CMX683D4 CML Microcircuits

CMX683 CML Microcircuits Call Progress andVoic Detector COMMUNICATION SEMICONDUCTORS D/683/2 May 2006 Provisional Issue Features Applications Detects Single and Dual Call Progress Tones Worldwide Payphone Systems Worldwide Call Progress Tone Compatibility Telephone Redialling Systems Voic Detect Outputs (Fast and Slow) Dialling Modems Wide Dynamic Range with Low Falsing Banking and Billing Systems Low Power Operation: 600A at 3.0V typ. Telecom Test Equipment 3.58MHz Xtal/Clock Oscillator Telecom Security Systems 1. Brief Description The CMX683 is a general purpose Call Progress tone detector for use in monitoring the progress of calls in Public Switched Telephone System (PSTN) applications. Dial Tone, Ringing, Busy and Not Available states can be distinguished by using the host C to qualify the cadence of the CP DETECT output. The CMX683 uses advanced digital techniques to characterise valid Call Progress tones, unwanted tones, line noise and voice or music signals. In contrast to Call Progress detection devices based on simple filtering techniques, the CMX683 offers excellent sensitivity coupled with low false detection rates. The response time of the CMX683 allows it to operate with almost any Call Progress system. In particular the stuttered dial tone of voice mail messaging systems is supported. The use of statistical processing techniques, which analyse signal frequency, duration and amplitude, enable the CMX683 to distinguish voice or music activity from DTMF or Call Progress signals. Separate outputs integrate thevoic activity over both shorter and longer periods, enabling payphone and other billing systems to commence charging when a line connection has been established. A single 3.58MHz crystal ensures accurate and repeatable performance. With supply requirements between 2.7V and 5.5V and a low current consumption, the CMX683 can be easily integrated into a wide range of telecom equipments. The CMX683 has a similar pinout to all commonly used Call Progress detectors and is available in DIP, TSSOP or SOIC packages. 2006 CML Microsystems Plc Call Progress andVoic Detector CMX683 CONTENTS Section Page 1. Brief Description ..................................................................................... 1 2. Block Diagram......................................................................................... 3 3. Signal List................................................................................................4 4. External Components............................................................................. 5 5. General Description................................................................................ 6 5.1 Overall Function Description.................................................... 6 5.2 Glossary...................................................................................... 6 5.3 Block Diagram Description....................................................... 7 5.4 Decode Output Truth Table ...................................................... 7 6. Application Notes ................................................................................... 9 7. Performance Specification................................................................... 11 7.1 Electrical Performance............................................................ 11 7.2 Packaging ................................................................................. 14 2006 CML Microsystems Plc 2 D/683/2