BCM5324MKPB

Overview

The BCM5324M is a single-chip L2+ managed switch integrating twenty-four 10/100 PHYs and two Gigabit media access controllers. It utilizes a non-blocking switch fabric with 3 Mb of shared packet buffer and control memory. The device supports up to 8K MAC addresses, 4K VLAN entries, and 256 multicast addresses. It features four Class of Service (CoS) priority queues per port for traffic management. The chip includes an internal oscillator, embedded 2.5V and 1.2V regulators, and typical power consumption of 3.5W. It is housed in a 400-pin PBGA package.

Feature Summary

• Integrates twenty-four full-duplex Fast Ethernet transceivers with Advanced Cable Diagnostics technology for cable fault detection and length measurement.
• Supports Layer 2 and Layer 3 IGMP snooping, IEEE 802.1Q VLAN segmentation, and multiple Spanning Tree protocols including Rapid STP.
• Provides hardware support for SNMP and RMON via over 70 MIB counters for comprehensive per-port receive and transmit statistics.
• Enables advanced network security through 802.1X EAPOL protocol filtering, MAC address locking, and programmable storm control.

Applications

• Multitenant/multidweller unit (MDU/MTU) market deployments
• Small-to-medium business (SMB) managed switch designs
• Delay-sensitive video and audio multicast applications

Procurement Notes

Verify the specific ordering suffix against official Broadcom documentation to confirm package type and temperature range. Ensure compatibility with the required CPU interface, such as SPI or MDC/MDIO, for system integration. Confirm that the 400-pin PBGA footprint matches the target PCB layout constraints.

Selection Notes

Select this component when a high level of integration is required to replace traditional multi-chip solutions. It is suitable for designs needing extensive L2+ management features within a compact form factor. Consider the low-power characteristics and internal oscillators for simplified PCB design requirements.

Part Context

This device belongs to the ROBOSwitch family based on seventh-generation technology. It represents a significant increase in integration by combining all switch functions into a single 0.13 μm CMOS device. The BCM5324M serves as a foundational component for cost-effective managed switches compared to previous generations.

Replacement Considerations

The BCM5322M offers similar functionality but replaces the Gigabit interfaces with MII interfaces. Other family members include the BCM5321M with sixteen Fast Ethernet ports and the BCM5320M with eight Fast Ethernet ports.