MB15A01 Fujitsu Microelectronics, MB15A01 Datasheet - Page 10

• Manufacturer Part Number: MB15A01
• Description: Bi-cmos 1.1 GHZ PLL Frequency Synthesizer
• Manufacturer: Fujitsu Microelectronics

10
PHASE COMPARATOR OUTPUT WAVEFORMS
LD
Do
Do
fp
R
R
fr
P
P
When the FC bit = “H”
When the FC bit = “L”
Notes:
• A phase difference is detected between -2 and +2 , with gain = Vp/4
• The LD output goes low when it becomes phase between phase difference t
• t
The LD output goes high when it remains equal to or smaller than t
more.
WU
Z
Z
t
When focs = 12.8 MHz: t
t
When fosc = 12.8 MHz: t
WU
WL
and t
16/fosc (s)
8/fosc (s)
WL
t
are determined by the OSC
WU
H
WU
WL
1250 ns
625 ns
t
WL
IN
input frequency as follows:
L
WL
, for three cycles or
WU
or more.
MB15A01