The multiport CDR solves difficult high-speed signal integrity design challenges through the use of Vitesse’s VScope waveform viewing technology and FlexEQ Electronic Dispersion Compensation (EDC) and adaptive equalization technology. Supporting the widest array of data rates and protocols, the enhanced VSC8242 enables economical and efficient deployment of next-generation networking equipment for storage, blade servers, Carrier telecom, and datacom applications.
The CDR offers superior performance on a variety of physical media. For longer distances, the device extends optical transmission at 10G data rates on single mode fiber by over 50% and compensates for both chromatic- and polarization-mode dispersion for distances greater then 10 kilometers on exiting 2.5G networking infrastructure. For shorter optical distances, where high-density and lower system cost is paramount, the device enables a 10X speed upgrade on low-grade FDDI fiber from 1GE to 10GE for distances greater then 220 meters. The flexible equalization technology also enables deployment of low cost Twinax passive copper cables to distances greater than 15 meters for datacenter interconnect applications, a 100% improvement over the current standard.
“For high-density systems, new economics and simplicity in system debug and remote monitoring of system performance are required. The VSC8242 provides the features and performance necessary to meet these demands for 10G high-density SFP+ applications,” noted Raymond Fontayne, senior product marketing manager for Vitesse. “Several of the advanced diagnostics and remote monitoring features of the device are an excellent fit for our customers.”
By using VScope waveform viewing technology, the VSC8242 delivers an on-chip micro-oscilloscope capable of calculating rise-time, fall-time, and s-parameter extraction. The benefits of this technology can be far-reaching, including signal integrity visibility for system engineers, automatic link optimization, remote monitoring, along with improved manufacturing yield and reduced operational expenses for the end customer. The cost-competitive, low-power VSC8242 enables a self-adjusting mechanism to deal with discontinuities and signal quality variations.
The FlexEQ EDC and adaptive equalization technology in the VSC8242 can recover error-free data from what appears as a completely unintelligible signal waveform when viewed by conventional oscilloscopes. By combining the self-adjusting properties of FlexEQ with VScope, engineers are now able to attain both improved system performance and superior signal integrity analysis using a single integrated circuit.
Technical Highlights:
The VSC8242 has a sophisticated FFE-DFE architecture which compensates for loss of optical system performance or margin due to inter-symbol interference, chromatic-, and polarization-mode dispersion. The device is compliant to 10 Gbps SFP+ 10GBASE -SR, 10GBASE -LR, 10GBASE -LRM, SFF-8431 and 8.5G Fibre Channel FC-PI-4 specifications and is capable of independently running any channel at high-speed supporting data rates between 8.5 Gbps to11.3 Gbps. Additionally, the IC is able to autonomously speed negotiate to legacy data rates including 1GE and 1G, 2G, and 4G Fibre Channel.
On-chip user programmable equalization, output pre-emphasis and adjustable drive levels solves difficult signal integrity issues for board designers and allows 10G signals to be easily routed between SFP+ modules, processing circuits, and backplanes on low-cost printed circuit boards. Signals up to 11.3 Gbps can be transmitted over 40 inches of legacy backplane traces with multiple connectors in the path designed to support only 3 Gbps data rates.
Vitesse to Present and Demonstrate at Optical Fiber Conference (OFC) in San Diego:
Vitesse will showcase FlexEQ and VScope technologies at the OFC/NFOEC Expo, from March 23 to March 26, 2009, in San Diego, California, at the San Diego Convention Center.
