Call Progress Tone Detector
7
MX643 - Preliminary Information
5.1 Decode Output Truth Table
DETECT3
0
1
0
1
0
1
0
1
DETECT2
0
0
0
0
1
1
1
1
DETECT1
0
0
1
1
1
1
0
0
CONDITIONS
No Signal
Special Information Tone: Will detect 950, 1400 and 1800Hz tones
Call Progress Low Band: Will detect 350+440, 400+450 and
440+480Hz tones, for example
Call Progress Low Band: Will detect single 400, 425, 440, and
450Hz tones, for example
Call Progress High Band:
Will detect 480+620Hz tones, for example
Call Progress High Band: Will detect single 600 and 620Hz tones, for
example
Non Call Progress signal, e.g. Voice Activity
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
Supply (V
DD
- V
SS
)
Voltage on any pin to V
SS
Current
V
DD
V
SS
Any other pin
P/DW Package
Total Allowable Power Dissipation at T
AMB
= 25°C
Derating above 25°C
Storage Temperature
Operating Temperature
-55
-40
800
13
125
85
mW
mW/°C above 25°C
°C
°C
-30
-30
-20
30
30
20
mA
mA
mA
Min.
-0.3
-0.3
Max.
7.0
V
DD
+ 0.3
Units
V
V
Operating Limits
Correct operation of the device outside these limits is not implied.
Notes
Supply (V
DD
- V
SS
)
Xtal Frequency
Min.
3.0
3.57
Max.
5.5
3.59
Units
V
MHz
© 1996 MX•COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
CMLMICRO [ CML MICROCIRCUITS ]
