NTE1230 Integrated Circuit FM Multiplex Stereo Demodulator Description: The NTE1230 is a monolithic integrated circuit in a 16–Lead DIP type package designed for use as an FM stereo multiplex demodulator. This device includes 2 channel amplifiers that can make the 0dB line output. Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage, VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Lamp Driver Current, IL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Preamp Output Stage Current, I6, I8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5mA Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +80°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Recommended Operating Conditions: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V Electrical Characteristics: (TA = +25°C, VCC = 9V, f = 1kHz, Input = 100mV, L + R = 90%, Pilot = 10% unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Current ICC – 15 20 mA Lamp “ON” Level VL 50 – 100 mV – – 4.0 dB 35 – – dB 35 – – dB – – 1.5 % – – 1.5 % 200 – 400 mV 200 – 400 mV – – 2.0 dB – 55 – dB Hysteresis of Lamp “ON – OFF” Channel Separation Left Channel Sep Right Channel Total Harmonic Distortion Left Channel THD Right Channel Output Voltage Left Channel VO Right Channel Channel Balance SCA Rejection Ba L + R = 80%, Pilot = 1–%, SCA = 10% Pin Connection Diagram Input 1 16 Bypass Bypass 2 15 Bypass GND 3 14 19kHZ Trap Pilot Lamp 4 13 38kHZ Trap Lt Ch Amp Input 5 12 38kHZ Trap Lt Ch Amp Output 6 11 MPX Output Lt Rt Ch Amp Input 7 10 MPX Output Rt Rt Ch Amp Output 8 9 16 VCC 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)