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ICS843021I-01 Datasheet, PDF (4/15 Pages) Integrated Circuit Systems – FEMTOCLOCKS-TM CRYSTAL-TO-3.3V, 2.5V 125MHZ LVPECL CLOCK GENERATOR
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ICS843021I-01
FEMTOCLOCKS™CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR
Table 3D. LVPECL DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = -40°C to 85°C
Symbol Parameter
Test Conditions
Minimum
VOH
VOL
VSWING
Output High Current; NOTE 1
Output Low Current; NOTE 1
Peak-to-Peak Output Voltage Swing
VCC – 1.4
VCC – 2.0
0.6
NOTE 1: Outputs termination with 50Ω to VCC – 2V.
Typical
Maximum
VCC – 0.9
VCC – 1.7
1.0
Table 3E. LVPECL DC Characteristics, VCC = 2.5V ± 5%, VEE = 0V, TA = -40°C to 85°C
Symbol Parameter
Test Conditions
Minimum
VOH
VOL
VSWING
Output High Current; NOTE 1
Output Low Current; NOTE 1
Peak-to-Peak Output Voltage Swing
VCC – 1.4
VCC – 2.0
0.4
NOTE 1: Outputs termination with 50Ω to VCC – 2V.
Typical
Maximum
VCC – 0.9
VCC – 1.5
1.0
Table 4. Crystal Characteristics
Parameter
Mode of Oscillation
Frequency; NOTE 1
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
Test Conditions
Minimum Typical Maximum
Fundamental
25
90
7
300
Units
µA
µA
V
Units
µA
µA
V
Units
MHz
Ω
pF
µW
AC Electrical Characteristics
Table 5A. AC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = -40°C to 85°C
Parameter Symbol
Test Conditions
fOUT
tjit(Ø)
Output Frequency
RMS Phase Jitter, Random;
NOTE 1
125MHz,
( Integration Range: 1.875MHz – 20MHz)
tR / tF
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
Minimum
122.5
250
49
NOTE 1: Please refer to Phase Noise Plot.
Typical
125
0.41
Maximum Units
160
MHz
ps
600
ps
51
%
Table 5B. AC Characteristics, VCC = 2.5V ± 5%, VEE = 0V, TA = -40°C to 85°C
Parameter Symbol
Test Conditions
fOUT
tjit(Ø)
Output Frequency
RMS Phase Jitter, Random;
NOTE 1
125MHz,
( Integration Range: 1.875MHz – 20MHz)
tR / tF
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
Minimum
122.5
250
49
NOTE 1: Please refer to Phase Noise Plot.
Typical
125
0.42
Maximum Units
160
MHz
ps
600
ps
51
%
IDT™ / ICS™ 3.3V , 2.5V LVPECL CLOCK GENERATOR
4
ICS843021AGI-01 REV. A DECEMBER 3, 2007
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