BCM84884B0KFEBG

Overview

The Broadcom BCM84884B0KFEBG is a quad-port Ethernet CMOS transceiver supporting 5GBASE-T, 2.5GBASE-T, 1000BASE-T, and 100BASE-TX standards over Category 5e, 6, or 6A twisted-pair cables. It integrates digital adaptive equalizers, ADCs, phase-locked loops, line drivers, echo cancelers, and crosstalk cancelers. The device provides USXGMII, XFI, 5000BASE-X, 2500BASE-X, and 1000BASE-X (SGMII) MAC interfaces with support for 5G and 2.5G rates. It features IEEE 1588-2008 PTP version 2 timestamping, Energy Efficient Ethernet (EEE), Enhanced Cable Diagnostics, and downshift capabilities. The component operates within an ambient temperature range of 0°C to 70°C and utilizes a 484-pin BGA package.

Feature Summary

• Integrates all physical-layer functions including digital adaptive equalizers, echo cancelers, and crosstalk cancelers for direct connection from MAC to magnetics.
• Supports comprehensive MAC interfaces including USXGMII, XFI, and SGMII with variable rate operation up to 5Gbps.
• Includes IEEE 1588-2008 PTP version 2 hardware timestamping for precise network synchronization.
• Features Energy Efficient Ethernet (EEE) with AutogrEEEn mode to reduce power consumption during low link utilization.

Applications

• Ethernet switch
• Ethernet server
• Fronthaul and backhaul of radio access network
• Industrial Ethernet

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the correct thermal solution and operating temperature range. The 'K' suffix indicates commercial temperature range without a heat spreader, while 'I' denotes industrial range. Ensure compatibility with the target system's voltage requirements and interface standards before procurement.

Selection Notes

Select this component when deploying high-speed Ethernet links over existing copper infrastructure requiring 5G or 2.5G speeds. Consider the BCM84884B0IFEBG variant if the application requires extended industrial temperature ranges. Verify that the host MAC supports the required USXGMII or XFI interface protocols for proper integration.

Part Context

This part belongs to the Broadcom BCM84884 family of quad-port Ethernet transceivers. Other variants in the series include the BCM84884B0IFEBG for industrial temperatures and versions equipped with heat spreaders (FSBG suffix). These components are designed to replace legacy PHY solutions by enabling higher data rates over standard Cat5e/6 cabling.

Replacement Considerations

Public confirmed substitute part numbers: BCM84884B0IFEBG, BCM84884B0KFSBG, BCM84884B0IFSBG.

FAQ

Does the BCM84884B0KFEBG support Power over Ethernet (PoE)?

No, the BCM84884 is a transceiver IC and does not integrate PoE functionality. A separate PoE controller or powered device circuit is required.

What is the maximum packet size supported by the BCM84884?

The device supports jumbo packets up to 18 KB.

How does the device handle cable length limitations?

It features a downshift capability that selects the highest available data rate on a given link within the cable plant based on signal quality.