CXA2202N EIAJ Sound Multiplexing Decoder Description The CXA2202N, 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) • Internal filter eliminates interference from digital facsimile signals • The discrimination time needed to shift from multiplexing sound to monaural sound is reduced. • Output level: 520mVrms (1kHz, monaural, 100%) • Forced monaural mode can be set to operate only for stereo broadcasts or for stereo/bilingual broadcasts. Applications • Color TVs • Hi-Fi VCRs 24 pin SSOP (Plastic) Structure Bipolar silicon monolithic IC Absolute Maximum Ratings (Ta = 25°C) • Supply voltage Vcc 10 V • Input signal (Pin 7) Vis 0.6 Vp-p • Control voltage (Pins 6, 13, 14, 15) Vic Vcc V • Operating temperature Topr –20 to +75 °C • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation PD 520 mW • LED drive current ILED 10 mA Operating Supply Voltage Range 8.5 to 9.5 Pin Configuration GND 1 24 SUBI NC 2 23 NC REFL 3 22 SC OUT Vcc 4 21 SC IN NC 5 20 MC OUT MO MODE 6 19 MC IN MPX IN 7 18 L OUT NC 8 17 R OUT CUBI 9 16 M OUT LEDST 10 15 FOMO LEDSU 11 14 MUTE LEDM 12 13 MODE V 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– E02964 CXA2202N NC SC OUT SC IN MC OUT MC IN L OUT R OUT M OUT FOMO MUTE MODE 24 23 22 21 20 19 18 17 16 15 14 13 MAINDEEM SUBDEEM TEST SUBI Block Diagram OUTPUT AMP & OUTPUT SW MAIN L R MAIN OUT SUB FM DEMOD MATRIX IIL LOGIC & CONT SUB DET SUB BPF BUFFER BIAS VOLTAGE 4.5fH TRAP 6 NC REFL Vcc NC MO MODE MPX SIGNAL 7 8 9 10 11 12 LEDM 5 LED DRIVE LEDSU 4 COMP LEDST 3 952Hz BPF CUBI 2 AM DEMOD 952Hz CLOCK NC 1 GND IN AMP VOLTAGE REGULATOR IBIAS CUE BPF 3.5fH CLOCK 3.5fH VCO MPX IN BIAS CURRENT CUE CARRIER –2–