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UPC2539 Datasheet(PDF) 6 Page - NEC

Part No. UPC2539
Description  RDS DATA DEMODULATOR IC
Download  8 Pages
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Maker  NEC [NEC]
Homepage  http://www.nec.com/
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UPC2539 Datasheet(HTML) 6 Page - NEC

   
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µPC2539
6
APPLICATION CIRCUIT ESAMPLE
Notes 1.
Pin 7 does not have ability enough to drive LED directly because of internal serial resistor (10k
Ω) shown
in following figure. In application for system with no ARI signal such as RBDS in USA, pin 7 is
recommended to be connected with VDD.
2.
Crystal oscillation frequency tolerance :
±100ppm
The equivalent circuit in pin 7
10k
S K detector block
PLL block
7
µ
0.1 F
VCC=+5V
µ
100 F +
µ
0.1 F
INPUT
4700pF
4700pF
+5V
OPERATE
STOP
24
23
22
21
20
19
18
17
16
15
14
13
1
234
5
6
789
10
11
12
µ
0.1 F
COSTAS
BIPHASE
DECODER
DIFFERENTIAL
DECODER
57kHz BPF
SK DET
CLOCK
RECOVERY
OSC
4.332MHz
+5V
RBDS
22pF
22pF
RDS
*1
*2
µ
0.1 F


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