BU1924F - Rohm

BU1924F RDS / RBDS decoder

Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol QUAL RDATA Vref MUX VDD1 VSS1 VSS3 CMP T2 T1 VSS2 VDD2 XI XO (N.C.) RCLK Crystal oscillator − Demodulator clock Digital power supply 2.7V to 5.5V Connects to 4.332MHz oscillator (refer to input/output circuits) − 1187.5Hz clock (refer to the timing diagram) Test input Open or connected to ground Type B −.

Features

1) Low current. 2) Two-stage anti-aliasing filter (LPF). 3) 57kHz band-pass filter. 4) DSB demodulation (digital PLL). 5) Quality indication output for demodulated data. zAbsolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Maximum input voltage Maximum output voltage Symbol VDD Limits VMax. IMax. Power dissipation Pd Operating temperature Storage temperature ∗1 Reduced by 10.0mW for each increase in Ta of 1°C over 25°C.(BU1924) ∗2 Reduced by 3.0mW for each increase in Ta of 1°C over 25°C.(BU1924F) ∗3 Reduced by 5.0mW for each increase in Ta of 1°C over 25°C.(BU1924FS) z.