LM567N decoder equivalent, tone decoder.
* 20 to 1 Frequency Range with an External Resistor
* Logic Compatible Output with 100 mA Current Sinking Capability
* Bandwidth Adjustable from 0 to 14%
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* Touch Tone Decoding
* Precision Oscillator
* Frequency Monitoring and Control
* Wide Band FSK Demodul.
The LM567 and LM567C are general purpose tone decoders designed to provide a saturated transistor switch to ground when an input signal is present within the passband. The circuit consists of an I and Q detector driven by a voltage controlled oscill.
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