LM567 Tone Decoder – Datasheet

The LM567 is a general-purpose tone decoder designed to provide a saturated transistor switch to the ground when an input signal is present within the passband. The circuit consists of an I and Q detector is driven by a voltage-controlled oscillator which determines the center frequency of the decoder. External components are used to independently set center frequency, bandwidth, and output delay.

LM567 Pinout

LM567 Pin Configuration

Pin No	Pin Name	Description
1	OUTPUT FILTER	Output Filter Pin
2	LOOP FILTER	Loop Filter Pin
3	INPUT	Input Pin
4	V+	Positive Supply Pin
5	TIMING RESISTOR	Timing Resistor Pin
6	TIMING CAPACITOR	Timing Capacitor Pin
7	GND	Ground Pin
8	OUTPUT	Output Pin

LM567 Features

• 20 to 1 frequency range with an external resistor
• Logic compatible output with 100 mA current sinkingcapability
• 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

Application

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

You can download this datasheet for LM567 Tone Decoder – Datasheet from the link given below: