Telecoms, Datacoms, Wireless, IoT


Next generation phone line interface IC has voice optimisation

10 September 2002 Telecoms, Datacoms, Wireless, IoT

Clare's LITELINK III (CPC5620 and CPC5621) silicon phone line interface (PLI)/data access arrangement (DAA) is designed to enhance voice telephony performance. The LITELINK III is the first commercially available phone line interface IC designed specifically for both voice and high-speed data applications in the computer telephony market, claims Clare.

A single-package, all-silicon solution, it contains a unique on-chip optical isolation barrier which gives designers the ability to build telephone line interface circuits without bulky transformers. This allows them to simplify their design, gain greater channel density and lower the overall component count and development cost. LITELINK III is a superior solution to traditional transformer-based telephone line interfaces and competitive silicon DAA solutions with higher parts counts and PCB space requirements.

The CPC5620 (half-wave ring detect) and CPC5621 (full-wave ring detect) feature 3 V or 5 V operation, providing for an easy connection to high performance SLAC, CODEC and modem chipsets offered by leading OEMs. Because LITELINK III does not have complex set-up registers, it does not require the use of a controller for evaluation, testing and use.

Clare's distinctive design uses a new method of factory gain trim, eliminating the need for an on-board automatic gain control circuit and its attendant settling time. Other features of the design ensure low noise and low insertion loss, helping designers meet EIA/TIA 464 specifications for system loss. A mode pin has been added to simplify reactive termination applications such as in Europe and Australia.

LITELINK III is also backward compatible with Clare's previous LITELINK II solution - requiring only a change of 4 external resistors and the addition of a capacitor.

For more information contact Laetitia Prinsloo, Arrow Altech Distribution, 011 923 9600.



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