BCM53158XUB1KFBG

Overview

The BCM53158XUB1KFBG is a commercial-grade, intelligent managed Gigabit Ethernet switch from the Broadcom Robo II family. It integrates eight 10/100/1000Base-T ports with built-in GPHYs, one QSGMII port, and two 10GE XFI/SFI high-speed uplink ports. The device utilizes a 28 nm architecture featuring an integrated ARM Cortex-M7 CPU for standalone processing without external controllers. It supports advanced Layer 2 features including VLAN manipulation, hierarchical QoS, and Time Sensitive Networking (TSN). Designed for SMB, industrial, and service provider applications, it operates within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrates an ARM Cortex-M7 processor enabling standalone platform design without external CPUs.
• Supports cascading mode to create unified, single-CPU managed switches with expanded port counts.
• Features advanced Compact Filter Processor (CFP) for L1-L4 header classification and access-list engine capabilities.
• Includes sophisticated VLAN translation, encapsulation, and Port-Extender support per 802.1BR.

Applications

• High-end SMB and enterprise web-managed or fully managed switches
• Industrial Ethernet networks requiring robust switching performance
• Service provider home gateways and MDU (Multi-Dwelling Unit) switches
• Modular chassis devices utilizing 802.1BR port extender functionality

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package dimensions and temperature grade. Ensure compatibility with required software packages such as RoboSwitch SDK or Net- Switch SDK for managed functionalities. Confirm lead times and availability through authorized distributors as supply chain conditions vary.

Selection Notes

Select this model when eight copper ports combined with dual 10GE uplinks are required. Choose over BCM53156 or BCM53157 variants specifically for the inclusion of the QSGMII interface alongside the 10GE ports. Consider the large package option if industrial temperature ratings (-40°C to +85°C) are necessary for the deployment environment.

Part Context

This component belongs to the Broadcom BCM53156/53157/53158 series, which shares the underlying Robo II architecture. While the BCM53156 offers one uplink and the BCM53157 offers two uplinks without QSGMII, the BCM53158 uniquely combines dual 10GE ports with a QSGMII interface. All models in this family share similar forwarding mechanisms and CPU integration.

Replacement Considerations

BCM53158XMA0KFBG serves as a direct functional substitute within the same package and temperature grade but may differ in pre-loaded software configuration. For industrial temperature requirements, the BCM53158XMA0ILFBG variant provides equivalent switching capabilities with extended thermal tolerance.

FAQ

Does the BCM53158XUB1KFBG require an external processor?

No, the chip integrates an ARM Cortex-M7 CPU, allowing it to function as a standalone platform without adding an external processor.

What uplink interfaces are available on this switch?

The device includes two high-speed 10GE XFI/SFI ports and one QSGMII port for additional connectivity options.

Is Time Sensitive Networking supported?

Yes, the switch supports advanced TSN protocols, including 802.1AS, to enable scheduled traffic transmission across network domains.