ICS840051 Datasheet, PDF (6/10 Pages) Integrated Circuit Systems – FEMTOCLOCK CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
ICS840051
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
PARAMETER MEASUREMENT INFORMATION
1.65V ± 5%
V_DD
LVCMOS
GND
-1.65V ± 5%
SCOPE
Qx
Phase Noise Plot
Phase Noise Mask
f₁ ^{Offset Frequency} f₂
RMS Jitter = Area Under the Masked Phase Noise Plot
3.3V OUTPUT LOAD AC TEST CIRCUIT
RMS PHASE JITTER
V
DD
Q0
2
Pulse Width
t
PERIOD
odc = ^{t PW}
t _PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
20%
Clock
Outputs
80%
t_R
80%
t_F
20%
OUTPUT RISE/FALL TIME
840051AG
www.icst.com/products/hiperclocks.html
6
REV. A JANUARY 14, 2005