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TA31002_07 Datasheet, PDF (6/6 Pages) Unisonic Technologies – TELEPHONE TONE RINGER
TA31002
APPLICATION CIRCUIT
TIP
1 µF/250V 2KȤ
104B42
RING
C4
+
15È°F/35V -
fL=1/1.234R1*C1
fH1=1/1.515R2*C2
fH2=1.24fH1
when:
R1=165KΩ
R2=191KΩ
C1=0.47µF/16V C2=0.0068µF/16V
fL≅10Hz
fH1≅500Hz
fH2≅630Hz
LINEAR INTEGRATED CIRCUIT
1
8
RSL
2
7
UTC
TA 31002
3
6
R1
4
5
0.22È°F
61Ȥ
R2
C2
SP
C1
15kȤ
1300:8Ȥ 
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.

UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 6
QW-R108-004.B