NTE1631 integrated circuit fm stereo multiplexer w/ soft muting features: compact package channel separation as well as high ? frequency cutting can be controlled by means of control inputs a control input us used to force monaural operation and inhibit oscillations when the applied voltage is low (v cc = 0v) for a fixed ? input waveform phase shift (sub ? signal reduced 20%) channel seperation is set to maximum using an internal resistance. setting the am switching input to high forces monaural operation, inhibits oscillations, and can- cels the high ? cut function. setting the forced monaural input to high forces monaural operation and inhibits oscillations precautions have been taken to eliminate abnormal operation as well as pop noise occuring with power supply and mode switching functions indepent high ? impedance demodulating and pll inputs have been provided to enable either directly connected or independent operation wide dynamic range +3db input/output gain low distortion (0.1%) wide supply voltage range (6v to 12v) applications: car stereo music center stereo adio cassette tape recorder other stereo equipment absolute maximum ratings: (t a = +25 c unless otherwise specified) supply voltage, v cc 14v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . power dissipation, p d 550mw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating temperature range, t opr ? 25 to +75 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ? 55 to +125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
electrical characteristics : (t a = +25 c, v cc = 9v unless otherwise specified) parameter symbol test conditions min typ max unit power supply voltage v cc 6 9 12 v quiescent current i q ? 11 ? ma channel separation sep 30 40 ? db total harmonic distortion thd 200mvrms main ? 0.1 0.9 % input voltage v in thd = 2% 2 ? ? v p ? p voltage gain g v ? 3 ? db pilot on level p in ? 8 14 m v rms input impedance z in ? 40 ? k ? pin connection diagram v cc f o check am switching lamp filter pll filter lt output forced monaural gnd rt output pll input time constant pll filter lamp output 15 14 13 12 osc time constant 11 lamp filter 10 9 8 7 control input 6 5 4 3 2 input 1 16
.390 (9.9) .768 (19.5) .039 (1.0) r .079 (2.0) .228 (5.8) .050 (1.27) .750 (19.05) .108 (2.7) .012 (0.30) .110 (2.79) .022 (0.56) 11 9 7 5 3 1 2 15 13 46810121416
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