FEMTOCLOCKS™ CRYSTAL/LVCMOS-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
843004I-04 DATA SHEET
4 REVISION A 5/27/15
TABLE 6. AC CHARACTERISTICS, V
CC
= V
CCA
= V
CCO
= 3.3V±5%, TA = -40°C TO 85°C
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter Test Conditions Minimum Typical Maximum Units
Mode of Oscillation Fundamental
Frequency 17.5 21.25 MHz
Equivalent Series Resistance (ESR) 50
Ω
Shunt Capacitance 7pF
Drive Level 1mW
NOTE: Characterized using an 18pF parallel resonant crystal.
Symbol
Parameter Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency
Output Divider = ÷1 560 680 MHz
Output Divider = ÷4 140 170 MHz
tsk(o) Output Skew; NOTE 1, 2, 3 75 ps
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 4
155.52MHz,
Integration Range: 12kHz - 20MHz
0.94 ps
156.25MHz,
Integration Range: 1.875MHz - 20MHz
0.57 ps
622.08MHz,
Integration Range: 12kHz - 20MHz
82 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 175 675 ps
odc Output Duty Cycle
Output Divider = ÷4 48 52 %
Output Divider = ÷1 40 60 %
NOTE 1: Defi ned as skew between outputs at the same supply voltages and with equal load conditions.
Measured at V
CCO
/2.
NOTE 2: This parameter is defi ned in accordance with JEDEC Standard 65.
NOTE 3: Output skew measurements taken with all outputs in the same divide confi guration.
NOTE 4: Please refer to the Phase Noise Plot.
