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LS1240 View Datasheet(PDF) - Contek Microelectronics

Part Name
Description
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LS1240 Datasheet PDF : 4 Pages
1 2 3 4
LS1240A
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
LINE
Contek
1
GROUND 2
SWEEP RATE
CONTROL
CAPACITOR
3
OUTPUT
FREQUENCY
CONTROL
4
RESISTOR
8 LINE
7
RECTIFIER
CAPACITOR
6 NULL
5 BUZZER
APPLICATION CIRCUIT
1 mF 2.2kW
1 mF 2.2kW
8
5
LINE
7 Contek LS1240
10 mF
1
23
4
C1
100nF
R1
14kW
BUZZER
Zload>1kW
8
5
LINE
7 ContekLS1240A
10 mF
1
23
4
C1
100nF
R1
14kW
CL
RL=50W to
1000W
No current limitation is provided on the output stage of Contek LS1240A ,so a minimum load DC of 50 ohms is
adviced.
The two tone frequencies generated are switched by an 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 signal and the circuit is designed so that noise on the lin or variations of the ringing signal cannot affect
correct operation of the device.
Contek Microelectronics Co.,Ltd.
3
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
 

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