
ICS813078I
FEMTOCLOCKS VCXO-PLL FREQUENCY GENERATOR
FEMTOCLOCKS VCXO-PLL FREQUENCY GENERATOR
11
ICS813078BYI REV. A OCTOBER 6, 2008
NOTE: TA, Ambient Temperature applied using forced air flow.
NOTE 1: Phase jitter measured using a 30.72MHz quartz crystal.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at the output differential
cross points.
NOTE 4: Defined as skew within a bank of outputs at the same voltage and with equal load conditions.
Φ
N
Single-Side
Band Noise at:
QAn = 61.44MHz
10Hz offset
30.72MHz XTAL,
fref = 30.72MHz,
QBn and QCn = 61.44MHz
-44.6
dBc/Hz
100Hz offset
-77.2
dBc/Hz
1kHz offset
-106.4
dBc/Hz
10kHz offset
-132.8
dBc/Hz
100kHz offset
-132.9
dBc/Hz
1MHz offset
-137.9
dBc/Hz
tsk(o)
Output Skew
NOTE 2, 3
fQA = fQB
across QAn and QBn
200
ps
fQA ≠ fQB
across QAn and QBn
300
ps
tsk(b)
Bank Skew;
NOTE 2, 4
QAn/nQAn
50
ps
QBn/nQBn
50
ps
QCn
65
ps
tR / tF
Output
Rise/ Fall Time
QAn/nQAn
20% to 80%
100
600
ps
QBn/nQBn
20% to 80%
100
600
ps
QCn
20% to 80%
350
1050
ps
odc
Output
Duty Cycle
QAn/nQAn
47
53
%
QBn/nQBn
N
≠ 147
53
%
QBn/nQBn
N = 1
43
57
%
QCn
45
55
%
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units