Description:
The NTE989 is a general purpose Phase Locked Loop (PLL) in a 14–Lead DIP type package containing a stable, highly linear voltage controlled oscillator for low distortion FM demodulation, and a double balanced phase detector with good carrier suppression. The VCO frequency is set with an external resistor and capacitor, and tuning range of 10:1 can be obtained with the same capacitor. The characteristics of the closed loop system–bandwidth, response speed, capture and pull in range– may be adjusted over a wide range with an external resistor and capacitor. The loop may be broken between the VCO and the phase detector for insertion of a digital frequency divider to obtain frequency multiplication.

Features:
● 200ppm/°C frequency stability of the VCO
● Power supply range of ±5 to ±12 volts with 100ppm/% typical
● 0.2% linearity of demodulated output
● Linear triangle wave with in phase zero crossings available
● TTL and DTL compatible phase detector input and square wave output
● Adjustable hold in range from ±1% to > ±60%

Applications:
● Data and tape synchronization
● Modems
● FSK demodulation
● FM demodulation
● Frequency synthesizer
● Tone decoding
● Frequency multiplication and division
● SCA demodulators
● Telemetry receivers
● Signal regeneration
● Coherent demodulators