BCM5327MA1KQMG

Overview

The Broadcom BCM5327MA1KQMG is a highly integrated, low-cost managed eight-port 10/100 smart switch. It combines eight full-duplex 10BASE-T/100BASE-TX Fast Ethernet transceivers compliant with IEEE 802.3u, nine media access controllers (MACs) compliant with IEEE 802.x, and a 256-KB packet buffer into a single 0.18 µm CMOS device. The chip features a non-blocking switch fabric, port-based VLAN support, and 802.1p QoS priority queues. It includes an internal oscillator circuit and typical power consumption of less than 1.8W. Management capabilities include hardware support for SNMP, RMON, Spanning Tree, and the proprietary MIB Autocast function.

Feature Summary

• Integrates eight 10/100 PHY transceivers, MACs, and a 256-KB packet buffer in a single package
• Supports 802.1p QoS priority mapping and port-based VLAN segmentation
• Enables low-cost management via on-chip MIB registers and MIB Autocast functionality
• Includes auto-MDI/MDIX to automatically detect and correct crossover cable connections

Applications

• Cost-sensitive unmanaged or lightly managed 10/100 Ethernet switches
• Remote office, branch office, and home office network infrastructure
• IP phone applications requiring voice traffic prioritization
• Multimedia applications utilizing video traffic classification

Procurement Notes

Verify the specific ordering suffix against official Broadcom documentation to confirm exact temperature ranges, packaging variants, and RoHS compliance status. Ensure that any third-party datasheets match the original manufacturer's specifications precisely before finalizing procurement orders.

Selection Notes

Select this component when high silicon integration is required to minimize external discrete components. It is suitable for designs needing built-in QoS and VLAN features without a dedicated CPU. Consider the 208-pin PQFP package constraints and verify interface compatibility for uplink expansion using the MII or 7-wire interface.

Part Context

This device belongs to Broadcom's fourth-generation switch-on-a-chip family. It represents a significant evolution in Fast Ethernet switching technology by consolidating physical layer, data link layer, and switching fabric functions. This consolidation allows manufacturers to reduce PCB space and overall system costs while maintaining industry-standard interoperability.

Replacement Considerations

Check for other members within the BCM5327M series or broader BCM53xx family that may offer different pinouts or thermal ratings. Verify if newer generations provide enhanced management interfaces or lower power consumption profiles suitable for modern deployments.