FEMTOCLOCK
®
CRYSTAL-TO-
3.3V, 2.5V LVPECL CLOCK GENERATOR
843031I-01 DATA SHEET
4 REVISION A 10/15/15
TABLE 5. CRYSTAL CHARACTERISTICS
TABLE 6A. AC CHARACTERISTICS, V
CC
= 3.3V±5%, TA = -40°C TO 85°C
TABLE 6B. AC CHARACTERISTICS, V
CC
= 2.5V±5%, TA = -40°C TO 85°C
TABLE 4D. LVPECL DC CHARACTERISTICS, V
CC
= 3.3V±5% OR 2.5V±5%, TA = -40°C TO 85°C
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
OH
Output High Voltage; NOTE 1 V
CC
- 1.4 V
CC
- 0.9 V
V
OL
Output Low Voltage; NOTE 1 V
CC
- 2.0 V
CC
- 1.7 V
V
SWING
Peak-to-Peak Output Voltage Swing 0.6 1.0 V
NOTE 1: Outputs terminated with 50Ω to V
CC
- 2V.
Parameter Test Conditions Minimum Typical Maximum Units
Mode of Oscillation Fundamental
Frequency 22.4 25 27.2 MHz
Equivalent Series Resistance (ESR) 40
Ω
Shunt Capacitance 7pF
Drive Level 300 mW
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency 280 312.5 340 MHz
tjit(Ø)
RMS Phase Jitter ( Random);
NOTE 1
312.5MHz @ Integration Range:
1.875MHz - 20MHz
0.46 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 150 500 ps
odc Output Duty Cycle 48 52 %
NOTE: Electrical parameters are guaranteed over the specifi ed ambient operating temperature range, which is established
when the device is mounted in a test socket with maintained transverse airfl ow greater than 500 lfpm. The device will meet
specifi cations after thermal equilibrium has been reached under these conditons.
NOTE 1: Please refer to the Phase Noise Plots following this section.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency 280 312.5 340 MHz
tjit(Ø)
RMS Phase Jitter ( Random);
NOTE 1
312.5MHz @ Integration Range:
1.875MHz - 20MHz
0.48 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 150 500 ps
odc Output Duty Cycle 48 52 %
NOTE: Electrical parameters are guaranteed over the specifi ed ambient operating temperature range, which is established
when the device is mounted in a test socket with maintained transverse airfl ow greater than 500 lfpm. The device will meet
specifi cations after thermal equilibrium has been reached under these conditons.
NOTE 1: Please refer to the Phase Noise Plots following this section.
NOTE: It is not recommended to overdrive the crystal input with an external clock.
