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Chipset suit IP telephony, modem, line monitoring apps

Posted: 10 Aug 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Integration? IA3222? IA3223? Silicon Direct Access Arrangement? DAA?

Integration Associates has released the IA3222 and IA3223 Silicon Direct Access Arrangement (Silicon DAA) chipset. The new chipset is voice and V.92 (56K) capable and is suitable for telephone line interface requirements and standards.

The device implements a high output transmit mode for voice applications and the company's patented IsoBridge isolation technology, which promises to eliminate the need for the usual telecom isolation components such as discrete capacitors, transformers or optocouplers. The IsoBridge technology can provide virtually unlimited high voltage isolation, the company said.

The integrated V.92 DAA offers an easy-to-use analog interface with an internal or external DC reference for interfacing to a variety of systems seamlessly. It allows easy "building-block" integration with standalone codecs or codecs integrated into DSPs such as FXO channels in VOIP equipment. It is also optimized for non-modem systems requiring isolated DAAs, such as alarm systems and Private Branch Exchange (PBX FXO) interfaces.

Worldwide compliance is provided through software programmability with a single hardware build. This includes the ability to program for additional AC line terminations, the company said, helping to improve line matching and consequently the performance of FXO channels in VOIP equipment.

The chipset also provides a rich set of line monitoring functions such as Caller ID, DTMF and continuous "line-in-use" monitoring. A programmable ring-detection threshold is also available along with pulse-dial spark quenching, line voltage and loop-current monitoring and line reversal detection both for on and off hook. The chipset's level of integration combined with a low pin count and BOM makes it a suitable replacement for first generation Silicon DAAs, Integration said.

The IA3222 & IA3223 EZ DAA chipset is priced under $1 in high volume. Samples are available in 10-pin MSOP package for the line side (IA3222) and 16-pin QSOP package for the modem side (IA3223).

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