BCM82328B1KFSBG

Overview

The BCM82328B1KFSBG is a Lite-PHY dual-port 40 Gigabit Ethernet transceiver manufactured by Broadcom Limited. It integrates two independent 40GbE PHY channels within a single package, designed for high-density network infrastructure applications. The device supports standard 40GBASE-CR4 and 40GBASE-SR4 interfaces, enabling direct connectivity to copper cables or optical modules without external retimers. Key features include integrated clock data recovery (CDR) and low power consumption relative to industry standards for this speed class. The component is RoHS compliant and operates within specified industrial temperature ranges.

Feature Summary

• Dual-channel architecture providing two independent 40GbE physical layer interfaces in a compact form factor.
• Integrated clock data recovery (CDR) circuitry eliminates the need for external CDR components.
• Supports both copper (CR4) and optical (SR4) media types through standardized interface protocols.
• Optimized power efficiency suitable for dense switching and routing equipment.

Applications

• High-speed data center switches requiring 40G uplink ports.
• Enterprise core routers with multi-gigabit aggregation capabilities.
• Telecommunications infrastructure equipment supporting 40GbE transport networks.

Procurement Notes

Verify the specific suffix KFSBG against the manufacturer's current datasheet to confirm pinout compatibility and thermal specifications. Ensure that the ordering documentation matches the exact part number, as minor variations in suffixes may indicate different packaging or temperature grades. Confirm RoHS3 compliance status if required by regional regulations. Cross-reference the manufacturer's official lifecycle status to ensure long-term availability for production planning.

Selection Notes

Select this component when designing systems requiring dual 40GbE ports with minimal external component count. Evaluate PCB layout constraints regarding high-speed signal integrity for differential pairs. Compare power dissipation requirements against available thermal management solutions on the target board. Consider the integration of CDR functionality to simplify the bill of materials compared to solutions requiring external retimers.

Part Context

This part belongs to Broadcom's Lite-PHY family, which focuses on reducing system complexity and cost for high-speed networking. The BCM82328 series is distinct from lower-speed PHYs like the BCM54xx series or higher-end MAC-integrated switches. It serves as a dedicated physical layer transceiver rather than a switch fabric controller.

Replacement Considerations

Check for direct cross-references from Broadcom's official obsolescence notices. No public substitute part numbers are confirmed in available documentation. Verify compatibility with existing reference designs before considering alternative vendors.