as2578 austriamicrosystems, as2578 Datasheet - Page 20

• Manufacturer Part Number: as2578
• Description: Telephone Controller With 13 Memories And 2-wire Bus
• Manufacturer: austriamicrosystems

Data Sheet
Note 1: The values are valid during automatic dialling and are minimum values during manual dialling, i.e. the tones will
Note 2: The rise time is the time from 10% of final value till the tone amplitude has reached 90 % of its final value.
Note 3: Relative to high group.
Note 4: The FCI circuit is reset by POR and on-hook. After a reset the FCI circuit is in a standby state. A positive edge on FCI
Rev. 3
AC Characteristics Cont´d
Symbol
V
THD
t
t
t
t
t
t
t
t
t
t
t
t
V
t
F1
F2
F3
t
t
f
f
TD
ITP
TR
TF
DR
M/B
IDP
MO
FD
GLS
GLL
AP
MD
DT
TO
MIN
MAX
V
MF
MO
L-H
continue as long as the key is depressed.
will start the 73 ms timer and the frequency discrimination is initiated. Whenever a period of the ring frequency is
missing, the timer is reset. When a valid ring signal is present for
directly controlled by a valid signal from the FCI circuit. This condition will remain until a new reset.
Parameter
DTMF
MF Tone Level
Preemphasis Low to High
Distortion (0.3 - 4 kHz)
Tone Duration
Inter Tone Pause
Tone Rise Time
Tone Fall Time
LD
Dial Rate
Make/Break Period
Inter Digit Pause
Mute Overhang
Flash Duration
Ground Loop, Short
Ground Loop, Long
Automatic Pause
Melody
Melody Output
Melody Delay
Detection Time
Detection Time-out
Min. Detection Frequency
Max. Detection Frequency
Frequency 1
Frequency 2
Frequency 3
Conditions
High group, R
R
R
Note 1
Note 1
Note 2
Note 2
R key
R key > 540 ms
5%
5%, MODE = low
5%, MODE = high
L
L
= 15 k
= 15 k , note 3
540 ms
L
20
= 15 k
73 ms, the melody generator is started and is
-12.3
1200
1025
1280
800
100
495
770
Min
2.0
2.9
19
58
80
80
80
40.8/61.2
note 4
33/66
-10.8
1250
PDM
1067
1333
82.3
82.3
Typ
840
500
800
2.4
3.0
10
20
59
t
M
1300
1110
1385
Max
-9.3
880
102
505
830
2.8
-23
3.1
85
85
10
85
21
60
5
5
AS2578 /B
March 1997
Units
dBm
dBr
pps
sec
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
dB
Hz
Hz
Hz
Hz
Hz