The circuit was designed to provide a monitoring scheme for a telephone line where several phones are installed, to indicate when one is being used. 4N25 – a general purpose optocoupler that consists ...
Beverly, Mass. — Clare, Inc., a wholly owned subsidiary of IXYS Corp., has introduced the CPC5712, a special-purpose phone line monitor with detectors (PLMD) IC, aimed at high-voltage telephony ...
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