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CXA2020S Dataheets PDF



Part Number CXA2020S
Manufacturers Sony Corporation
Logo Sony Corporation
Description EIAJ Sound Multiplexing Decoder
Datasheet CXA2020S DatasheetCXA2020S Datasheet (PDF)

CXA2020M/S EIAJ Sound Multiplexing Decoder Description The CXA2020M/S, is a bipolar IC designed as EIAJ TV sound multiplexing decoder, provides various functions including sound multiplexing demodulation, broadcast mode identification (stereo/bilingual discrimination display), mode display, and muting. Features • Adjustment free of filter. • High frequency stereo separation improved. • An internal active filter greatly reduces the external parts. • Use of the countdown method for broadcast mode .

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CXA2020M/S EIAJ Sound Multiplexing Decoder Description The CXA2020M/S, is a bipolar IC designed as EIAJ TV sound multiplexing decoder, provides various functions including sound multiplexing demodulation, broadcast mode identification (stereo/bilingual discrimination display), mode display, and muting. Features • Adjustment free of filter. • High frequency stereo separation improved. • An internal active filter greatly reduces the external parts. • Use of the countdown method for broadcast mode identification eliminates the necessity of adjusting the identification system (Cue oscillator). • Output level: 520mVrms (1kHz, monaural, 100%). • Internal filter eliminates interference from digital facsimile signals. • The discrimination time needed to shift from multiplexing sound to monaural sound is reduced. • Forced monaural mode can be set to operate only for stereo broadcasts or for stereo/bilingual broadcasts. Applications • Color TVs • Hi-Fi VCRs Structure Bipolar silicon monolithic IC Pin Configuration GND 1 NC 2 REFL 3 Vcc 4 NC 5 CXA2020M 28 pin SOP (Plastic) CXA2020S 22 pin SDIP (Plastic) Absolute Maximum Ratings (Ta = 25°C) [ ( ) is the pin No. for the CXA2020S.] • Supply voltage VCC 10 • Input signal (Pin 6) Vis 0.6 • Control voltage (Pins 5, 12, 13, 14) Vic VCC • Operating temperature Topr –20 to +75 • Storage temperature Tstg –65 to +150 • Allowable power dissipation PD (A2020M) 1000 (A2020S) 900 • LED drive current ILED 10 Operating Supply Voltage Range 8.5 to 9.5 V Vp-p V °C °C mW mW mA V CXA2020M 28 SUBI 27 NC 26 SC OUT 25 SC IN 24 NC GND 1 NC 2 REFL 3 Vcc 4 CXA2020S 22 SUBI 21 SC OUT 20 SC IN 19 MC OUT CXA2020M MPX IN 7 NC 8 CUBI 9 22 MC IN 21 L OUT 20 R OUT 19 M OUT 18 FOMO 17 MUTE 16 MODE 15 NC MPX IN 6 NC CUBI 7 8 CXA2020S MO MODE 6 23 MC OUT MO MODE 5 18 MC IN 17 L OUT 16 R OUT 15 M OUT 14 FOMO 13 MUTE 12 MODE NC 10 LEDST 11 LEDSU 12 LEDM 13 NC 14 LEDST 9 LEDSU 10 LEDM 11 Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. –1– E94Y28-ST CXA2020M/S Block Diagram CXA2020M MC OUT SC OUT M OUT R OUT L OUT FOMO MODE MC IN SUBI SC IN MUTE NC NC NC 15 14 12 LED DRIVE 11 28 27 26 25 24 23 22 21 20 19 18 17 16 TEST SUBDEEM MAINDEEM MAIN SUB OUTPUT AMP & OUTPUT SW L R MAIN OUT FM DEMOD MATRIX IIL LOGIC & CONT CUE CARRIER 3.5fH 952Hz CLOCK CLOCK 3.5fH VCO 952Hz BPF LED DRIVE SUB DET SUB BPF 4.5fH TRAP CUE BPF BUFFER BIAS CURRENT BIAS VOLTAGE VOLTAGE REGULATOR AM DEMOD COMP IN AMP IBIAS 1 2 3 4 5 6 7 MPX SIGNAL 9 8 10 11 12 13 MO MODE LEDST CUBI NC GND REFL MPX IN NC NC LEDSUB NC CXA2020S MC OUT SC OUT M OUT R OUT FOMO L OUT MODE LEDMAIN SUBI SC IN MC IN MUTE 22 21 20 19 18 TEST 17 16 15 14 13 SUBDEEM MAINDEEM OUTPUT AMP & OUTPUT SW MAIN L R SUB MAIN OUT FM DEMOD MATRIX IIL LOGIC & CONT CUE CARRIER 3.5fH 952Hz CLOCK CLOCK 3.5fH VCO 952Hz BPF SUB DET SUB BPF 4.5fH TRAP CUE BPF BUFFER BIAS CURRENT BIAS VOLTAGE VOLTAGE REGULATOR AM DEMOD COMP IN AMP IBIAS 1 2 3 4 5 6 MPX SIGNAL 7 8 9 10 MO MODE MPX IN CUBI NC LEDST NC –2– LEDSUB REFL GND Vcc LEDMAIN Vcc NC CXA2020M/S Pin Description (Ta = 25°C, VCC = 9V) PIn No. SOP SDIP 1 2 5 8 10 14 15 24 27 1 Symbol GND Pin voltage 0 The pin numbers in parentheses are for the CXA2020S. Equivalent circuit GND. Description 2 7 NC — — Keep these pins open. (They are not connected to the chip.) Vcc 147 3 3 REFL 1.2V 3 3.3k 20k 24k 20k GND The noise elimination filter connection of internal reference voltage. 4 4 VCC — Power supply. Forced monaural mode selection. When Low or open, the forced monaural mode operates for stereo broadcasts only; if High, the forced monaural mode operates for both stereo and bilingual broadcasts. 6 (5) 70k 6 5 MO MODE — 50k 10.5k GND Vcc 138k 147 7 6 MPXIN 4.1V 7 (6) 25k 80µ 30k 4.2V GND Sound multiplexing signal input. Typical input level = 70mVrms (monaural, 100%) Vcc 1k 147 40k 40k Vcc 9 8 CUBI 4.1V 11k 2k 4.2V 9 (8) 40k Bias capacitor connection of Cue pulse generator. –3– CXA2020M/S Pin No. SOP SDIP Symbol Pin voltage 11 (9) 12 (10) 13 (11) Equivalent circuit Description 11 9 LEDST 10.5k 10.5k 64k 10.5k 64k 64k 16k 16k 12 10 LEDSU — Mode indicator LED connection. Pin 11 (9): stereo Pin 12 (10): sub Pin 13 (11): main 13 11 LEDM 16k GND Vcc 20µ 16 12 MODE — 20k 16 (12) 10.5k 16k 4.2V 40k GND DC voltage-based output mode switch for bilingual broadcasts. 17 (13) 70k 17 13 MUTE — 50k 10.5k GND GND Output muting. When High, only DC is output from Pins 19, 20 and 21 (15, 16 and 17). 18 (14) 70k 18 14 FOMO — 50k 10.5k GND .


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