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Documents LM567, LM567C
SNOSBQ4E – MAY 1999 – REVISED DECEMBER 2014 LM567x Tone Decoder
1 Features 3 Description 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 oscillator
which determines the center frequency of the
decoder. External components are used to
independently set center frequency, bandwidth and
output delay. 1 20 to 1 Frequency Range With an External
Resistor
Logic Compatible Output With 100-mA 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 …
