• Wide frequency range (0.01 Hz to 500 kHz)

• Supply voltage: 5v typical

• High stability of center frequency

• Independently controllable bandwidth (up to 14pct)

• High out-band signal and noise rejection

• Logic-compatible output with 100mA current sinking capability

• Inherent immunity to false signals

• Frequency adjustment over a 20-to-1 range with an external resistor

• Touch-Tone decoding

• Carrier current remote controls

• Ultrasonic controls (remote TV, etc.)

• Communications paging

• Frequency monitoring and control

• Wireless intercom

• Precision oscillator

The NE567 or SE567 is a Phase Locked Loop (PLL) Tone Decoder.
It is highly stable with synchronous AM lock detection and power output circuitry.
Its primary function is to drive a load whenever a sustained frequency within its detection band is present at the self-biased input.
The bandwidth center frequency and output delay are independently determined by means of four external components.

Circuits using a 567 Tone Decoder: