News and New Products

DAA helps caller ID accomplish foreign exchange

By Bill Schweber -- EDN, 3/31/2005

Using the CPC5622A Litelink from Ixys subsidiary Clare, designers of telephone-related products gain access to features that are compatible with international-telephony and FXO (foreign-exchange-office) specifications. The IC provides the DAA (data-access-arrangement) interface for modem speeds as high as V.92 standards specify, as well as voice support, with simultaneous ringing detection and CID (caller-ID) monitoring. Both full- and half-wave ring detection provides flexibility, and transmission power can be as high as 10 dBm into 600Ω. The device provides 3-kV rms isolation through on-chip optical components.

According to Steve Andrezyk, Clare’s director of marketing, the virtues of the line-powered, 32-pin IC are universality and size. “The additional control features to handle country-specific CID and ringing requirements help OEMs reduce costs and board-space real estate,” he says. The 3.3 to 5V device needs only a few external components and supports ac- and dc-line terminations, switch-hook detection, a two- and four-wire-hybrid function, and full-time on-hook transmission ability. The CPC5622A sells for $2.41 (10,000).

Clare Inc, 1-978-524-6700, www.clare.com.