NTE1461 Integrated Circuit Phase Lock Loop (PLL) FM Stereo Demod Description: The NTE1461 is a multiplex integrated circuit in a 16−Lead SIP type package designed for use in FM car stereo applications. Due to its low distortion factor, this device can be used as a multiplex stereo demodulator appropriate for car component stereo units. Functions: D Stereo Noise Control (SNC Pin): Through controlling the quality of sound from stereo mode to monaural mode with the voltage applied to the control pin, the FM stereo noise in the weak electic field is reduced by this function. D High−Cut Control Function (HCC Pin): The FM noise in weak electric field is reduced through the attenuation of high frequency thereof. Such attenuation can be changed smoothly from “Normal” to “High−Cut” by controlling the voltage applied to the control pin. The volume of “High−Cut” can be selected by using a capacitor installed at the outside of he unit. D Stereo/Monaural Automatic Conversion: This conversion operates in priority to the stereo noise control. Preference on the pilot input. D Stoppage of VCO Oscillation: When a voltage higher than 6V is applied on the HCC pin, the oscillation of VCO can be discontinued. An erroneous operation of stereo lamp does not happen even at this stage. D With spearation control terminal Features: D Low Distortion Factor: 0.05% Typ, 300mV Input Mono D The Ripple of Power Source can Effectively be Rejected D Wide Supply Voltage Range: VCC = 6.5V to 14V Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage, VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V Lamp Driving Current, IL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Allowable Power Dissipation (TA ≤ +45°C), PDmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 520mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +125°C Recommended Operating Conditions: (TA = +25°C unless otherwise specified) Recommended Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 to 14V Input Signal Voltage, Vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 to 300mV Electrical Characteristics: (TA = +25°C, VCC = 10V, Vi = 300mV, f = 1kHz, L + R = 90%, Pilot = 10% unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Current ICCO − 21 27 mA Channel Separation Sep 40 50 − dB − 0.05 0.2 % Main − 0.05 0.2 % L = R = 90%, Pilot = 10% 60 85 120 mV − 3 6 dB − ±3 − % 140 200 280 mV Monaural Distortion Stereo Distortion THDMono Mono = 300mV THDST Lamp Turn−On Level VL Hysteresis hy Capture Range CR Pilot = 30mV Output Signal Level Vo Sub Signal−to−Noise Ratio S/N 70 78 − dB ri − 20 − kΩ SCArej − 80 − dB THD = 1% 700 800 − mV −8.5 −3.0 −0.3 Input Resistance SCA Rejection Allowable Input Voltage Vi SNC Output Attenuation SNCAtt V8 = 0.6V, L − R = 90%, Pilot = 10% SNC Output Voltage Vosub V8 = 0.1V, L − R = 90%, Pilot = 10% − − 5 mV HCC Output Attenuation HCCAtt V7 = 0.6V, L + R = 90%, Pilot = 10% −15 −6 −0.5 dB V7 = 1V, L + R = 90%, Pilot = 10% −2 − 0 dB dB Power Ripple Rejection RR − 35 − dB VCO Stopping Voltage VCOStop − 6.8 − V CHBa − 0.5 1.5 dB Channel Balance Pin Connection Diagram (Front View) 16 OSC Constants 15 Ripple Filter 14 Ripple Filter 13 19kHz 12 Pilot Detector 11 Pilot Detector 10 Stereo Lamp 9 GND 8 Stereo Noise Control 7 High Cut Control 6 Rt Ch Output 5 Lt Ch Output 4 3 High Cut Constant Separation Adjust 2 Composite Signal Input 1 VCC .953 (24.1) .257 (6.5) .127 (3.2) .334 (8.48) .125 (3.17) .059 (1.5) .118 (3.0)