ICS843251I-12 Datasheet, PDF (6/12 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS843251I-12
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V
LVPECL CLOCK GENERATOR
PARAMETER MEASUREMENT INFORMATION
2V
V_CC,
V_CCA
LVPECL
V_EE
-1.3V ± 0.165V
SCOPE
Qx
nQx
2V
V_CC,
V_CCA
LVPECL
V_EE
-0.5V ± 0.125V
SCOPE
Qx
nQx
LVPECL 3.3V OUTPUT LOAD AC TEST CIRCUIT
LVPECL 2.5V OUTPUT LOAD AC TEST CIRCUIT
Phase Noise Plot
Phase Noise Mask
f₁ ^{Offset Frequency} f₂
RMS Jitter = Area Under the Masked Phase Noise Plot
nQ
Q
t _PW
t
PERIOD
odc = ^{t PW} x 100%
t _PERIOD
RMS PHASE JITTER
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
Clock
20%
Outputs
80%
t_R
OUTPUT RISE/FALL TIME
843251BGI-12
80%
t_F
V_{SW I N G}
20%
www.icst.com/products/hiperclocks.html
6
REV. A JANUARY 10, 2006