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LS1240A-S08-R Datasheet(PDF) 3 Page - Unisonic Technologies

Part # LS1240A-S08-R
Description  ELECTRONIC TONE RINGER WITH BUILT-IN BRIDGE RECTIFIER
PDF  5 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

LS1240A-S08-R Datasheet(HTML) 3 Page - Unisonic Technologies

  LS1240A-S08-R Datasheet HTML 1Page - Unisonic Technologies LS1240A-S08-R Datasheet HTML 2Page - Unisonic Technologies LS1240A-S08-R Datasheet HTML 3Page - Unisonic Technologies LS1240A-S08-R Datasheet HTML 4Page - Unisonic Technologies LS1240A-S08-R Datasheet HTML 5Page - Unisonic Technologies  
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LS1240A
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
3 of 5
www.unisonic.com.tw
QW-R108-002.I
BLOCK DIAGRAM
1
2
3
4
8
7
6
5
N.C.
BUZZER
TELEPHONE
LINE
RECTIFIER
CAPACITOR
IN
IN
RECTIFIER
BRIDGE
THRESHOLD
CIRCUIT
WITH
HYSTERESIS
OUTPUT
STAGE
NONE
FREQUENCY
GENERATOR
SWITCHING
FREQUENCY
GENERATOR
SWEEP RATE
CONTROL CAPACITOR
OUTPUT FREQYENCY
CONTROL RESISTOR
GND
TELEPHONE
LINE
TEST CIRCUIT
R1=
27200
f1(Hz)
f2=0.725f1
fSWEEP =
750
C1(nF)
2.2k
1 F
10 F
C1
100nF
R1
14k
RL
Vout
VAB
85
7
1
2
3
4
UTC LS1240A
*(1-0.04 In
f1
1943
)



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