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All-DSP dual 10GbE PHY devices move to 65nm

Posted: 26 Mar 2009     Print Version  Bookmark and Share

Keywords:high-speed DSP  10GbE PHY  SFP+  serial transceivers 

Broadcom Corp. has introduced two new low power, dual 10 Gigabit Ethernet (10GbE) PHY devices that leverage Broadcom's DSP technology.

The new devices are touted as the industry's first 65nm CMOS all-DSP 10GbE serial transceivers that enable IT professionals to preserve existing fibre infrastructures by providing a low cost upgrade path from 1GbE to 10GbE. Broadcom's high-speed DSP technology provides significant performance, manufacturing and reliability advantages over competing analogue solutions that will drive the transition to 10GbE by leveraging the cost effective SFP+ standard, says the company.

Broadcom targets the high density SFP+ market with its new BCM8727 dual 10GbE SFI-to-XAUI PHY and BCM8750 dual 10GbE SFI-to-XFI PHY solutions. Both solutions exceed the requirements of the IEEE 802.3aq standard, which was developed to provide a low cost 10x speed upgrade for existing Gigabit Ethernet links in multi-mode fibre applications.

By utilising a PHY based entirely on DSP architecture, enterprise data centres can now achieve higher bandwidth and performance, while maintaining significant savings in cost, resources and manpower when upgrading to 10GbE links.

The Broadcom BCM8727 dual 10GbE SFI-to-XAUI PHY and the BCM8750 dual 10GbE SFI-to-XFI PHY build upon six generations of field proven 10GbE serial PHY technology. Both implement Broadcom's electronic dispersion compensation (EDC) equaliser technology that uses an all-DSP design, resulting in maximum flexibility with the highest performance, exceeding the IEEE 10GBASE-LRM Pre, Post, and Split Symmetric Stressors and up to 15 meters of low-cost direct attached copper SFP+.

An on-chip micro-controller provides additional flexibility to maintain optimal performance in even the most challenging operating conditions.

In support of the SFP+ optical module standard, the devices incorporate multi-tap transmit pre-emphasis to compensate for FR-4 board material loss in line card applications. For additional flexibility, they support backward compatibility using existing 1GbE SFP modules, providing a single PHY design that is capable of interfacing to both new and legacy Ethernet interfaces from a single PCB design.

The BCM8727 and BCM8750 10GbE PHYs are currently sampling to customers. The BCM8727 is available in a 19mm x 19mm, BGA, RoHS-compliant package while the BCM8750 is available in a 12mm x 12mm, BGA, RoHS-compliant package.





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