843031 REVISION A 11/5/15 4 ©2015 Integrated Device Technology, Inc.
843031 Data Sheet FEMTOCLOCK
®
CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter Test Conditions Minimum Typical Maximum Units
Mode of Oscillation Fundamental
Frequency 12 40 MHz
Equivalent Series Resistance (ESR) 50
Ω
Shunt Capacitance 7pF
Drive Level 1mW
TABLE 5. AC CHARACTERISTICS, V
CC
= 3.3V±5%, TA=0°C TO 70°C
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency 290 350 MHz
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 1
312.5MHz, Integration Range:
1.875MHz to 20MHz
0.475 ps
318.75MHz, Integration Range:
1.875MHz to 20MHz
0.475 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 200 600 ps
odc Output Duty Cycle 46 54 %
NOTE 1: Please refer to the Phase Noise Plot.
