ICS844252-04 Datasheet, PDF (4/12 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-LVDS CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844252-04
FEMTOCLOCKS™ CRYSTAL-TO-
LVDS CLOCK GENERATOR
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
Test Conditions
Minimum Typical Maximum
Fundamental
19.33
30
50
7
1
Units
MHz
Ω
pF
mW
TABLE 5. AC CHARACTERISTICS, V_DD = V_DDA = V_DDO = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
Minimum Typical
f_OUT
tsk(o)
Output Frequency
Output Skew; NOTE 1, 2
145
TBD
156.25MHz @ Integration Range:
1.875MHz - 20MHz
0.36
tjit(Ø)
RMS Phase Jitter (Random); 159.375MHz @ Integration Range:
NOTE 3
1.875MHz - 20MHz
0.38
187.5MHz @ Integration Range:
1.875MHz - 20MHz
0.38
t_R / t_F
Output Rise/Fall Time
20% to 80%
375
odc
Output Duty Cycle
50
NOTE 1: Defined as skew between outputs at the same supply voltage and with equal load conditions.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Please refer to the Phase Noise Plots following this section.
Maximum
187.5
Units
MHz
ps
ps
ps
ps
ps
%
844252AG-04
www.icst.com/products/hiperclocks.html
4
REV. A JANUARY 26, 2006