UPC2539GS NEC, UPC2539GS Datasheet - Page 6

• Manufacturer Part Number: UPC2539GS
• Description: RDS DATA DEMODULATOR IC
• Manufacturer: NEC

APPLICATION CIRCUIT ESAMPLE
6
Notes 1.
2.
Pin 7 does not have ability enough to drive LED directly because of internal serial resistor (10k ) 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 V
Crystal oscillation frequency tolerance : 100ppm
V
CC
=+5V
100 F +
0.1 F
S K detector block
24
0.1 F
0.1 F
1
DIFFERENTIAL
DECODER
BIPHASE
COSTAS
DECODER
23
2
PLL block
22
3
The equivalent circuit in pin 7
4700pF
21
4
INPUT
RECOVERY
20
5
CLOCK
57kHz BPF
DD
.
19
6
0.1 F
10k
18
4700pF
7
SK DET
17
8
RDS
+5V
16
7
9
RBDS
*1
15
10
22pF
+5V
14
11
OPERATE
STOP
OSC
13
12
22pF
4.332MHz
*2
PC2539