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GL6840 - Electronic Two Tone Ringer

General Description

GL6840A are monolithic integrated circuits designed to replace the mechanical bell in telephone sets, in connection with an electro acoustical converter.

The device can drive either directly a piezo ceramic converter(buzzer) or a small loudspeaker.

In this case a transformer is needed.

Key Features

  • Test Circuit For GL6840A f1 =.
  • Low current consumption, in order to allow the 1000 f 2 = 0.717 x f1 fsweep = parallel operation of 4 devices C1(.
  • Ý ).
  • Integrated rectifier bridge with zener diodes to 1.
  • Þ 2.2.
  • Ú protect against overvoltages Buzzer.
  • Little external circuitry.
  • Tone and switching frequencies adjustable by VAB Line 8 5 external components GL6840A 7 6 £ «.
  • Integrated voltage and current hysteresis 1 2 3 4 10.
  • Þ.

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Datasheet Details

Part number GL6840
Manufacturer SK Hynix
File Size 87.46 KB
Description Electronic Two Tone Ringer
Datasheet download datasheet GL6840 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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GL6840 GL6840A Electronic Two Tone Ringer Description GL6840A are monolithic integrated circuits designed to replace the mechanical bell in telephone sets, in connection with an electro acoustical converter. The device can drive either directly a piezo ceramic converter(buzzer) or a small loudspeaker. In this case a transformer is needed. The two tone frequencies generated are switched by an internal oscillator in a fast sequence and made audible across output amplifiers in the transducer, both tone frequencies and switching frequency can be externally adjusted. The supply voltage is obtained from the AC rings signal and the circuit is designed so that noise on the line or variations on the ringing signal cannot affect the correct operation of the devices.