ICS8430252-45 Datasheet, PDF (4/13 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS8430252-45
FEMTOCLOCKS™CRYSTAL-TO-3.3V LVPECL
FREQUENCY SYNTHESIZER
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
NOTE: Characterized using an 18pF parallel resonant crystal.
Minimum Typical Maximum
Fundamental
25
50
7
1
Units
MHz
Ω
pF
mW
TABLE 6. AC CHARACTERISTICS, V_CC = V_CCA = V_{CCO_A,} V_{CCO_B} = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
Minimum
f
Output Frequency Range
OUT
tjit(Ø)
RMS Phase Jitter ^QA
125MHz (1.875MHz - 20MHz)
(Random); NOTE 1 _{QB, nQB 156.25MHz (1.875MHz - 20MHz)}
t_R / t_F
Output
Rise/Fall Time
QA
QB, nQB
20% to 80%
QA
odc
Output Duty Cycle
QB, nQB
NOTE 1: Please refer to the Phase Noise Plots.
Typical
156.25
125
0.41
0.39
775
390
50
50
Maximum
Units
MHz
MHz
ps
ps
ps
ps
%
%
8430252CG-45
www.icst.com/products/hiperclocks.html
4
REV. B DECEMBER 9, 2005