BU1924 Datasheet, PDF (1/5 Pages) Rohm – RDS / RBDS decoder

Audio ICs
RDS / RBDS decoder
BU1924 / BU1924F
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.
!Applications
RDS / RBDS compatible FM receivers for American and European markets, car stereos, high-fidelity stereo systems and
components, and FM pagers.
!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.
!Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Power supply voltage
Maximum input voltage
Maximum output voltage
Power dissipation
VDD
VMax.
IMax.
Pd
−0.3~+7.0
−0.3~VDD+0.3
±4.0
350^∗
Operating temperature
Topr
−40~+85
Storage temperature
Tstg
−55~+125
∗Reduced by 3.5mW for each increase in Ta of 1°C over 25°C.
Unit
Conditions
V
VDD1 VDD2
V
All input pins
mA
All output pins
mW
−
°C
−
°C
−
!Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Symbol Min. Typ. Max.
Unit
VDD1
4.5
−
5.5
V
VDD2
4.5
−
5.5
V