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LS1240A - ELECTRONIC TONE RINGER

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.

Features

  • S.
  • 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.

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Full PDF Text Transcription (Reference)

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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.
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