NTE1461

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 Quiescent Current Channel Separation Monaural Distortion Stereo Distortion Lamp Turn−On Level Hysteresis Capture Range Output Signal Level Signal−to−Noise Ratio Input Resistance SCA Rejection Allowable Input Voltage SNC Output Attenuation SNC Output Voltage HCC Output Attenuation Power Ripple Rejection VCO Stopping Voltage Channel Balance Symbol ICCO Sep THDMono Mono = 300mV THDST VL hy CR Vo S/N ri SCArej Vi SNCAtt Vosub HCCAtt RR VCOStop CHBa 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 8 7 6 5 4 3 GND Stereo Noise Control High Cut Control Rt Ch Output Lt Ch Output High Cut Constant Separation Adjust Test Conditions Min − 40 − − 60 − − 140 70 − − Typ 21 50 0.05 0.05 85 3 ±3 200 78 20 80 800 − −6 − 35 6.8 0.5 Max 27 − 0.2 0.2 120 6 − 280 − − − − 5 −0.5 0 − − 1.5 Unit mA dB % % mV dB % mV dB kΩ dB mV dB mV dB dB dB V dB Main L = R = 90%, Pilot = 10% Pilot = 30mV Sub THD = 1% V8 = 0.6V, L − R = 90%, Pilot = 10% V8 = 0.1V, L − R = 90%, Pilot = 10% V7 = 0.6V, L + R = 90%, Pilot = 10% V7 = 1V, L + R = 90%, Pilot = 10% 700 − −15 −2 − − − −8.5 −3.0 −0.3 2 Composite Signal Input 1 VCC .953 (24.1) .127 (3.2) .257 (6.5) .334 (8.48) .125 (3.17) .059 (1.5) .118 (3.0)