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DATA BULLETIN

Document #20480148.001 May 1996

Preliminary Information

鈥?/div>

International Special Information Tone Identification

Worldwide Tone Compatibility

鈥?/div>

- 40擄C to 85擄C Operating Temp

擄

Single and Dual Tone Detected

鈥?/div>

Low Supply Current (0.3mA/0.5mA)

U.S. Busy-Detect Output

鈥?/div>

Low Supply Voltage (3.3V/5.0V)

Voice-Detect Output

鈥?/div>

Standard 3.58MHz Clock Input

Wide Dynamic Range > 40dBm

鈥?/div>

Standard 8-pin DIP Package

鈥?/div>

CLOCK /

XTAL

VDD

AVAILABLE

PACKAGES

CLOCK

XTAL

VSS

ENABLE

DETECT1

MX643P

8-pin PDIP

SIGIN

SLICER

SIGNAL

ANALYZER

CONTROL

LOGIC

DETECT2

DETECT3

MX643DW

16-pin SOIC

The MX643 is a low power, low cost device that uses signal processing techniques to detect audible tone signals

such as; Dial, Ring, Busy, Unobtainable, and other conditions found when placing a call throughout the world鈥檚

telecom systems. The detection of these Call Progress stages is essential to the proper operation and application

of automatic calling products.

The MX643 offers identification of International Special Information Tones (SIT), reducing the time needed for

cadence verification under Obtainable conditions. In addition to the SIT feature, single and dual tone decoding

are added for better cross-system Call Progress monitoring. The MX643 offers these features in addition to the

same performance levels and features of the MX633 Call Progress Tone Detector such as; detection and

identification of U.S. Busy tones, thereby reducing the need to measure the tone cadence to identify U.S. Busy.

The decoding and indicating of speech, or other Non-Call Progress signals, thus reducing voice-falsing of Call

Progress tones and adding Voice-Answer as a connect prompt.

Available in the industry standard 8-pin DIP, the MX643 is also available in a 16-pin SOIC making it pin

compatible with the MX633DW (16-pin SOIC).

漏 1996 MX鈥OM, INC.

Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054

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