BU1924 / BU1924F

Audio ICs

RDS / RBDS decoder

BU1924 / BU1924F

The BU1924 and BU1924F are RDS / RBDS decoders that employ a digital PLL and have a built-in anti-aliasing filter and

an eight-stage BPF (switched-capacitor filter). Linear CMOS circuitry is used for low power consumption.

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Applications

RDS / RBDS compatible FM receivers for American and European markets, car stereos, high-fidelity stereo systems and

components, and FM pagers.

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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.

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Absolute maximum ratings (Ta = 25

°C)

Parameter

Symbol

Limits

Conditions

Unit

Power supply voltage

−0.3~+7.0

V

Maximum input voltage

V

Maximum output voltage

±4.0

mA

Power dissipation

Pd

mW

Operating temperature

Topr

−40~+85

°C

Storage temperature

Tstg

−55~+125

°C

All input pins

All output pins

∗Reduced by 3.5mW for each increase in Ta of 1°C over 25°C.

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Recommended operating conditions (Ta = 25

°C)

Parameter

4.5

5.5

V

−

Power supply voltage

4.5

5.5

V

−

Symbol

Min.

Typ.

Max.

Unit