View tda7331 datasheet:

TDA7331 ® SINGLE CHIP RDS DEMODULATOR + FILTER VERY HIGH RDS DEMODULATION QUALITY WITH IMPROVED DIGITAL SIGNAL PROC- ESSING HIGH PERFORMANCE, 57KHz BANDPASS FILTER (8th ORDER) PURELY DIGITAL RDS DEMODULATION WITHOUT EXTERNAL COMPONENTS ARI INDICATION AND RDS SIGNAL QUAL- ITY OUTPUTS DIP20 SO20 4.332MHz CRYSTAL OSCILLATOR (8.664 and 17.328MHz SELECTABLE OP- ORDERING NUMBERS: TIONS) LOW NOISE CMOS TECHNOLOGY TDA7331 TDA7331D LOW RADIATION DESCRIPTION caded antialiasing + switched capacitors band- The TDA7331, an improved version of pass filter for precise RDS band selection and a TDA7330B, recovers the additional inaudible demodulating section that performs the extraction RDS information which is transmitted by FM radio od RDS data stream (RDDA) and clock (RDCL)