LS7509 controllers equivalent, tone activated telephone line switch controllers.
* Circuit activated by Tone with specific Frequency and Time Duration.
* Frequency and Time Duration values are mask
programmable.
* Small Signal (as low as .
* Remote telephone line testing
* Remote meter reading
* Security system dialers.
Nov. 1993
CONNECTION DIA.
The LS7501 - LS7510 are CMOS frequency discriminator circuits designed to respond to a specific frequency TONE signa.
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