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Fujitsu MB15F74UL Datasheet page 10

Dual serial input pll frequency synthesizer
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MB15F74UL
Prescaler Data Setting
Divide ratio
Prescaler divide ratio IF-PLL
Prescaler divide ratio RF-PLL
• Charge Pump Current Setting
Current value
6.0 mA
1.5 mA
LD
fout output Selectable Bit Setting
/
LD/fout pin state
LD output
fr
IF
fr
fout
RF
output
fp
fp
RF
Phase Comparator Phase Switching Data Setting
Phase comparator input
fr
fp
fr
fp
fr
fp
Z
High-impedance
:
Depending upon the VCO and LPF polarity, FC bit should be set.
(1) VCO polarity FC
(2) VCO polarity FC
Note : Give attention to the polarity for using active type LPF.
10
SW
"H"
32/33
64/65
CS
1
0
LDS
0
0
0
1
1
1
IF
1
FC
,
"H"
IF
RF
Do
,
IF
RF
H
L
Z
"H"
"L"
SW
"L"
64/65
128/129
T1
T2
0
0
1
0
1
1
0
0
1
0
0
1
1
1
FC
,
"L"
IF
RF
Do
,
IF
RF
L
H
Z
High
VCO Output
Frequency
LPF Output voltage
(1)
(2)
Max

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