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PDF LS1240A Data sheet ( Hoja de datos )
| Número de pieza | LS1240A | |
| Descripción | ELECTRONIC TONE RINGER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
LS1240A
LINEAR INTEGRATED CIRCUIT
ELECTRONIC TONE RINGER
WITH BUILT-IN BRIDGE
RECTIFIER
DESCRIPTION
The UTC LS1240A is monolithic integrated circuits and
designed to be as a telephone ringer. It can drive a piezo-ceramic
converter(buzzer) directly. The output current capacity of UTC
LS1240A is higher than standard ringer. For driving a dynamic
loudspeaker, UTC LS1240A needs only a decoupling capacitor to
replace the usual transformer in use.
FEATURES
* Low current consumption.
* Integrated rectifier bridge with zener diodes to overvoltage
Protection.
* Minimum external circuitry.
* Both frequencies of tone and switching are adjustable by external
components.
* Integrated voltage and current hysteresis.
ORDERING INFORMATION
www.DataSheet4U.com
Ordering Number
Normal
Lead Free Plating
LS1240A-D08-T
LS1240AL-D08-T
LS1240A-S08-R
LS1240AL-S08-R
LS1240A-S08-T
LS1240AL-S08-T
Package
DIP-8
SOP-8
SOP-8
SOP -8
DIP-8
*Pb-free plating product number: LS1240AL
Packing
Tube
Tape Reel
Tube
LS1240AL-D08-T
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube
(2) D08: DIP-8, S08: SOP-8
(3) Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
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QW-R108-002,H
1 page  
LS1240A
TYPICAL APPLICATION CIRCUIT
1 µF 2.2kΩ
LINEAR INTEGRATED CIRCUIT
85
CL
LINE
7 UTC LS1240A
10 µF
1
23
4
C1
100nF
R1
14kΩ
RL=50Ω to
1000Ω
No current limitation is provided on the output stage of UTC LS1240A, so a minimum load DC of 50 ohms is
advised.
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 line or variations of the ringing signal cannot
affect correct operation of the device.
UTC assum es no responsibility for equipm ent failures that result from using products at values that
exceed, even m om entarily, rated values (such as m axim um ratings, operating condition ranges, or
other param eters) 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 system s where
m alfunction 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 inform ation
presented in this docum ent does not form part of any quotation or contract, is believed to be accurate
and reliable and m ay be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 5
QW-R108-002,H
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| PDF Descargar | [ Datasheet LS1240A.PDF ] | |
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