NTE1631 Integrated Circuit FM Stereo Multiplexer w/ Soft Muting Features: D Compact Package D Channel separation as well as high−frequency cutting can be controlled by means of control inputs D A control input us used to force monaural operation and inhibit oscillations when the applied voltage is low (VCC = 0V) D For a fixed−input waveform phase shift (sub−signal reduced 20%) channel seperation is set to maximum using an internal resistance. D Setting the AM switching input to high forces monaural operation, inhibits oscillations, and cancels the high−cut function. D Setting the forced monaural input to high forces monaural operation and inhibits oscillations D Precautions have been taken to eliminate abnormal operation as well as pop noise occuring with power supply and mode switching functions D Indepent high−impedance demodulating and PLL inputs have been provided to enable either directly connected or independent operation D Wide dynamic range D +3dB input/output gain D Low distortion (0.1%) D Wide supply voltage range (6V to 12V) Applications: D Car Stereo D Music Center D Stereo adio Cassette Tape Recorder D Other Stereo Equipment Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25 to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55 to +125°C Electrical Characteristics: (TA = +25°C, VCC = 9V unless otherwise specified) Parameter Power Supply Voltage Symbol Test Conditions Min Typ Max Unit VCC 6 9 12 V IQ − 11 − mA Channel Separation Sep 30 40 − dB Total Harmonic Distortion THD 200mVrms MAIN − 0.1 0.9 % Input Voltage VIN THD = 2% 2 − − Vp−p Voltage Gain GV − 3 − dB Pilot On Level PIN − 8 14 mVrms Input Impedance ZIN − 40 − kΩ Quiescent Current Pin Connection Diagram 16 PLL Filter 15 OSC Time Constant 14 PLL Filter 13 Lamp Filter 12 fO Check AM Switching 11 Lamp Filter 10 Lamp Output 9 GND 8 Forced Monaural 7 Rt Output 6 Control Input 5 Lt Output 4 VCC 3 Time Constant 2 PLL Input 1 Input .110 (2.79) .768 (19.5) .079 (2.0) .039 (1.0) R .228 (5.8) .390 (9.9) .012 (0.30) .022 (0.56) .050 (1.27) 3 1 2 5 4 .108 (2.7) .750 (19.05) 7 9 11 6 8 10 13 12 14 15 16