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LS1240A - ELECTRONIC TWO - TONE RINGER

Datasheet Summary

Description

LS1240A is a monolithic integrated circuit designed to replace the mechanical bell in telephone sets in connection with an electro-acoustical converter.

It can drive directly a piezoceramic converter (buzzer)or a dynamic loudspeaker.

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Datasheet Details

Part number LS1240A
Manufacturer STMicroelectronics
File Size 496.78 KB
Description ELECTRONIC TWO - TONE RINGER
Datasheet download datasheet LS1240A Datasheet
Additional preview pages of the LS1240A datasheet.

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Full PDF Text Transcription

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® LS1240A ELECTRONIC TWO - TONE RINGER . . . . . LOW CURRENT CONSUMPTION, IN ORDER TO ALLOW THE PARALLEL OPERATION OF 4 DEVICES INTEGRATED RECTIFIER BRIDGE WITH ZENER DIODES TO PROTECT AGAINST OVERVOLTAGES LITTLE EXTERNAL CIRCUITRY TONE AND SWITCHING FREQUENCIES ADJUSTABLE BY EXTERNAL COMPONENTS INTEGRATED VOLTAGE AND CURRENT HYSTERESIS Minidip DESCRIPTION LS1240A is a monolithic integrated circuit designed to replace the mechanical bell in telephone sets in connection with an electro-acoustical converter. It can drive directly a piezoceramic converter (buzzer)or a dynamic loudspeaker. The output current capability of LS1240A is higher than standard ringer. For driving a dynamic loudspeaker LS1240A can simply use a decoupling capacitor, thus eliminating the usual transformer.
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