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TDA7421N
AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS
PRELIMINARY DATA
s HIGH PERFORMANCE FRONT-END IC FOR AM/FM RECEIVERS
s FULLY INTEGRATED HIGH-SPEED PLL FOR OPTIMIZED RDS APPLICATIONS
s FM MPX/AM AUDIO OUTPUT, 450kHz AM IF OUTPUT FOR STEREO AM APPLICATIONS
s AM DOUBLE CONVERSION ARCHITECTURE
s AM/FM STATION DETECTOR AND DIGITAL IF-COUNTER
s SINGLE FREQUENCY REFERENCE FOR BOTH AM AND FM
s FULL ELECTRICAL ADJUSTMENT s I2C-BUS PROGRAMMABLE
DESCRIPTION The TDA7421N is a high-performance tuner circuit which integrates AM and FM sections, PLL frequency sinthesizer and IF counter on a single chip. Use of BICMOS technology allows the implementation of tuning functions with a minimum of external components.