Exar Delivers Industry’s Highest Density SONET/SDH 40G Framer

October 20, 2009

FREMONT, Calif., Oct. 20 /PRNewswire-FirstCall/ — Exar Corporation (Nasdaq: EXAR) today expanded its Tethys(TM) product with the introduction of Tethys II devices, the industry’s highest density SONET/SDH Framers comprised of the PEB2756 and PEB2757 which deliver 40G of bandwidth in a single device. The new Tethys II devices provide a flexible feature set that can be coupled with Optical Transport Network (OTN) devices to enable next-generation line cards for optical networking. The new devices offer OEMs a solution for developing cost-effective products that increase line card port count and capacity while decreasing per-port cost and power.

The Tethys II devices are single-chip solutions that integrate functions previously requiring several components, including aggregation of up to 16 channels of traffic, serializing/deserializing, pointer processing, clock and data recovery, as well as transport overhead (TOH) and path overhead (POH) processing. The PEB2756 supports four OC-192/STM-64 channels. The PEB2757 supports four OC-192/STM-64, sixteen OC-48/STM-1, sixteen OC-12/STM-4, or sixteen OC-3/STM-1 channels, which can be mixed in any combination. Both devices support aggregate throughput up to 40 Gbps while meeting the most stringent SONET/SDH jitter requirements.

“The Tethys II devices provide our customers with a key component for emerging high density 10 Gbps line card solutions,” said John Williams, division vice president, Datacom and Storage, Exar. “Combining Tethys II with Exar’s MXP2 OTN framer also provides an ideal solution for next-generation hybrid packet/TDM network equipment.”

About the Tethys II Family

The Tethys II family provides unsurpassed flexibility allowing ports to be independently configured for different data rates, permitting “any port, any rate” implementations and by providing a direct interface to optical modules. This allows equipment to be programmed in the field by simply changing the optical modules, enabling service providers to purchase one card for use in multiple applications, substantially reducing maintenance costs, in-service upgrades and inventory.

The on-chip SERDES, clock and data recovery (CDR) and clock multiplier unit support 2.5 Gbps, 622 Mbps and 155 Mbps multi-rate I/O which connect directly to multi-rate SFP optics. The line-side interfaces for the Tethys II devices include programmable serial SERDES ports as well as the SFI-4.1 and SFI-4.2 interfaces required for the OC-192/STM-64 mode and connection to 10Gbps OTN / FEC devices. The system-side interface for both devices supports TFI-5.


The new Tethys II devices are offered in a 1400-pin BGA package. Samples of both the PEB2757 and PEB2756 will be available in the 4th quarter of this year, with volume production planned for first quarter of 2010. For more information on the PEB2757AE visit : http://www.exar.com/Common/Content/ProductDetails.aspx?ID=9924&ParentID=3, and for the PEB2756AE – http://www.exar.com/Common/Content/ProductDetails.aspx?ID=9922&ParentID=3.

About Exar

Exar Corporation delivers highly differentiated silicon, software and subsystem solutions for industrial, datacom and storage applications. For nearly 40 years, Exar’s comprehensive knowledge of end-user markets along with the underlying analog, mixed signal and digital technology has enabled innovative solutions that meet the needs of the evolving connected world. Exar’s product portfolio includes power management and interface components, communications products, storage optimization solutions, network security and applied service processors. Exar has locations worldwide providing real-time customer support to drive rapid product development. For more information about Exar, visit: http://www.exar.com.

SOURCE Exar Corporation

Source: newswire

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