MB1504L Fujitsu Microelectronics, Inc., MB1504L Datasheet - Page 7

• Manufacturer Part Number: MB1504L
• Description: Assp Serial Input PLL Frequency Synthesizer
• Manufacturer: Fujitsu Microelectronics, Inc.

The FC pin (pin 12) is provided to inverse the phase comparator characteristics.
The characteristics of the internal charge pump output (D
On the rising edge of the clock, one bit of the data shifts into the shift registers.
PHASE CHARACTERISTICS
outputs (ØR, ØP) can be inversed depending upon the FC input data. Outputs
are shown below.
Depending upon VCO characteristics, FC pin should be set accordingly:
When VCO characteristics are like
When VCO characteristics are like
Data in ( ) is used for setting the divide ratio of the programmable reference divider.
Note:
f
f
f
r
r
r
>f
<f
=f
Clock
Z=(High impedance)
p
p
p
Data
LE
t
1
S18=MSB
– t
*(SW)
5
D
H
Z
L
O
t
FC=H (or open)
1
1 s
ØR
(S14)
H
L
L
S17
1
2
, FC should be set high or open circuit;
, FC should be set Low.
ØP
Z
Z
L
SERIAL DATA INPUT TIMING
D
H
L
Z
O
O
), and phase detector
FC=L
ØR
t
H
L
L
2
S10
(S8) (S7)
ØP
Z
Z
L
S9
VCO CHARACTERISTICS
t
3
S1=LSB
VCO INPUT VOLTAGE
(S1)
(C: Control bit)
C: Control bit
t
4
t
5
1
2
MB1504H
MB1504L
MB1504
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