as2525 austriamicrosystems, as2525 Datasheet - Page 21

• Manufacturer Part Number: as2525
• Description: Single Chip Handsfree Phone Cmos Integrated Circuit
• Manufacturer: austriamicrosystems

Datasheet AS2525
DTMF
LD Dialing
Revision 2.1
V
Symbol
Symbol
MF-RANGE
V
t
V
V
t
t
DF
t
V
t
t
t
PDP
t
t
IDP
UFC
ITP
TD
TR
TR
DR
M/
MF
/B
CT
L_H
Frequency Deviation
MF Tone Level at LS
(Low Group)
MF Tone Level Range at LS
(Low Group)
Pre-emphasis, Low to High
Unwanted Frequency
Components
Tone Duration, Minimum
Inter Tone Pause, Min.
Tone Rise Time
Tone Fall Time
Comfort Tone Level, RO
Dialing Rate
Break Period
Make Period
Pre-Digit Pause
Inter-Digit Pause
Parameter
Parameter
Deviation of ceramic resonator
is not included
Default
13 steps
300 Hz....4.3 kHz
4.3 kHz…7 kHz
7 kHz....10 kHz
10 kHz…14 kHz
14 kHz....28.5 kHz
28.5 kHz....40 kHz
Default
Default
From 10% to 90% amplitude
From 90% to 10% amplitude
Relative to LS, 4 steps
Default
Option
Default
Option
Option
Default
Option
Option
Conditions
Conditions
Min.
Min.
9.53
-4.5
800
2.0
80
80
57
38
-18/-6
Typ.
Typ.
82.3
82.3
61.2
40.8
16.5
-5.5
-36
-18
2.6
10
20
66
33
33
35
Max.
Max.
10.5
-6.5
880
1.2
3.2
-40
-46
-52
-58
-70
-80
85
85
63
42
5
5
Page 21 of 27
Units
Units
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
pps
pps
dBr
dBr
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
%