BCM8705BIFBG

Overview

The BCM8705BIFBG is a fully integrated serial 10-Gigabit Ethernet and Fibre Channel PHY transceiver featuring a WIS layer and XAUI interface. It supports PMD interface rates of 9.953, 10.3125, and 10.5188 Gbps with receive equalization on XAUI and 10G serial interfaces. The device includes transmit pre-emphasis, amplitude control, and phase threshold adjustments. It operates in LAN mode at 900 mW and WAN mode between 1.0W and 1.1W. The component is available in a 13-mm x 13-mm or 17-mm x 17-mm plastic BGA package.

Feature Summary

• Fully integrated CMU, CDR, SerDes, limiting amplifier, EyeOpener, and 4-lane XAUI interface
• Supports IEEE 802.3ae serial Ethernet (LAN/WAN PHY) and 10-Gigabit Fibre Channel draft rev 3.0 standards
• Includes WIS layer for EOS/WAN applications with SONET performance monitoring
• Compliant with XENPAK/X2 3.0 and XPAK MSA optical module standards

Applications

• XENPAK, X2, and XPAK modules
• Interface to XFP modules
• LAN/MAN/WAN switch/routers
• Network interface cards (NICs)

Procurement Notes

Verify the specific suffix 'I' against official Broadcom documentation to confirm temperature range and RoHS compliance status. Ensure the selected package variant matches the required PCB footprint dimensions. Confirm that the ordering information aligns with the manufacturer's current production lifecycle status before finalizing procurement plans.

Selection Notes

Select this component for designs requiring universal support for 10-GbE, SONET, and 10 GFC within XENPAK, X2, or XPAK modules. Consider the low power consumption of 900 mW in LAN mode for thermal management. Verify compatibility with StrataXGS Ethernet switches if service-aware flow control is required for the network architecture.

Part Context

This device serves as an upgrade path for existing Broadcom LAN PHY transceivers, offering an integrated design that reduces external components. It provides clean-up PLL capabilities and a 2.5V voltage regulator output. The pin-compatible nature with the BCM8704 facilitates easier migration for legacy system designs requiring enhanced feature sets.

Replacement Considerations

The BCM8704 is explicitly documented as pin-compatible with the BCM8705. Verify functional equivalence requirements before substituting, as the BCM8704 may lack specific features present in the BCM8705 such as the integrated WIS layer.