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Part Name
Description
BU1924F View Datasheet(PDF) - ROHM Semiconductor
Part Name
Description
Manufacturer
BU1924F
RDS / RBDS decoder
ROHM Semiconductor
BU1924F Datasheet PDF : 5 Pages
1
2
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4
5
Audio ICs
!
Block diagram
BU1924 / BU1924F
MUX
(4)
100k
Ω
270p
120k
Ω
100k
Ω
Vref
(3)
2.2
µ
F
V
DD1
(5)
∗
1
Analog
Power supply
V
SS1
(6)
anti-aliasing
filter
560p
(7)
V
SS3
CMP
(8)
8th Switched
capacitor filter
comparator
(16) RCLK
(1)
QUAL
∗
1
V
DD2
(12)
∗
2
V
SS2
Digital
Power supply
(11)
PLL
57kH
Z
RDS/ARI
Reference
clock
(13)
(14)
XI
XO
4.332MH
Z
33pF
∗
3
33pF
∗
3
PLL
1187.5Hz
Bi-phase
decoder
Differential
decoder
(2)
RDATA
Measurement
circuit
(10)
(9)
T1
T2
∗
1
: V
DD1
and V
DD2
are separated within the IC.
∗
2
: Have V
DD2
(digital power supply) of a sufficiently low impedance.
∗
3
: Match the capacitor constants with the crystal manufacturer.
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9
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