BCM8705LBIFBG

Overview

The BCM8705LBIFBG is a fully integrated serial 10-Gigabit Ethernet/Fibre Channel transceiver with WIS layer and XAUI interface. It supports PMD interface rates of 9.953, 10.3125, and 10.5188 Gbps. The device integrates a CMU, CDR, SerDes, limiting amplifier, EyeOpener, and 4-lane XAUI interface. It operates within a commercial temperature range and consumes low power, specifically 900 mW in LAN mode and 1.0W to 1.1W in WAN mode. The component is available in a 13-mm x 13-mm plastic BGA package.

Feature Summary

• Fully integrated serialization/deserialization interface supporting 10-GbE, SONET, and 10 GFC standards
• Includes built-in clock multiplication unit (CMU), clock and data recovery (CDR), and EyeOpener technology
• Supports WIS layer for EOS/WAN applications with flexible clocking modes
• Compliant with XENPAK/X2 3.0 and XPAK MSA optical module standards

Applications

• XENPAK, X2, and XPAK modules
• LAN/MAN/WAN switch and router line cards
• Network interface cards (NICs)
• Hubs and repeaters

Procurement Notes

Verify the specific suffix LBIF against official Broadcom documentation to confirm package dimensions and RoHS compliance status. Ensure compatibility with the required reference clock frequency of 155.52/156.25/159.38 MHz. Confirm thermal management requirements align with the specified power consumption levels for your application environment.

Selection Notes

Select this component for high-density line card designs requiring universal support for 10-GbE, SONET, and Fibre Channel protocols. It serves as an upgrade path for existing Broadcom LAN PHY transceivers. Consider its pin-compatibility with the BCM8704 if migrating from previous generations. Verify that the system design accommodates the necessary external oscillator and optical module interfaces.

Part Context

This device belongs to Broadcom's 10-Gigabit Ethernet and Fibre Channel transceiver family. It is designed to perform extension functions for a 10-gigabit serial Ethernet reconciliation sublayer (RS) interface. The BCM8705 enables integration of XGXS, PCS, and PMA functions into a single compact solution, reducing the need for multiple discrete components in network infrastructure equipment.

Replacement Considerations

The datasheet confirms the BCM8705 is pin-compatible with the BCM8704. Designers upgrading from the BCM8704 can utilize this part without modifying the board layout. Verify that the specific functional requirements of the legacy design are met by the BCM8705's feature set.