BCM53118KQLEG

Overview

The BCM53118KQLEG is a highly integrated, non-blocking 9-port 10/100/1000 switch silicon manufactured by Broadcom Limited. It integrates eight 10/100/1000BASE-T/TX Ethernet transceivers and one GMII/RGMII interface for an Inband Management Port (IMP). The device utilizes 65 nm LP CMOS technology with a 1.2V core and 3.3V I/O voltage. It features a 196-KB packet buffer, supports 4K MAC addresses, and provides 9 KB jumbo frame support. Typical power consumption is less than 3.9W.

Feature Summary

• Integrates LoopDTech for automatic loop detection without spanning tree protocol and CableChecker for live cable diagnostics.
• Supports IEEE 802.1Q-based VLAN with 4K entries, port-based VLAN, and VLAN double tagging (Q-in-Q).
• Provides four selectable QoS per port using SP and WRR algorithms based on port, MAC, or DSCP.
• Includes DoS prevention hardware, storm control, and IEEE 802.1x secure user authentication.

Applications

• Residential gateways and home office switches connecting voice, multimedia, and data devices.
• Branch office switch applications requiring cost-optimized board designs.
• Small to medium business (SMB) switches providing line-rate and non-blocking performance.

Procurement Notes

Verify the component status as End-of-Life (EOL) before procurement planning. Confirm that the specific ordering suffix KQLEG corresponds to the required package and environmental compliance specifications. Review the official discontinuance notification for transition timelines and availability constraints.

Selection Notes

Select this component when a single-chip solution combining PHYs and switching fabric is required. Ensure the design accommodates the 65 nm LP process and 1.2V core voltage. Verify compatibility with the CPU via the GMII/RGMII IMP interface if management integration is necessary.

Part Context

This part belongs to the BCM53118 family of gigabit switch silicon. It is based on the industry-leading BCM5398 architecture. The KQLEG designation identifies the specific package and material configuration within the broader product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the End-of-Life status, alternative sourcing requires verification of compatible cross-references from authorized distributors.