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參數(shù)資料
| 型號： | IN2418N |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Telephone Tone Ringer with Bridge Diode |
| 中文描述： | 電話鈴聲鈴聲與橋二極管 |
| 文件頁數(shù)： | 3/3頁 |
| 文件大?。?/td> | 152K |
| 代理商： | IN2418N |
IN2418
3
AC CHARACTERISTICS
Symbol
Parameter
Test Conditions
Guaranteed Limits
Unit
Min
Typ
Max
f
H1
f
H2
Output Frequencies
f
H1
f
H2
V
CC
= 26 V, R1 = 14 K
V
CC
= 0 V
V
CC
= 6 V
R1 = 27 K
to 1.7 K
R
1
= 14 K
, C
1
= 100 nF
2300
1700
Hz
Hz
f
H1
Range
0.1
15
KHz
f
L
Sweep Frequency
10
Hz
TEST AND APPLICATION CIRCUIT
f
1
= 3.22
10
4
/ R
1
(K
); f
2
= 5/7 f
1
; f
sweep
= 1000 / C
1
(nF)
DESCRIPTION
The IN2418 tone ringer derives its power supply by rectifying the AC ringing signal. It uses this power to
activate two tone generators. The two tone frequencies generated are switched by internal oscillator in a fast
sequence and made audible across an output amplifier in the loudspeaker; both tone frequencies and the
switching frequency can be externally adjusted.
The device can drive either directly a piezo ceramic converter (buzzer) or small loudspeaker. In case of
using a loud-speaker, a transformer is needed.
An internal shunt voltage regulator provides DC voltage to the output stage, low frequency oscillator, and
high frequency oscillator. To protect the IC from telephone line transients, a zener Diode is included.
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