LM567CN Tone Decoder/Lock Detector IC with Programmable Frequency (0.01Hz-500kHz), High Noise Immunity 20mA Output Sink Wide Supply Range (4.75V-9V) DIP-8 Package

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

General Description

The LM567andLM567Caregeneralpurpose 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 indepen dently set center frequency, bandwidth and output delay.

INFORMATION

Drawing

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