LM567CN Tone Decoder NSC
Part no.:LM567CN
Description:Tone Decoder
Manufacturer:NSC  [ National Semiconductor ]
Package:Dual-In-Line and Small Outline

General 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 Applications the decoder. External components

are used to independently set center frequency, bandwidth and output delay.

Features
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
Center frequency adjustable from 0.01 Hz to 500 kHz

Applications
Touch tone decoding
Precision oscillator
Frequency monitoring and control
Wide band FSK demodulation
Ultrasonic controls
Carrier current remote controls
Communications paging decoders