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MB15F78UL Datasheet, PDF (10/27 Pages) Fujitsu Component Limited. – Dual Serial Input PLL Frequency Synthesizer | |||
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MB15F78UL
⢠Prescaler Data Setting
Divide ratio
Prescaler divide ratio TX-PLL
Prescaler divide ratio RX-PLL
SW = âHâ
16/17
32/33
SW = âLâ
32/33
64/65
⢠Charge Pump Current Setting
Current value
CS
±6.0 mA
1
±1.5 mA
0
⢠LD/fout output Selectable Bit Setting
LD/fout pin state
LDS
T1
T2
0
0
0
LD output
0
1
0
0
1
1
frTX
1
0
0
fout
frRX
1
1
0
output
fpTX
1
0
1
fpRX
1
1
1
⢠Phase Comparator Phase Switching Data Setting
Phase comparator input
FC = âHâ
DoTX/DoRX
fr > fp
H
fr < fp
L
fr = fp
Z
Z : High-impedance
FC = âLâ
DoTX/DoRX
L
H
Z
Depending upon the VCO and LPF polarity, FC bit should be set.
(1) VCO polarity FC = âHâ
(2) VCO polarity FC = âLâ
High
VCO Output
Frequency
Note : Give attention to the polarity for using active type LPF.
10
(1)
LPF Output voltage
(2)
Max.
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