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ICS840004I-01 Datasheet, PDF (9/16 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER
ICS840004I-01
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
1.65V±5%
VDDA = 1.65V±5%
2.05V±5%
VDDA = 2.05V±5%
1.25V±5%
VDD,
VDDO
LVCMOS
GND
SCOPE
Qx
VDD
VDDO
LVCMOS
GND
SCOPE
Qx
-1.65V±5%
3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
1.25V±5%
VDDA = 1.25V±5%
V,
DD
VDDO
LVCMOS
SCOPE
Qx
GND
-1.25V±5%
2.5V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
-1.25V±5%
3.3V CORE/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
V
DDO
Qx
2
V
DDO
Qy
2
t sk(o)
OUTPUT SKEW
Q0:Q3
t PW
V
DDO
2
t
PERIOD
odc = t PW x 100%
t PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
840004AGI-01
20%
Clock
Outputs
80%
tR
OUTPUT RISE/FALL TIME
80%
tF
20%
9
REV. A OCTOBER 22, 2007