VSC9803

Overview

The VSC9803 is a high-performance, non-blocking 10/100/1000 Ethernet switch fabric chip designed for advanced networking applications. It features eight Gigabit Ethernet ports with integrated MACs and PHYs, supporting full-duplex operation at line rate on all ports simultaneously. The device includes a built-in hardware-based QoS engine, traffic shaping capabilities, and support for IEEE 802.1p priority tagging. It operates within a commercial temperature range of 0°C to 70°C and requires a 3.3V power supply. The architecture ensures low latency packet switching with a backplane bandwidth sufficient to handle wire-speed forwarding across all interfaces without blocking.

Feature Summary

• Integrated eight-port Gigabit Ethernet switching fabric with embedded MAC and PHY layers
• Hardware-accelerated Quality of Service (QoS) engine supporting traffic prioritization and shaping
• Non-blocking architecture enabling simultaneous full-duplex data transmission on all ports

Applications

• High-density enterprise network switches
• Industrial automation control systems requiring deterministic latency
• Telecommunications base station aggregation equipment

Procurement Notes

Verify the specific package variant and manufacturing date code against current Microsemi or Microchip availability lists. Confirm RoHS compliance status and lead times directly with authorized distributors, as production schedules for legacy silicon may vary. Ensure proper ESD handling protocols are followed during procurement and storage.

Selection Notes

Select this component when an application demands a compact, multi-port Gigabit solution with integrated physical layer transceivers. It is suitable for designs where board space is limited and external PHY components must be eliminated. Consider thermal management requirements given the dense pin count and power dissipation characteristics inherent to multi-port Gigabit switching fabrics.

Part Context

This component belongs to the VersaSwitch family of Ethernet switching solutions developed by Microsemi, now part of Microchip Technology. These devices were engineered to provide scalable switching capabilities for infrastructure equipment. The VSC9803 specifically targets the mid-range market segment requiring robust Layer 2 switching performance in a single-chip form factor.

Replacement Considerations

Consult Microchip's official cross-reference documentation for direct replacements. Potential alternatives include newer generations from the same VersaSwitch family or competitive offerings from vendors such as Broadcom or Marvell that offer similar port counts and integrated PHY architectures.