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Dual-speed SerDes targets EPON terminals

Texas Instruments has expanded its WizardLink transceiver family with a low-power serialiser/deserialiser (SerDes) device that supports a data bandwidth of between 1 and 2.6 Gb/s in point-to-point data transmission systems.

This transceiver allows asynchronous data rate operation, giving designers the ability to develop Ethernet passive optical network (EPON) optical line terminals (OLT) that support 1.25 Gb/s, 2.5 Gb/s or a mix of both, making it easier to upgrade existing systems.

“Texas Instruments' TLK2541 is an outstanding SerDes complement to the
Teknovus TK3723 Turbo-EPONTM Optical Line Terminal MAC,” said Jerry
Wojtowicz, director of hardware engineering, Teknovus. “Together, they
enable the design and deployment of optical line terminals for cost-effective FTTx networks supporting internet, voice and HDTV triple-play services.”

The TLK2541, available in an 80 pin TQFP package, is said to provide high speed input/output data channels for baseband data transmission over controlled impedance media of approximately 50 ohms. Other features include fast relock functionality at both 1.25 and 2.5 Gb/s, an industrial temperature range and on-chip 8 bit/10 bit decoding.

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