ICS840004I-01 Datasheet, PDF (6/10 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840004I-01
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
1.65V±5%
V_DD,
V_DDA, V_DDO
LVCMOS
GND
2.05V±5% 1.25V±5%
SCOPE
Qx
V_DD,
V_DDA
V_DDO
LVCMOS
GND
SCOPE
Qx
-1.65V±5%
3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
1.25V±5%
-1.25V±5%
3.3V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
Phase Noise Plot
V_DD,
V_DDA, V_DDO
LVCMOS
GND
SCOPE
Qx
-1.25V±5%
2.5V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
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)
20%
Clock
Outputs
80%
t_R
OUTPUT SKEW
Q0:Q3
t _PW
V
DDO
2
t
PERIOD
OUTPUT RISE/FALL TIME
odc = ^{t PW} x 100%
t _PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
840004AGI-01
www.icst.com/products/hiperclocks.html
6
80%
t_F
20%
REV. A JUNE 28, 2005