SC9106 Datasheet, PDF (3/5 Pages) List of Unclassifed Manufacturers – TONE RINGER SC9106

Silicore
TEST CIRCUIT
_
A
1
8
2
7
6.8K
SC 9106
3
165K ^+_ 1%
4
6 _{191K +_1%}
5
+
S1 _S2
SC9106
APPLICATION CIRCUIT
C1 ^R1
TIP _0.9uF 560
4
2
RING
D1
C4
22uF/35V
1
RSL
2
3
R2
165K+_1% ⁴
C2
0.47uF+_5%
C5
8
0.22uF
7
SC9106 _{191k_+1%}
6
R3
C3
6.9nF+_5%
5
10K
SP
1300:8
APPLICATION NOTE
The application circuit illustrates the use of the UTC9106 device in typical
telephone tone ringer application.
The AC ringer signal voltage appears across the TIP and RING inputs of the
circuit and is attenuated by capacitor C1 and resistor R1.
C1 also provides isolation from DC voltage (48V) on the exchanged line.
After full wave rectification by the bridge diode, the waveform is filtered by
capacitor C4 to provide a DC supply for the tone ringer chip.
As this voltage exceeds the initiation voltage (Vsi), oscillation starts.
SHAOXING SILICORE TECHNOLOGY CO.,LTD
3/5
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CHMC