PEX9749-AA80BI G

Analog Switches - Special Purpose Overview

The Broadcom PEX9749-AA80BI G is a managed PCI Express switch based on ExpressFabric technology, designed for high-performance data center fabrics. It features 49 lanes and 13 ports with integrated on-chip SerDes supporting PCIe Gen 3 (8.0 GT/s). The device offers cut-through packet latency of less than 150ns and supports up to 2KB Max Payload Size. It includes a dedicated management port for an off-chip mCPU, enabling software-defined fabric configuration via API or CLI. The component operates within a commercial temperature range of 0°C to +70°C.

Analog Switches - Special Purpose Feature Summary

• Supports shared I/O using standard SR-IOV and multifunction capability for concurrent host assignment
• Enables low-latency host-to-host communication through Tunneled Window Connection (TWC)
• Provides virtual Ethernet NIC functionality at each host port for transparent DMA tunneling
• Includes Downstream Port Containment (DPC/eDPC) for robust error recovery

Analog Switches - Special Purpose Applications

• High-Performance Computing (HPC) clusters requiring low latency and high bandwidth
• Hyper-converged infrastructure systems demanding flexible I/O sharing
• NVMe storage networks optimizing throughput and reducing protocol bridging costs

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix against official documentation, as variations may indicate differences in package type or environmental ratings. Confirm availability status directly with authorized distributors, as this component may be subject to discontinuation or limited supply constraints. Ensure compliance with RoHS directives and check for any relevant Product Change Notifications prior to procurement.

Analog Switches - Special Purpose Selection Notes

Select this model for applications requiring a balance between port density and power efficiency compared to larger series members. Verify that the system design accommodates the required 27x27 mm2 package size and thermal dissipation needs. Ensure the platform supports the necessary external management CPU interface for initialization and routing table configuration.

Analog Switches - Special Purpose Part Context

This component belongs to the Broadcom PEX9700 series, which utilizes ExpressFabric technology to create scalable, cost-effective PCIe fabrics. The series ranges from 12 to 97 lanes, offering flexibility in topology design. The PEX9749 variant specifically targets mid-range hyperscale deployments needing significant lane count without the footprint of the largest switches.

Analog Switches - Special Purpose Replacement Considerations

Direct replacements within the same family include the PEX9733-AA80BI G for lower lane counts or the PEX9765-AA80BC G for higher capacity. Verify pin compatibility and firmware support when substituting, as package sizes and thermal characteristics differ across the series.