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S5T8808A01-R0B0 Datasheet(PDF) 10 Page - Samsung semiconductor

Part # S5T8808A01-R0B0
Description  PLL FREQUENCY SHNTHESIZER FOR PAGER
PDF  12 Pages
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Manufacturer  SAMSUNG [Samsung semiconductor]
Direct Link  http://www.samsung.com/Products/Semiconductor
Logo SAMSUNG - Samsung semiconductor

S5T8808A01-R0B0 Datasheet(HTML) 10 Page - Samsung semiconductor

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S5T8808A
PLL FREQUENCY SHNTHESIZER FOR PAGE
10
The architecture of R-Count Divider
Figure 4. R-CNT architecture
VCO output Frequency
fVCO = N x fVCO / RD
fVCO = VCO output frequency
fOSC = X-tal Oscillator Frequency
RD = Programmable Reference R-counter value
N = Programmable N-counter value
Phase Detector / Lock Detector
Figure 5. Phase Detector / Lock Detector Block Diagram
12.8MHz
X-Tal
OSCI
OSCO
1 / 4
Prescaler
FRC
14 bits
Counter
12.8MHz
3.2MHz
D0 ------------- D13
Fr
6.25KHz
1/ 4
CNT
14 Bit
R - Divider
Phase
Detector
OSCI
OSCO
Fin
Fr
Fn
PDP
PDA
FRC
1
2
Lock
Detector
LD
10
7
FN
14
4
5
FR
15
4 / 5
Counter
14 Bit
N - Divider
2 bits
Swallow
Counter
16 Bit Programmabel N_Counter



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