LS1240A-S08-T(2005) View Datasheet(PDF) - Unisonic Technologies
Part Name
Description
Manufacturer
LS1240A-S08-T Datasheet PDF : 5 Pages
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LS1240A
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
TELEPHONE 1
LINE
2
GND
RECTIFIER
IN BRIDGE IN
8
TELEPHONE
LINE
7
RECTIFIER
CAPACITOR
SWEEP RATE
3
CONTROL CAPACITOR
SWITCHING
FREQUENCY
GENERATOR
THRESHOLD
CIRCUIT
WITH
HYSTERESIS
6 N.C.
4
OUTPUT FREQYENCY
CONTROL RESISTOR
NONE
FREQUENCY
GENERATOR
OUTPUT
STAGE
5
BUZZER
TEST CIRCUIT
1 µF
2.2kΩ
8
5
VAB
7 UTC LS 1240A RL Vout
10 µF
1
23
4
R1
C1 14kΩ
100nF
R1= 27200 *(1-0.04 In f1
f1(Hz)
1943
) f2=0.725f1
fSWEEP
=
750
C1(nF)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R108-002,H
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