MB90610A Series
4. AC Characteristics
(1) Clock Timing
• When VCC = +5.0 V±10%
(VCC = +4.5 V to +5.5 V, VSS = 0.0 V, TA = –40°C to +85°C)
Value
Sym-
Parameter
bol
Pin name Conditions
Unit
Remarks
Min.
3
Max.
32
Clock frequency
Clock cycle time
fC
tC
X0, X1
X0, X1
—
—
MHz
ns
31.25
333
Frequency variation ratio*
(when locked)
∆f
—
—
—
—
3
%
The duty ratio
should be in the
range 30 to 70%
PWH
PWL
Input clock pulse width
X0
10
—
ns
Input clock rise time and
fall time
tcr
tcf
X0
—
—
—
—
—
—
1.5
5
ns
MHz
ns
Internal operating clock
frequency
fCP
16
Internal operating clock
cycle time
tCP
62.5
666
* : The frequency variation ratio is the maximum variation from the specified central frequency when the multiplier
PLL is locked. The value is expressed as a proportion.
+α
α
Central frequency f0
∆f =
× 100 (%)
f0
-α
• When VCC = +2.7 V (min.)
(VCC = +2.7 V to +5.5 V, VSS = 0.0 V, TA = –40°C to +85°C)
Value
Sym-
bol
Parameter
Clock frequency
Pin name Conditions
Unit
Remarks
Min.
3
Max.
16
fC
X0, X1
X0, X1
—
—
MHz
ns
Clock cycle time
tC
62.5
333
The duty ratio
should be in the
range 30 to 70%
PWH
PWL
Input clock pulse width
X0
—
20
—
ns
Input clock rise time and
fall time
tcr
tcf
X0
—
—
—
—
—
—
1.5
125
5
8
ns
MHz
ns
Internal operating clock
frequency
fCP
Internal operating clock
cycle time
tCP
666
50
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