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Product category: Communications ICs (Wired)
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TLK2208
Edited by the Electronicstalk Editorial Team on 24 December 2002

Transceiver cuts Gigabit
Ethernet power budget

Providing greater efficiency and scalability for high-speed backplanes, a new eight-port Gigabit Ethernet transceiver is claimed to reduce power consumption by 20% over comparable devices

Providing greater efficiency and scalability for high-speed backplanes, Texas Instruments has a new eight-port gigabit Ethernet transmitter-receiver it says reduces power consumption by 20% over comparable devices. Designed for flexibility, the new highly integrated transceiver provides an easy-to-use solution that promotes system cost savings of at least 30% over comparable devices in serial backplanes, switches and routers operating at Gigabit Ethernet speeds.

TI's new TLK2208 eight-port Gigabit Ethernet transceiver is based on a 0.18-micron CMOS manufacturing process that lowers power consumption to a maximum of 162mW per channel at 1.25Gbit/s.

By comparison, single-channel devices operating at this speed typically consume 200mW and require more than three times the space for the same number of channels.

As the lowest-power octal device available, the TLK2208 not only saves power in operation, but also creates less heat than competing solutions, permitting a greater concentration of channels in the same board space.

The eight full-duplex channels of the TLK2208, compliant with the IEEE802.3z Gigabit Ethernet specification, are synchronisable at speeds from 1.0 to 1.3Gbit/s.

The channels can be used with independent timing in either of two selectable parallel interface modes.

Based on reduced-pin double-datarate (DDR) timing, the dual-mode feature offers greater flexibility and ease of use for system designers such as the ability to interface to existing ASICs and FPGAs.

Also, the device's timing mechanism provides compatibility with both source-synchronous and source-centred ASICs.

On the serial output, the TLK2208 features programmable pre-emphasis to support transmissions over long distances without data loss.

Voltage-mode logic (VML) drivers on the serial side require no external capacitors or pull-down resistors, saving board space and lowering component counts while eliminating power consumption from external passive devices.

Selectable clock tolerance (CTC) allows easier synchronisation of clock and data, helping simplify design.

An integrated 8/10bit encoder/decoder with bypass also provides more flexibility to the board designer.

The TLK2208 is a drop-in replacement for comparable octal devices, simplifying layouts and allowing manufacturers to progress to a more efficient transceiver solution without significant hardware redesign.

'TI's leadership in CMOS process technology continues to enable greater integration and lower power consumption for high-speed backplane solutions', said Lori Schnier, serdes Product Marketing Manager, TI.

'With the TLK2208 Gigabit Ethernet transceiver, our customers can provide their customers with the low-power, high-density products they need using existing architectures'.

TI's TLK2208 eight-port Gigabit Ethernet transceiver and evaluation modules (EVMs) are available now.

The TLK2208 transceiver is packaged in a 289-pin ball grid array (BGA) with a 19 x 19mm footprint and a 1mm ball pitch.

Planned pricing is $30 per unit in quantities of 1000 units.

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