FEMTOCLOCKS™ CRYSTAL-TO-LVDS
CLOCK GENERATOR
844021-01 DATA SHEET
4 REVISION A 10/26/15
TABLE 4. CRYSTAL CHARACTERISTICS
TABLE 5. AC CHARACTERISTICS, V
DD
= 3.3V±5% OR 2.5V±5%, TA = 0°C TO 70°C
TABLE 3E. LVDS DC CHARACTERISTICS, V
DD
= 2.5V±5%, TA = 0°C TO 70°C
TABLE 3D. LVDS DC CHARACTERISTICS, V
DD
= 3.3V±5%, TA = 0°C TO 70°C
Parameter Test Conditions Minimum Typical Maximum Units
Mode of Oscillation Fundamental
Frequency 24.5 34 MHz
Equivalent Series Resistance (ESR) 50
Ω
Shunt Capacitance 7pF
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency 122.5 170 MHz
tjit(Ø)
RMS Phase Jitter ( Random);
NOTE 1
125MHz @ Integration Range:
1.875MHz - 20MHz
0.32 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 200 400 ps
odc Output Duty Cycle 48 52 %
NOTE 1: Please refer to the Phase Noise Plots following this section.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
OD
Differential Output Voltage 215 430 mV
Δ V
OD
V
OD
Magnitude Change 50 mV
V
OS
Offset Voltage 1.05 1.45 V
Δ V
OS
V
OS
Magnitude Change 50 mV
NOTE: Please refer to Parameter Measurement Information for output information.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
OD
Differential Output Voltage 275 425 mV
Δ V
OD
V
OD
Magnitude Change 50 mV
V
OS
Offset Voltage 1.15 1.45 V
Δ V
OS
V
OS
Magnitude Change 50 mV
NOTE: Please refer to Parameter Measurement Information for output information.
NOTE: It is not recommended to overdrive the crystal input with an external clock.
