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參數(shù)資料
| 型號(hào)： | AS2574BN |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 20 NUMBER ONE TOUCH DIALLER WITH SERIAL BUS FOR DISPLAY DRIVER |
| 中文描述： | TELEPHONE DIALER CKT, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 22/24頁 |
| 文件大?。?/td> | 191K |
| 代理商： | AS2574BN |
Data Sheet
AS2574B
Rev. 1
22
Jan. 1995
Parameter
Symbol
Min
Typ
Max
Unit
Condition
Clock Startup Time
Ts
5
ms
Key Debounce Time
HS Debounce Time
CD Reset Delay Time
Td
Ths
Tr
14
21
18
26
ms
ms
sec
2
DTMF
Tone Level, High Group
Preemphasis
Distortion
Tone Duration
Inter Tone Pause
Tone Rise/Fall Time
LD
Dial Rate
Make/Break Period
(diode option)
Inter Digit Pause
Pre Digit Pause
Post Digit Pause
Flash
Duration
Vol
- 12.4
2
- 10.9
2.5
- 9.4
2.8
- 26
85
85
5
dBm
dBm
dBr
ms
ms
ms
RL = 15 k
RL = 15 k
RL = 15 k
, note 3
Note 1
Note 1
Note 2
Ttd
Titp
Ttr
80
80
82.3
82.3
10
pps
ms
ms
ms
ms
ms
±
5%
±
5%
±
5%
Tm/Tb
33/66
40/60
Tidp
Tpre
Tpo
753
55
55
785
57
57
Tfd
100
600
101.2
103
620
ms
ms
No diode 2
With diode 2
Earth Recall
Duration
Tg
500
510
ms
Automatic Access Pause
Short
Long
Termination
Mute Overhang
MR/MT Hold Over
Tone Burst
Frequency
Output Level
Tone Duration
Inter Tone Pause (LS)
Inter Tone Pause (Mute)
Tap
4
4.1
8
1.2
200
4.2
8.1
1.25
223
27
sec
sec
sec
ms
ms
DT = Hi-Z
DT = Low
DT = High
7.9
1.15
182
18
Tmo
Tho
Fb
Vtb
Ttb
Titb1
Titp2
700
-13
80
7
1.8
800
-9
85
9
2.2
Hz
dBm
ms
sec
sec
-11
8
2
Time-out
Tto
7.7
8
8.2
sec
Signalling Characteristics
Defaults conditions: Recommended Operating Range
Note 1: The values are valid during automatic dialling and are minimum values during manual dialling, i.e. the tones will continue
as long as the key is depressed.
Note 2: The rise time is the time from valid key detection (key has been debounced) till the tone amplitude has reached 90 % of its
final value.
Note 3: Relative to high group.
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