LM567 Audio codec - Tone decoder 500KHz

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The LM567CN/NOPB is a general purpose Tone Decoder designed to provide a saturated transistor switch to ground when an input signal is present within the pass-band. The circuit consists of an I and Q detector driven by a voltage controlled oscillator which determines the center frequency of the decoder. External components are used to independently set center frequency, bandwidth and output delay.
  • 20 to 1 Frequency range with an external resistor
  • Logic compatible output with 100mA current sinking capability
  • Bandwidth adjustable from 0 to 14%
  • High rejection of out of band signals and noise
  • Immunity to false signals
  • Highly stable center frequency
  • 0.01Hz to 500kHz Center frequency adjustable
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