelerated Layer 3 IPv4 and IPv6 routing per RFC 1812 and RFC 2460, including static routing, ECMP, and longest-prefix match (LPM) lookups. It supports ARP/NDP resolution, ICMPv4/v6, and IGMP/MLD snooping. Routing tables hold up to 8,192 IPv4 and 4,096 IPv6 entries. All L3 functions are implemented in the VCAP LPM engine and operate at full line rate without CPU involvement-core to the VSC7444YIH-02's design.

How does the VSC7444YIH-02 handle Quality of Service and traffic prioritization?

The VSC7444YIH-02 implements a hierarchical QoS architecture with 8 egress queues per port, weighted round-robin (WRR) and strict priority (SP) scheduling, and per-flow policing via VCAP CLM. It supports IEEE 802.1p, DSCP remarking, and VLAN-based CoS mapping. Congestion control uses dynamic thresholding and weighted random early detection (WRED). These capabilities are embedded in the shared queue system and are fully configurable-defining how the VSC7444YIH-02 enforces service-level agreements in mixed-traffic environments.