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Modem Chipset Conserves Power and SpaceBy Susan Hospod For products requiring Internet connectivity, Texas Instruments and PCTEL introduced the lowest power and smallest V.90 embedded modem chipset for integration into devices with very small form factors at a low cost. This new two-chip solution cuts power consumption by as much as 90 percent and board space by up to 40 percent over existing solutions, enabling a new class of Internet access devices with smaller power and space requirements. This new two-chip solution, which consists of a power-efficient TMS320C54V90 DSP and PCTEL line-powered Data Access Arrangement (DAA), consumes only 25 mW of power when running a V.90 modem and requires as little as 1.5 square inches of board space. The C54V90 DSP incorporates PCTEL's modem control and data pump software, eliminating the need for off-chip memory, and integrates the digital portion of the DAA on-chip, thereby decreasing the conventional embedded modem solution from five or six chips to just two chips. The PCTEL line-powered DAA is used to interface to the telephone line and is compatible with local phone access in more than 65 countries. TI and PCTEL also plan to release a V.92 embedded modem chipset that will offer more symmetric data transmission speeds with higher upload bandwidth, faster handshaking time to achieve modem connection, and a modem on hold feature that allows the modem connection to be sustained when a phone call occurs on the same line. Samples of the C54V90 chipset are available today, with production scheduled to begin in 4Q01. Data sheets and product briefs describing the C54V90, as well as a development kit, are also available from TI. Links: |
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