PRELIMINARY
ICS843251I-12
Integrated
Circuit
Systems, Inc.
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V
LVPECL CLOCK GENERATOR
PARAMETER MEASUREMENT INFORMATION
2V
2V
SCOPE
SCOPE
VCC,
VCCA
VCC,
VCCA
Qx
Qx
LVPECL
VEE
LVPECL
VEE
nQx
nQx
-1.3V 0.165V
-0.5V 0.125V
LVPECL 3.3V OUTPUT LOAD AC TEST CIRCUIT
LVPECL 2.5V OUTPUT LOAD AC TEST CIRCUIT
Phase Noise Plot
nQ
Q
Phase Noise Mask
tPW
tPERIOD
tPW
tPERIOD
Offset Frequency
f1
f2
odc =
x 100ꢀ
RMS Jitter = Area Under the Masked Phase Noise Plot
RMS PHASE JITTER
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
80ꢀ
tF
80ꢀ
tR
VSWING
20ꢀ
Clock
Outputs
20ꢀ
OUTPUT RISE/FALL TIME
843251BGI-12
www.icst.com/products/hiperclocks.html
REV.A JANUARY 10, 2006
6