NTE1864 Integrated Circuit PLL (Phase Lock Loop) FM Stereo Demodulator w/Blend Description: The NTE1864 is a phase lock loop FM stereo demodulator with a DC control pin for reducing noise by decreaseing separation during weak signal conditions. Features: D Blend Control D Large Input Overload D Low Beat Note Distortion D Low THD Diode Switching Outputs D VCO Stop Function D Wide Supply Range: +7V to +15V D Mono Override Pin Applications: D Automobile Radios D Hi Fi Receivers and Tuners D High Performance Portable Radios Absolute Maximum Ratings: Supply Voltage, Pin3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Lamp Driver Voltage, Pin11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Output Voltage, Pin12, Pin13, Supply Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Quick Mono Input (Pin1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ (Pin3) Blend Input (Pin20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9W Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +125°C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C Note 1. For operation in ambient temperatures above +25°C, the device must be derated based on a +150°C maximum junction temperature and a thermal resistance of +65°C/W junction to ambient. Electrical Characteristics: (TA = +25°C, V+ = 8V) Parameter Test Conditions Min Typ Max Unit Operating Supply Voltage 7 8 15 V Supply Current − 26 45 mA Pin19 − 4 − V Pin2 − 1.8 − V 15 30 − dB DC Input DC Voltage Supply Rejection Lamp Leakage Current Lamp Off, Pin11 = 16V − 0.1 100 µA Lamp Saturation Voltage Lamp Off, Pin11 @ 75mA − 1.4 2.0 V VCO Stop Voltage Voltage at Pin4 to Stop VCO 0.2 0.4 − V VCO Stop Current Pin4 = 0.2V − −30 −100 µA Blend Input Bias Current Pin20 = 0V − −2 −20 µA − 4 − V − 2 − µA Quick Mono Switch Voltage Quick Mono Bias Current Pin1 = 8V Output Leakage Pin12 or Pin13 = 6.5V, Pin3 = 0V µA Audio Mono Gain 1kHz −4 −1 +2 dB Mono THD 1kHz @ 200mVrms − 0.05 0.25 % − ±0.4 ±1.5 dB Channel Balance Gain Shift Mono to Stereo − ±0.1 ±1.0 dB Channel Separation Pin20 ≥ 1.1V 30 45 − dB Output DC Shift Mono to Stereo − ±15 ±100 mV Input Resistance Pin19 20 40 − kΩ Output Resistance Pin12, Pin13 − 65 200 Ω Ultrasonic Rejection 19kHz + 38kHz − 30 − dB SCA Rejection Note 2 − 70 − dB Signal to Noise 1kHz @ 200mVrms Mono − 68 − dB Lamp On Voltage 19kHz on Pin2 − 15 20 mV Lamp Off Voltage 19kHz on Pin2 2.5 5.0 − mV − 10 − dB PLL Lamp Hysteresis Capture Range 25mVrms on Pin2 ±2 ±4 ±6 % Hold In Range 25mVrms on Pin2 − ±12 − % Input Resistance Pin2 8 14 − kΩ Blend (Pin20 from 1.1V to 0.2V) Stereo Gain Change 1kHz L = −R Input −25 −35 − dB Mono Gain Change 1kHz L = R Input −1.5 −0.5 0.5 dB 10kHz L = R Input −8 −14 −20 dB − ±40 ±100 mV Output DC Shift Note 2. Input is 10% SCA (74.5kHz), 9% pilot, and 1kHz left or right. Rejection is ratio of 1kHz output to 1.5kHz output. Pin Connection Diagram 20 Blend Control Voltage Quick Mono 1 PLL Input 2 19 Audio Input V+ 3 18 Blend Filter Lamp Filter and VCO Stop 4 17 Blend Filter 16 Blend Resistor and 19kHz Test Point Lamp Filter 5 Loop Filter 6 15 Left Gain and De−Emphasis 14 Right Gain and De−Emphasis Loop Filter 7 VCO Tuning 8 13 Left Output VCO Tuning 9 12 Right Output GND 10 11 Lamp Driver 20 11 .280 (7.12) Max 1 10 .995 (25.3) Max .300 (7.62) .280 (7.1) .100 (2.54) .125 (3.17) Min .385 (9.8)