Data Sheet

NTE1489
Integrated Circuit
Stereo Demodulator

Description:
The NTE1489 is a silicon monolithic integrated circuit in a 16-Lead DIP type package designed for use as an FM multiplex demodulator for high class stere0 FM tuners. As the IC adopts a PLL (Phase Lock Loop) system, complexity of control is usually experienced when using conventional external coil is eliminated and the demodulator can easily be constructed by simply controlling the external semi-fixed potentiometer. Internal circuits are composed of a stereo demodulator, a lamp driver, an input stage pre-amplifier that is capable of establishing variable input signal levels, a VCO (Voltage Controlled Oscillator) constituting PLL, a phase comparator, a LPF (Low Pass Filter), a frequency divider, and a DC amplifier. A stereo-monaural automatic switching circuit, a circuit for manual switching, VCO forced stop circuit, etc. are built-in.

Features:
Fewer External Components. Coil is not used.
Low Monaural Total Harmonic Distortion
Low Stereo Total Harmonic Distortion
High Channel Separation
Built-In Output Stage Post Amplifier
Stereo-Monaural Switching can be made either Automatically or Manually from Outside. The
Shock Noise at Switching is Reduced Considerably.
Stereo-Monaural Switching Operation is perfectly Synchronized with the Stereo Indicator Lamp
Monitoring of VCO Free Running Frequency can be Performed by Directly Connecting the Frequency
Counter to Pin9.
High Signal-to-Noise Ratio
Wide Maximum Input Level

Replaces:
ECG1489

Additional Model #'s
76-NTE1489
NTE1489

UPC: 768249044116