TI debuts dual-speed SerDes device for EPON OLTs
JUNE 4, 2008 -- Texas Instruments (TI) today introduced a low-power SerDes device that provides a fast relock time and supports a wide data bandwidth range from 1 to 2.6 Gbits/sec in point-to-point data transmission systems. The SerDes transceiver's independent transmit and receive channels allow asynchronous data rate operation, giving designers the flexibility to develop EPON (search for EPON) optical line terminals (search for OLT) that support 1.25 Gbits/sec, 2.5 Gbits/sec, or a mix of both.
"Texas Instruments' TLK2541 is an outstanding SerDes complement to the Teknovus TK3723 Turbo-EPON Optical Line Terminal MAC," contends Jerry Wojtowicz, director of hardware engineering at Teknovus (search for 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 provides very high-speed input/output data channels for baseband data transmission over controlled impedance media of approximately 50 ohms, says the company. The transmission media can be printed-circuit board, copper cable, or fiber-optic cable. The device offers low-power; with a 2.5-V power supply, it consuming less than 625 mW.
According to the company, other key features include the following:
• Fast relock at 1.25 Gbits/sec and 2.5 Gbits/sec for EPON OLTs;
• Industrial temperature range of -40 ° C to 85 ° C;
• Integrated 50-ohms termination resistors on RX;
• 2.5-V supply voltage for low-power operation;
• On-chip 8-bit/10-bit encoding/decoding; and
• Hot plug protection.
TI says the TLK2541 transceiver complements its existing family of SerDes devices for 1.25-Gbit/sec EPON units, including the TLK1211 and TLK1221 transceivers. Other serial gigabit transceivers from TI support Ethernet and general purpose communications applications. They contribute to TI's interface product offering, including families of products for M-LVDS, LVDS, CAN, RS-485, RS-232 and PCI-Express standards.
The TLK2541 is available now in an 80-pin TQFP package, priced at $12.50 in 100-unit quantities. In addition, samples are available online today.
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