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