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LMC567

Part Number	LMC567
Manufacturer	National Semiconductor
Description	Low Power Tone Decoder
Published	Apr 25, 2005
Detailed Description	LMC567 Low Power Tone Decoder June 1999 LMC567 Low Power Tone Decoder General Description The LMC567 is a low power ge...
Datasheet	LMC567 PDF File

Overview

LMC567 Low Power Tone Decoder June 1999 LMC567 Low Power Tone Decoder General Description 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 detector and VCO form a phase-locked loop (PLL) which locks to an input signal frequency which is within the control range of the VCO.
When the PLL is locked and the input signal amplitude exceeds an internally pre-set threshold, a switch to ground is activated on the output pin.
External components set up...

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