BCM5328MA1KQMG

Overview

The Broadcom BCM5328M is a highly integrated, fourth-generation eight-port 10/100 Ethernet switch device fabricated in 0.18 µm CMOS technology. It combines eight full-duplex Fast Ethernet transceivers compliant with IEEE 802.3u, nine media access controllers supporting IEEE 802.x MAC control PAUSE frames, and a 256-KB on-chip packet buffer into a single unit. The device features a non-blocking switch fabric capable of cascading up to three devices through a 2.6-Gbps expansion port. It supports auto-negotiation, automatic address learning for up to 4K MAC addresses, and hardware-based Spanning Tree, SNMP, and RMON management. Typical power consumption is less than 1.8W, and it is housed in a 208-pin PQFP package.

Feature Summary

• Integrates eight 10BASE-T/100BASE-TX transceivers, MACs, and a 256-KB packet buffer within a single chip.
• Supports flexible MII or 7-wire interfaces for additional uplink connections or fiber extensions.
• Enables low-cost network management via proprietary MIB Autocast function without requiring a CPU.
• Provides hardware support for QoS priority queues, VLANs, and standard network monitoring protocols.

Applications

• Cost-sensitive unmanaged switches requiring plug-and-play connectivity.
• Smart managed switches utilizing low-cost microcontrollers for statistics collection.
• Remote office, branch office, and home office networking environments.
• Applications requiring IP phone voice traffic prioritization and multimedia video traffic handling.

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm pinout compatibility and package type. Ensure that any assumed functional differences based solely on suffix variations are validated by the manufacturer's datasheet before implementation.

Selection Notes

Select this component when designing systems requiring high silicon integration for eight-port Fast Ethernet switching. Consider its suitability for applications where minimizing external components and reducing overall system cost are primary design constraints.

Part Context

This device represents the fourth generation of Broadcom's switch-on-a-chip architecture. It builds upon previous generations by integrating advanced management features like MIB Autocast while maintaining compliance with industry-standard Ethernet specifications for broad interoperability.

Replacement Considerations

Public confirmed substitute part numbers: BCM5328MA1KPBG