DATA BULLETIN

© 1997 MX

•COM Inc.

www.mxcom.com Tele: 800 638-5577 910 744-5050

Fax: 910 744-5054

Doc. # 20480135.003

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

PRELIMINARY INFORMATION

Features

Applications

• 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

• Automatic Calling Products

DETECT2

DETECT1

SLICER

SIGIN

XTAL/

CLOCK

SIGNAL

ANALYZER

CONTROL

LOGIC

XTAL / CLOCK

OSCILLATOR

XTAL

ENABLE

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.

The MX633 adds new features to Call Progress monitoring. It detects and indicates the ‘U.S. Busy’ tones, reducing the

need to measure ‘tone cadence’ to identify ‘U.S. Busy’. It also detects and indicates voice and other signals from Call

Progress tones, reducing voice-falsing and adding voice-answer as a connection prompt.

The MX633 may be used with a 3.0V to a 5.5V supply and is available in the following package styles: 8-pin PDIP

(MX633P) and 16-pin SOIC (MX633DW).