MB1507 Fujitsu Microelectronics, Inc., MB1507 Datasheet - Page 6

• Manufacturer Part Number: MB1507
• Description: Serial Input PLL Frequency Synthesizer
• Manufacturer: Fujitsu Microelectronics, Inc.

6
MB1507
PHASE CHARACTERISTICS
FC pin is provided to change phase polarity of phase comparator. Characteris-
tics of internal charge pump output level (D
(ØR, ØP) are reversed depending upon FC pin input level. Also, monitor pin
(f
Depending upon VCO polarity, FC pin should be set accordingly:
When VCO polarity are like
When VCO polarity are like
NOTES: Parenthesis data is used for setting divide ratio of programmable reference divider.
out
Note:
) output level of phase comparator is controlled by FC pin input level.
f
f
f
r
r
r
>f
=f
<f
Clock
On rising edge of clock shifts one bit of data into the shift register.
Z=(High impedance)
p
p
p
Data
LE
t
1
, t
S19=MSB
2
D
H
, t
Z
L
O
*(SW)
3
, t
FC=H or open
1
2
4
ØR
, t
H
L
L
, FC should be set High or open circuit;
, FC should be set Low.
5
1 s
t
S18
ØP
1
(S14)
Z
Z
L
O
f
(f
(f
(f
out
), phase comparator output level
r
r
r
)
)
)
D
H
Z
L
SERIAL DATA INPUT TIMING
O
ØR
H
L
L
FC=L
(S7)
ØP
Z
Z
L
S11
t
2
f
(f
(f
(f
S10
out
p
p
p
(S6)
)
)
)
VCO POLARITY
t
3
S1=LSB
VCO INPUT VOLTAGE
(S1)
(C: CONTROL BIT)
C: CONTROL BIT
t
t
4
5
1
2