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LSI Logic offers ADSL modem chipset

Posted: 14 Aug 2002 ?? ?Print Version ?Bookmark and Share

Keywords:lsi logic? modem chipset? adsl modem chipset? homebase ethernet adsl? l80225?

LSI Logic Corp. is moving into the standard-chips business for ADSL modems with the introduction of a three-piece chipset.

The HomeBase ADSL Ethernet chipset includes LSI Logic's standard L80225 Ethernet PHY device and an updated version of its SpeedReach analog front-end (AFE). The core of the chipset is the new AR900 processor, which combines an ARM9 core with a discrete-multitone (DMT) engine.

A chipset is appropriate because LSI Logic's customers cannot afford to make ADSL ASICs any more, said Kumar Sivakumar, senior director of the DSL business unit at LSI Logic.

ADSL modem prices have dropped sharply as volumes have increased, particularly after a glut of shipments in 2000. "Year 2000 was plainly freakish. That was when the industry shipped more modems than there were subscribers," Sivakumar said.

With ADSL becoming a standard-products realm, LSI Logic saw a chance to provide a complete modem chipset, said Sivakumar. The company already sold Ethernet PHYs and the SpeedReach AFE into the ADSL market.

It had experience with the other necessary pieces as well, having fabbed or designed ADSL ASICs for the likes of Globespan Inc. and Virata Corp., which merged in December to form GlobespanVirata Inc.

Those other pieces are merged into the AR900, which combines a 100MHz ARM9 CPU with an ATM segmentation-and-reassembly core, an Ethernet controller and a DMT engine. It is the AR900 that allows LSI Logic to offer a complete ADSL chipset for the first time, Sivakumar said.

In addition to the L80225 PHY and the AR900, HomeBase includes a new version of SpeedReach, the AR8202, optimized for the DMT engine in the AR900. The chipset is available now and is priced at $23 each in quantities of 10,000.

- Craig Matsumoto

EE Times

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