Vitesse Delivers Second Generation Electronic Dispersion Compensation ICs For 10 GbE Fiber Applications
Camarillo, CA - Vitesse Semiconductor Corporation recently announced the release of its next-generation Dual Clock and Data Recovery (CDR) integrated circuits with integrated Electronic Dispersion Compensation (EDC), the VSC8240 and VSC8242.
Devices offering EDC are essential to enabling 10 GbE implementations across multiple applications in Enterprise, Metro and Core networks including those using SFP+ optical interconnects, XFP optical interconnects, 10G NICs, 10G copper interconnects, and 10G copper backplanes.
These new, low-power, EDC devices evolve from Vitesse's first-generation EDC technology, the VSC8238, which is the solution of choice for optical module suppliers of 10GBASE-LRM in the X2 form factor. X2 is the dominant optical module for 10 GbE shipments today. The 10GBASE-LRM standard, enabled by the VSC8238, has allowed deployment of 10 GbE solutions with low-cost legacy multi-mode fiber in Enterprise networks.
"Vitesse EDC technology has been accepted as the gold standard in the industry and has been attributed to enabling the quick ramp-up of 10GBASE-LRM deployment," said Tony Conoscenti, vice president, product marketing for Vitesse. "Vitesse has shipped 50,000 ports of VSC8238 for 10 GbE applications. Now, we have moved our EDC technology into lower power CMOS. This new product doubles the integration and reduces power consumption by 50 percent. It will substantially reduce the cost of deployment of 10 GbE across the optical Enterprise and Metro service transport networks."
Enabling SFP+ Applications
10 GbE port shipments are anticipated to top the one million mark in 2009, according to the latest edition of Light Reading's Components Insider. Lower cost, lower power and higher port densities are driving SFP+ to become the predominant optical module format of these new platforms. The lead application for the VSC8242 is enabling the migration of datacom and telecom routers and switches to the SFP+ optical module form factor. Three SFP+ reach applications have been standardized for 10 GbE networks: 10GBASE-SR, -LR and -LRM. The VSC8242 supports all three applications and has compliance with IEEE standards: 802.3aq, 802.3ae, and SFF-8431 electrical specifications. This functionality allows existing module designs to quickly, seamlessly and cost-effectively migrate to the SFP+ form factor.
The VSC8242 incorporates two bi-directional 10 Gbps paths to support the increased port densities. Additional features of the VSC8242 include various lookbacks, a complete set of programmable Rx and Tx path functionality, such as output pre-emphasis, and full 1 GbE data rate support. Packaged in a small 12mm by 12mm flip-chip CSP package, the VSC8242 has an integrated microcontroller to enable auto adaptation of dispersed optical signals. Typical power dissipation is only 750mW for each bi-direction channel.
Successful interoperability testing of the VSC8242 with SFP+ optical modules from leading vendors has provided the broadest collection of real life system application data available in the industry with coverage for all three applications: SR, LR, and LRM. Fully autonomous convergence code has been released to Vitesse's Enterprise customers and module partners.
A single channel variant, the VSC8240, is also available in an 8mm by 8mm flip-chip CSP package. The VSC8240 has all of the functionality of the VSC8242, but is targeted at XFP CDR applications and other single receive path applications such as single mode fiber reach extension applications in metro and long haul transport systems. The VSC8240 compensates for both SMF chromatic dispersion (up to 2400ps/nm) and polarization–mode dispersion (over 70ps differential-group delay) in a poor OSNR environment and will enable the adoption of 120Km, 160Km, and longer applications.
Vitesse's market-leading EDC technology is part of a complete line of physical layer and switching products covering 10 GbE and SONET/SDH applications for Carrier Ethernet and optical transport networks.
SOURCE: Vitesse Semiconductor Corporation