ICS843023I Datasheet, PDF (4/13 Pages) Integrated Circuit Systems – FEMTOCLOCKS-TM CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
ICS843023I
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V
LVPECL CLOCK GENERATOR
Test Conditions
Minimum Typical Maximum
Fundamental
24.5
32
50
7
1
Units
MHz
Ω
pF
mW
TABLE 5A. AC CHARACTERISTICS, V_CC = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
f_OUT
tjit(Ø)
Output Frequency
RMS Phase Jitter (Random);
250MHz,
NOTE 1
Integration Range: 1.875MHz - 20MHz
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
NOTE 1: Please refer to the Phase Noise Plot after this section.
Minimum
245
300
47
Typical
0.39
Maximum
320
600
53
Units
MHz
ps
ps
%
TABLE 5B. AC CHARACTERISTICS, V_CC = 2.5V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
f_OUT
tjit(Ø)
t_R / t_F
odc
Output Frequency
RMS Phase Jitter (Random);
NOTE 1
Output Rise/Fall Time
Output Duty Cycle
250MHz,
Integration Range: 1.875MHz - 20MHz
20% to 80%
NOTE 1: Please refer to the Phase Noise Plot after this section.
Minimum
245
300
47
Typical
0.39
Maximum
320
600
53
Units
MHz
ps
ps
%
843023AGI
www.icst.com/products/hiperclocks.html
4
REV. A JUNE 29, 2005