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GL6840

Hynix Semiconductor
Part Number GL6840
Manufacturer Hynix Semiconductor
Description Electronic Two Tone Ringer
Published Mar 23, 2005
Detailed Description GL6840 GL6840A Electronic Two Tone Ringer Description GL6840A are monolithic integrated circuits designed to replace t...
Datasheet PDF File GL6840 PDF File

GL6840
GL6840

Overview
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.
The output bridge configuration allows to use a high impedance transducer with acoustical results much better than in a single ended configuration.
The two outputs can also be connected independently to different converters or actu...


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