ICS844008I Datasheet, PDF (4/18 Pages) Integrated Device Technology – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

ICS844008I-01
FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
NOTE: Characterized using an18pF parallel resonant crystal.
Minimum Typical Maximum
Fundamental
25
50
5
Units
MHz
Ω
pF
TABLE 6. AC CHARACTERISTICS, V_DD = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum Units
f_OUT
Output Frequency
FSEL = 0
FSEL = 1
156.25
125
MHz
MHz
tsk(o) Output Skew; NOTE 1, 2
110
ps
tjit(cc) Cycle-to-Cycle Jitter
25
ps
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 3
125MHz, (1.875MHz - 20MHz)
156.25MHz, (1.875MHz - 20MHz)
0.38
0.42
ps
ps
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
300
47
700
ps
53
%
NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established
when the device is mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet
specifications after thermal equilibrium has been reached under these conditons.
NOTE 1: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at the differential cross points.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Please refer to the Phase Noise Plot.
IDT^™ / ICS^™ LVDS FREQUENCY SYNTHESIZER
4
ICS844008AYI-01 REV. B NOVEMBER 21, 2008