
IDT / ICS 3.3V LVPECL FREQUENCY SYNTHESIZER
7
ICS843004AG-02 REV A JULY 30, 2007
ICS843004-02
CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
t
PW
t
PERIOD
t
PW
t
PERIOD
odc =
x 100%
Q0:Q3
RMS PHASE JITTER
OUTPUT SKEW
3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
SCOPE
Qx
nQx
LVPECL
2V
-1.3V±0.165V
OUTPUT RISE/FALL TIME
Clock
Outputs
20%
80%
20%
tR
t F
VSWING
V
CC,
V
CCO
V
EE
nQ0:nQ3
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
tsk(o)
Qy
Qx
nQy
nQx
Phase Noise Mask
Offset Frequency
f
1
f
2
Phase Noise Plot
RMS Jitter = Area Under the Masked Phase Noise Plot
Noise
P
o
w
er
V
CCA
2V