BCM56975B0KFSBG

Overview

The BCM56975B0KFSBG is a high-performance Ethernet switch ASIC from Broadcom Limited, designed for advanced data center and telecommunications infrastructure. It belongs to the StrataXGS family, offering scalable switching capacity with integrated SerDes interfaces supporting multiple port speeds including 25G, 40G, 50G, and 100G Ethernet. The component utilizes a large-scale FBGA package suitable for dense PCB layouts. Key internal features include hardware-accelerated packet processing, support for network virtualization protocols such as VXLAN and NVGRE, and programmable forwarding pipelines. It is engineered to deliver low latency and high throughput for leaf-spine architectures and top-of-rack deployments.

Feature Summary

• Hardware-accelerated support for overlay tunneling protocols including VXLAN, NVGRE, and MPLS for cloud network virtualization.
• Integrated flexible port configuration allowing mixed-speed operation across 25G, 40G, 50G, and 100G Ethernet standards.
• Programmable pipeline architecture enabling custom match-action logic and support for OpenFlow and P4 programming models.

Applications

• Data center leaf and spine switch platforms requiring high-density 100G uplinks.
• Top-of-rack (ToR) switches connecting 25G or 40G server blades.
• Telecommunications backhaul aggregation nodes in carrier networks.
• High-performance computing clusters utilizing RDMA over Converged Ethernet (RoCE).

Procurement Notes

Verify the specific silicon revision and manufacturing date code against project requirements before integration. Confirm RoHS compliance status and REACH registration details with the authorized distributor. Ensure that the ordering suffix matches the exact pinout and thermal specifications required by the PCB design. Request official datasheets and errata sheets to validate signal integrity parameters for high-speed SerDes traces.

Selection Notes

Select this component when designing systems requiring native support for 25G and 100G Ethernet ports within a single ASIC footprint. Evaluate the thermal dissipation capabilities of the large FBGA package against the system's cooling infrastructure. Compare the available buffer memory and hashing algorithms against expected traffic patterns to prevent congestion. Ensure the host CPU has sufficient bandwidth to manage the control plane operations via standard management interfaces.

Part Context

This part number represents a specific packaging and environmental variant of the broader BCM56975 series. The suffix indicates the use of lead-free materials compliant with international environmental directives. It shares the core architectural foundation with other members of the Tomahawk generation, ensuring software compatibility through common SDKs while differing in physical interface and thermal characteristics.

Replacement Considerations

Direct pin-to-pin replacements are generally not available due to the proprietary nature of switch ASIC architectures. Consider next-generation Broadcom StrataXGS models for improved performance per watt. Validate any alternative components against the existing board layout constraints and firmware compatibility requirements.