Vitesse's 10GbE LAN/WAN PHY enables compact SFP+-compliant transceiver

OCTOBER 2, 2009 -- The VSC8486-11 delivers high-speed signals for XFP and SFP+ module-based Carrier Ethernet equipment supporting 10GbE, 10GFC, and WIS (OC-192/STM-64) network applications.

OCTOBER 2, 2009 -- Vitesse Semiconductor Corp. has extended its offering of VSC8486 10-Gbps XAUI-to-XFI LAN/WAN transceivers with a highly integrated, next-generation device, the VSC8486-11. Featuring synchronous Ethernet clocking, the VSC8486-11 delivers high-speed signals for XFP and SFP+ module-based Carrier Ethernet equipment supporting 10-Gigabit Ethernet (10GbE), 10G Fibre Channel (10GFC), and WIS (OC-192/STM-64) network applications. The single 1.2-V supply and low power of the VSC8486-11 transceiver make it appropriate for single, dual, and high-density line card applications.

In response to high-speed traffic growth, the VSC8486-11 has been specifically designed to fit in a 144-pin chip-scale package (FCBGA), allowing Vitesse to support customer requirements for aggressive price points when designing for today's 10GbE market.

"The VSC8486-11 capabilities, dimensions, and competitive cost make it the perfect solution for evolving metro Ethernet networks, enterprise networks, campus environments, and central office connectivity," says Koby Reshef, vice president of marketing, PacketLight Networks. "Collaborating with Vitesse and using the VSC8486-11 transceiver has made our suite of WDM solutions even more robust, providing customers with a distinguished solution that meets the emerging needs of metro Ethernet, triple play, and enterprise data sharing applications."

Unlike other devices with high-power electronic dispersion compensation, the VSC8486-11 uses Vitesse's low-power enhanced FlexEQ architecture with circuitry that compensates for connector and channel losses. This allows the device to be compliant with INF-8077i XFP and SFF-8431 SFP+ module specifications. The architecture also provides fast lock times and low latency required for Carrier Ethernet networks. In LAN mode, the device meets and exceeds the Ethernet IEEE 802.3ae and Fibre Channel T11 10 GFC standards. Additionally, the device is fully compliant with the SONET jitter specification defined by Bellcore GR253 in WAN mode. The VSC8486-11 has a typical power dissipation of 750 mW in the LAN mode and 850 mW in the WAN mode.

Part of the VSC8486 family, the new device with synchronous Ethernet clocking can be used with either XFP or SFP+ optical modules, making it suitable for Carrier Ethernet line card applications. To simplify circuit card layout, the XAUI lanes can be swapped or inverted. The XAUI interface includes pre-emphasis for the transmitter, equalization for the received signal, and de-skew logic to compensate for propagation-delay differences. It extracts the clock and the data and performs physical-coding sub-layer (PCS) functions such as 8b/10b coding and 64b/66b coding. Along with a WIS layer for WAN applications, forward error correction (FEC) is available for greater reach over fiber distances.

"With numerous design wins, Vitesse has shipped the VSC8486 product family to a variety of customers worldwide and we continue to see increasing demand for our widely adopted physical layer products in the marketplace," says Raymond Fontayne, senior product marketing manager for Vitesse.

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