LM567 Datasheet (National Semiconductor)

LM567, Tone Decoder

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 d

LM567 Features

* n 20 to 1 frequency range with an external resistor n Logic compatible output with 100 mA current sinking capability n Bandwidth adjustable from 0 to 14% Connection Diagrams Metal Can Package Dual-In-Line and Small Outline Packages DS006975-1 Top View Order Number LM567H or LM567CH See NS Package