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.
!
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
Power supply voltage
Maximum input voltage
Maximum output voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
DD
V
Max.
I
Max.
Pd
Topr
Tstg
Limits
−0.3~+7.0
−0.3~V
DD
+0.3
±4.0
350
∗
−40~+85
−55~+125
Unit
V
V
mA
mW
°C
°C
Conditions
V
DD1
V
DD2
All input pins
All output pins
−
−
−
∗Reduced
by 3.5mW for each increase in Ta of 1°C over 25°C.
!
Recommended operating conditions
(Ta = 25°C)
Parameter
Power supply voltage
Symbol
V
DD1
V
DD2
Min.
4.5
4.5
Typ.
−
−
Max.
5.5
5.5
Unit
V
V
ROHM [ ROHM ]
