DESCRIPTION

· The CMX683 is a general-purpose Call Progress tone detector for monitoring call progress in PSTN applications.

· It distinguishes Dial Tone, Ringing, Busy, and Not Available states using the host µC to qualify the CP DETECT output.

· Utilizes advanced digital techniques to characterize valid Call Progress tones, unwanted tones, line noise, and voice/music signals.

· Offers excellent sensitivity with low false detection rates and supports stuttered dial tones of voice mail systems.

· Integrates "voice" activity over short and long periods for billing systems.

· Operates with a single 3.58MHz crystal, ensuring accurate performance.

· Supply voltage ranges from 2.7V to 5.5V with low current consumption, suitable for various telecom equipment.

· Available in DIP, TSSOP, or SOIC packages with a pinout similar to commonly used Call Progress detectors.

FEATURES

· Detects Single and Dual Call Progress Tones.

· Worldwide Call Progress Tone Compatibility.

· "Voice" Detect Outputs (Fast and Slow).

· Wide Dynamic Range with Low Falsing.

· Low Power Operation: 600µA at 3.0V typical.

· 3.58MHz Xtal/Clock Oscillator.

APPLICATIONS

· Worldwide Payphone Systems.

· Telephone Redialling Systems.

· Dialling Modems.

· Banking and Billing Systems.

· Telecom Test Equipment.

· Telecom Security Systems.