ICS843N252-45 Datasheet, PDF (4/16 Pages) Integrated Device Technology – Fourth generation FemtoClock

ICS843N252-45 Data Sheet
FEMTOCLOCK^® CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
Table 4C. LVPECL DC Characteristics, V_CC = 3.3V ± 5%, V_EE = 0V, T_A = 0°C to 70°C
Symbol Parameter
Test Conditions
Minimum
V_OH
V_OL
V_SWING
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
V_CC – 1.4
V_CC – 2.0
0.55
NOTE 1: Output termination with 50Ω to V_CC – 2V.
Typical
Maximum
V_CC – 0.75
V_CC – 1.5
1.05
Units
V
V
V
Table 5. Crystal Characteristics
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Test Conditions
Minimum
Typical Maximum
Fundamental
25
50
7
Units
MHz
Ω
pF
AC Electrical Characteristics
Table 6. AC Characteristics, V_CC = V_CCOA = 3.3V ± 5%, V_EE = 0V, T_A = 0°C to 70°C
Symbol Parameter
Test Conditions
Minimum
f_OUT
Output Frequency
QA
QB, nQB
tjit(Ø)
RMS Phase Jitter
(Random); NOTE 1
QA
QB, nQB
125MHz, Integration Range:
12kHz – 20MHz
156.25MHz, Integration Range:
12kHz – 20MHz
PSNR Power Supply Noise Reduction
From DC to 10MHz
QA
20% to 80%
250
t_R / t_F
Output Rise/Fall Time
QB, nQB
20% to 80%
150
QA
47
odc
Output Duty Cycle
QB, nQB
48
Typical
125
156.25
0.39
0.33
-60
Maximum
500
300
53
52
Units
MHz
MHz
ps
ps
dB
ps
ps
%
%
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 conditions.
NOTE: Using a 25MHz, 12pF quartz crystal.
NOTE 1: Please refer to the Phase Noise plots.
ICS843N252GG-45 REVISION A JULY 6, 2011
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©2011 Integrated Device Technology, Inc.