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| Silicore FM STEREO MULTIPLEX DECODER GENERAL DESCRIPTION The CD7343CS is a monolithic integrated circuit consisting of a phase locked loop FM stereo de modulator. It is designed for car stereo, cassette recorder and other CD7343CS Out line Drawing equipment. FEATURES Wide op erating supp ly voltage: Vcc=3.5V~12V High pilot la mp ON se nsitivity (VL(ON)= 9 mV) Built-in indicator lamp drive circuit Low distortion THD=0.08% at Vi=200mV BLOCK DIAGRAM 2 1 AF Phase Detector DC 19kHz<90 Buffer Lamp Trigger 19kHz<0 38kHz 7 6 FW Switch 4 Vcc 76kHz 1/2 1/2 1/2 Voltage Regulator 5 3 Stereo Decorder 8 9 PIN CONNECTION CD7343CS 1 2 3 4 5 6 7 8 9 INCOM FIL1 Vcc VCO GND DPY FIL2 OUTL OUTR SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 1/5 CHMC Silicore MAXIMUM RATINGS Characteristics Supply Voltage La mp Voltage Lamp Current (Con tinuous) Power Diss ipation Operating Ambient Temp erature Range Storage Temp erature Range Symbol Vcc VLAMP ILAMP PD Topr Tstg CD7343CS Value 12 16 20 500 -25~75 -55~150 Unit V V mA mW C C ELECTRICAL CHARACTERISTICS (Unless otherwise specified Vcc=8V,Ta mb=25C,f=1kHz) Characteristic Quiescent Circuit Current Maximu m Input Voltage Channel Separation Total Harmonic Distortion (mono) Total Harmonic Distortion (stereo) Voltage Gain Channel Balance La mp ON l evel La mp OFF level La mp Hysteresis Carrier Leakage Symbol ICCQ Test Condition Vi=0 Min. Typ. Max. 11 900 36 45 0.08 0.08 -2.0 0 0 9 2 6 3 L+R=180mV Vp=20mV 19kHz 38kHz 34 42 2.0 1.5 15 0.3 18 Unit mA mV dB % % dB dB mV mV mV dB dB Vi(max) L+R=90%, P=10%,THD=1% Sep THD1 THD2 Av CB L+R=180mV,Vp=20 mV Vi=200mV L+R=180mV,Vp=20 mV Vi=200mV Vi=200mV VL(ON) Pilot only VL(OFF) Pilot only VHY CL SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 2/5 CHMC Silicore TEST CIRCUIT CD7343CS CD7343CS 1000pF 220K IN SW1 C1 SG V1 ~ 620 10uF 1 R11K 2 3 45 R2 9.1K 330K 6 7 1uF SW4 8 9 4.7uF SW2 SW3 BPF 3.3K SW3 C2 4.7K 3.3K C4 LED 390 3.3K 0.015uF R7 0.015uF 4.7uF 3.3uF 1.0uF 2.2uF Vcc=8V Hz V2 ~ Hz V3 ~ BPF: 19kHzU 55dB 38kHzU 55dB L.P.F APPLICATION INFORMATION (refer to test circuit) External Components 1. Input coupling capacitor (C1) The reco mmended value is 10F. If s maller values than 10 F are used, lo w frequency separation will worsens, and if larg e values are used ,POP noise occurs strongly. 2. Low Pass Filter (C2, C1, R1) This is the low Pass filter for the PLL, which is determined the captu re range and THD at low frequency. 3. VCO network (C4, R2, R7) The VCO free running frequency is adjusted by connecting a frequency counter to monitor the 38kHz output of Pin6 . 4. Decoder Output (Pin8,9) These components provide Right and Left channel Output lo ad circuits . The reco mmended circuits as follows: From Pin 8,9 3.3K 4.7uF 400mH Output 2.2K 68nF 1nF 68nF From Pin 8,9 3.3K 15nF 4.7uF LPF 19kHz<55dB 38kHz<55dB Output SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 3/5 CHMC Silicore APPLICATION CIRCUIT CD7343CS CD7343CS IN 10uF 1 1K 2 3 1000pF 4 9.1K 5 6 220K 7 1uF 8 0.01uF 9 4.7uF OUT L(c) 4.7uF OUT R(c) 3.3uF 1.0uF 560 100uF Vcc CHARACTERISTICS CURVES 0.01uF 47K 3.3K 3.3K SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 4/5 CHMC Silicore CD7343CS SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 5/5 CHMC |
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