LMC567 Datasheet (National Semiconductor)

LMC567, Low Power Tone Decoder

The LMC567 is a low power general purpose LMCMOS™ tone decoder which is functionally similar to the industry standard LM567.

It consists of a twice frequency voltage-controlled oscillator (VCO) and quadrature dividers which establish the reference signals for phase and amplitude detectors.

The phase

LMC567 Features

* n n n n n n n n n n Functionally similar to LM567 2V to 9V supply voltage range Low supply current drain No increase in current with output activated Operates to 500 kHz input frequency High oscillator stability Ground-referenced input Hysteresis added to amplitude comparator Out-of-band signals and