The MX633 is a low cost, low power device that uses signal processing techniques to detect audible tone signals such as Dial, Ringing, Busy and other conditions found when placing a call throughout the world’s telecom systems. Detection of these call progress stages is essential to the proper operation of automatic calling products.

Features
• Worldwide Tone Compatibility
• Single and Dual Tones Detected
• U.S. Busy-Detect Output
• Voice-Detect Output
• Wide Dynamic Range > 40dBm
• Low Supply Current (0.3mA/0.5mA)
• Low Supply Voltage (3.3V/5.0V)
• Standard 3.58MHz Xtal

Applications
• Automatic Calling Products