Looking to enable higher-density line cards for central-office (CO) applications in the burgeoning DSL market, Conexant Systems Inc. has debuted the AccessRunner 9009, an eight-port ADSL chipset that integrates analog front ends (AFEs) and line drivers into a single device.
The chipset streamlines system designs to cut per-port system costs while reducing power requirements and analog crosstalk, according to the Newport Beach, Calif., company.
The AccessRunner 9009 chipset occupies a compact 1.3 sq. in. of board space per port, said Babak Nabili, senior product line manager at Conexant's ADSL central-office products.
"With a system-level focus to reduce cost and increase density, the chipset integrates many analog and digital components and eliminates the need for three out of four power supplies normally used for line drivers," Nabili said.
Conexant is one of only a handful of chip vendors that currently offer octal-port ADSL solutions, according to Kimberly Funasaki, an analyst at IDC in Mountain View, Calif.
"Conexant's [technology] is particularly noteworthy because it integrates each port's AFE and line driver into a single chip," Funasaki said. "Many of the [competing] solutions require a separate line driver for each port, or have not integrated the AFE and line driver."
The technology also expands Conexant's presence in the CO market-particularly the ADSL segment, where the company currently is not a leading contender, she said.
"Conexant really has been a [strong] player in the CO space, and this only confirms their continuing emphasis and development in this area," Funasaki said. "This solution gives them a solid position in the ADSL CO chipset market, which is growing strongly in terms of advanced build-out to ensure mass-market deployment."
The largest suppliers to the ADSL CO segment include Alcatel Microelectronics, Analog Devices, Lucent Technologies, and STMicroelectronics, according to IDC. The market was worth more than $168.2 million in 1999 and is slated to grow at a compounded annual rate of 61.9% through 2004, the market research firm said.
Conexant claims to maintain an 85% share of the symmetric-DSL market for business applications. Its major DSL customers include Copper Mountain, Efficient Networks, Lucent, Nokia, and Nortel.
The AccessRunner 9009 supports the full ADSL line rate of 8 Mbits/s, as well as the scaled-down 1.5- Mbit/s G.lite ADSL rate, and is designed for DSL access multiplexers (DSLAMs), digital loop carriers, and multitenant unit CO applications. A reference design provided by Conexant functions as a complete line card in a CO DSLAM, the company said. The chipset's line driver operates from a single 12-V power supply.
Standards supported by the chipset include ANSI T1.413 Issue 2, ITU G.992.1, and ITU G.992.2.
Samples of the AccessRunner 9009 chipset are available for less than $20, and volume production is scheduled for the first quarter of 2001.
The single-chip AFE and line driver is packaged in a 48-pin exposed thin-quad flatpack; the digital component and controller are packaged in a 17- ?? 17-mm chip-array BGA.