Data Sheet

NTE1533
Integrated Circuit
AM Tuner for Car Radio

Description:
The NTE1533 is developed for Tuning AM on a Car Radio. It uses low voltage oscillation to achieve
varactor diode tuning instead of variable inductance tuning.

Functions:
An RF Amplifier
A Mixer
An Oscillator with Automatic Level Control (ALC)
An IF Amplifier
A Detector
Normal AGC
Wide Band AGC on an RF Amplifier

Features:
Double Balanced Mixer: Recovers IF and Spurious Interference.
Normal AGC: Less Influence of Detector Output against Varying Input.
RF Wide Band AFC: Low Operating Level (300mVRMS) Recovers Intermodulation Distortion,
Large Input Characteristic at Tuning Case of Varactor Diodes.
AGC Driving Output to FET: Applies AGC to the Input FET at Varactor Diode Tuning.
Automatic Level Control at Oscillator: Recovers a Tracking Error because an Oscillation Output
is Stabilized at Low Voltage Level (350mVRMS) for Varactor Diode Tuning.
Reference Voltage Output: 5.6V Reference Voltage for Other Uses.
Compensation for VCC error: Lower gain error and distortion over 7.5V to 16.0V.
Lower Ripple Voltage: Less Modulation of Carrier by Supply Voltage Ripples.
Low Pop Noise: Of Time Constant of AGC at VCC On and Mode Switch On.

Replaces:
ECG1533

Additional Model #'s
76-NTE1533
NTE1533

UPC: 768249053514