Call Progress Tone Detector

MX643 - Preliminary Information

© 1996 MX•COM, INC.

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

Doc. #20480148.001

7

5.1 Decode Output Truth Table

DETECT3

DETECT2

DETECT1

CONDITIONS

0

0

0

No Signal

1

0

0

Special Information Tone: Will detect 950, 1400 and 1800Hz tones

0

0

1

Call Progress Low Band: Will detect 350+440, 400+450 and

440+480Hz tones, for example

1

0

1

Call Progress Low Band: Will detect single 400, 425, 440, and

450Hz tones, for example

0

1

1

Call Progress High Band:

Will detect 480+620Hz tones, for example

1

1

1

Call Progress High Band: Will detect single 600 and 620Hz tones, for

example

0

1

0

Non Call Progress signal, e.g. Voice Activity

1

1

0

Will detect a single tone lying outside the Call Progress Band and

within the Non Call Progress signal range

Decode Output Truth Table Notes:

DETECT1 responds to the complete range of call progress signals from 340Hz to 650Hz

DETECT2 responds to higher frequency call progress and voice or similar activity

DETECT3 responds to and indicates the presence of a single tone

6. Performance Specification

6.1 Electrical Performance

Absolute Maximum Ratings

Exceeding these maximum ratings can result in damage to the device.

General

Min.

Max.

Units

-0.3

7.0

V

-0.3

V

Current

-30

30

mA

-30

30

mA

Any other pin

-20

20

mA

P/DW Package

800

mW

Derating above 25°C

13

mW/°C above 25°C

Storage Temperature

-55

125

°C

Operating Temperature

-40

85

°C

Operating Limits

Correct operation of the device outside these limits is not implied.

Notes

Min.

Max.

Units

3.0

5.5

V

Xtal Frequency

3.57

3.59

MHz