BCM56273A1KFSBG

Overview

The BCM56273A1KFSBG is a high-performance Ethernet switch processor from Broadcom's Tomahawk family, designed for data center and enterprise core routing applications. It delivers a switching capacity of 12.8 Tbps with support for port speeds ranging from 1G to 400G. The device utilizes a 16nm process technology and features an FCBGA package. It includes 16MB of on-chip buffer memory with dynamic allocation capabilities to handle burst traffic effectively. The chip supports P4 programmability and FlexPort configurations, allowing flexible port speed assignments. It operates within a commercial temperature range of 0°C to 85°C.

Feature Summary

• Supports dynamic port configuration (FlexPort) enabling mixed rate ports from 1G to 400G on a single chip.
• Features P4 programmability for custom packet processing and forwarding logic implementation.
• Includes 16MB large buffer with dynamic allocation to mitigate congestion during traffic bursts.
• Compatible with major SDN controllers such as ONOS and ODL for open network integration.

Applications

• High-density data center spine and leaf switches requiring 400G uplinks.
• Enterprise core routers needing high throughput and low latency.
• Service provider edge devices supporting diverse port speeds.
• Cloud infrastructure networks demanding P4 programmability for customized traffic handling.

Procurement Notes

Verify the specific revision suffix 'A1' against the manufacturer's latest documentation to ensure compatibility with required firmware versions and errata sheets. Confirm that the FCBGA package pinout matches the target PCB design specifications. Check for any updated environmental compliance certifications required by the destination market before finalizing procurement orders.

Selection Notes

Select this component when a 12.8Tbps switching fabric is required alongside support for 400G interfaces. Consider its 16nm power efficiency compared to older generations if thermal management is a constraint. Ensure the system design accommodates the large BGA footprint and the necessary external memory components if additional buffering beyond the on-chip 16MB is needed for specific application profiles.

Part Context

This part belongs to the Broadcom Tomahawk series, which represents a generation of high-performance switching silicon. It sits between earlier 3.2T/6.4T class chips and newer 25.6T+ architectures. It is often used in platforms transitioning from 100G to 400G ecosystems, providing a balance of density and feature set for modern data centers.

Replacement Considerations

Direct pin-to-pin replacements are generally not available across different Tomahawk generations due to architectural changes. Potential alternatives include the BCM56472A0KFSBG or BCM56983B0KFSBG, but these require significant schematic and firmware redesigns. Verify functional equivalence carefully rather than assuming interchangeability.