ICS843021I-01 Datasheet, PDF (6/14 Pages) Integrated Circuit Systems – FEMTOCLOCKS-TM CRYSTAL-TO-3.3V, 2.5V 125MHZ LVPECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS843021I-01
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V
125MHZ LVPECL CLOCK GENERATOR
PARAMETER MEASUREMENT INFORMATION
2V
V_CC
LVPECL
V_EE
-1.3V ± 0.165V
SCOPE
Qx
nQx
2V
V_CC
LVPECL
V_EE
-0.5V ± 0.125V
SCOPE
Qx
nQx
3.3V OUTPUT LOAD AC TEST CIRCUIT
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
RMS PHASE JITTER
Clock
20%
Outputs
80%
t_R
OUTPUT RISE/FALL TIME
nQ0
Q0
Pulse Width
t
PERIOD
odc = ^{t PW}
t _PERIOD
80%
t_F
V_{SW I N G}
20%
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
843021AGI-01
www.icst.com/products/hiperclocks.html
6
REV. A NOVEMBER 30, 2004