
ICS843251-04
FEMTOCLOCKCRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR
IDT / ICS 3.3V LVPECL CLOCK GENERATOR
3
ICS843S51AG-04 REV. A JANUARY 12, 2009
Table 3B. LVCMOS/LVTTL DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
Table 3C. LVPECL DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
NOTE 1: Outputs termination with 50
to V
CC – 2V.
Table 4. Crystal Characteristics
AC Electrical Characteristics
Table 5. AC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
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 1: Please refer to Phase Noise Plots.
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
VIH
Input High Voltage
2
VCC + 0.3
V
VIL
Input Low Voltage
-0.3
0.8
V
IIH
Input High Current
VCC = VIN = 3.465V
150
A
IIL
Input Low Current
VCC = 3.465V, VIN = 0V
-5
A
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
VOH
Output High Current; NOTE 1
VCC – 1.4
VCC – 0.9
A
VOL
Output Low Current; NOTE 1
VCC – 2.0
VCC – 1.7
A
VSWING
Peak-to-Peak Output Voltage Swing
0.6
1.0
V
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
Mode of Oscillation
Fundamental
Frequency
19.33
30
MHz
Equivalent Series Resistance (ESR)
50
Shunt Capacitance
7pF
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
fOUT
Output Frequency
145
187.5
MHz
tjit()
RMS Phase Jitter, Random;
NOTE 1
156.25MHz,
(Integration Range: 1.875MHz – 20MHz)
0.39
ps
187.5MHz,
(Integration Range: 1.875MHz – 20MHz)
0.40
ps
tR / tF
Output Rise/Fall Time
20% to 80%
285
415
ps
odc
Output Duty Cycle
48
52
%