843022I-02 Datasheet, PDF (4/17 Pages) Integrated Device Technology – FemtoClock® Crystal-to-3.3V, 2.5V LVPECL Clock Generator

843022I-02 DATA SHEET
TABLE 4D. LVPECL DC CHARACTERISTICS, V = V = 3.3V±5% OR 2.5V±5%, V = 0V, TA = -40°C TO 85°C
CC
CCO
EE
Symbol Parameter
V
Output High Voltage; NOTE 1
OH
V
Output Low Voltage; NOTE 1
OL
V
SWING
Peak-to-Peak Output Voltage Swing
NOTE 1: Outputs terminated with 50Ω to V - 2V.
CCO
Test Conditions
Minimum
V - 1.4
CCO
V - 2.0
CCO
0.6
Typical
Maximum
V - 0.9
CCO
V - 1.7
CCO
1.0
Units
V
V
V
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Minimum Typical Maximum
Mode of Oscillation
Fundamental
Frequency
25
Equivalent Series Resistance (ESR)
50
Shunt Capacitance
7
NOTE: It is not recommended to overdrive the crystal input with an external clock.
Units
MHz
Ω
pF
TABLE 6A. AC CHARACTERISTICS, V = V = 3.3V±5%, V = 0V, TA = -40°C TO 85°C
CC
CCO
EE
Symbol Parameter
Test Conditions
f
Output Frequency
OUT
F_SEL = 0
F_SEL = 1
tjit(Ø)
RMS Phase Jitter;
NOTE 1
125MHz,
Integration Range: 12kHz - 20MHz
62.5MHz,
Integration Range: 12kHz - 10MHz
t /t
RF
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
NOTE 1: Please refer to the Phase Noise Plot.
Minimum
Typical
125
62.5
Maximum
Units
MHz
MHz
0.57
ps
0.52
ps
200
700
ps
47
53
%
TABLE 6B. AC CHARACTERISTICS, V = V = 2.5V±5%, V = 0V, TA = -40°C TO 85°C
CC
CCO
EE
Symbol Parameter
Test Conditions
f
Output Frequency
OUT
F_SEL = 0
F_SEL = 1
tjit(Ø)
RMS Phase Jitter;
NOTE 1
125MHz,
Integration Range: 12kHz - 20MHz
62.5MHz,
Integration Range: 12kHz - 10MHz
t /t
RF
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
NOTE 1: Please refer to the Phase Noise Plot.
Minimum
Typical
125
62.5
Maximum
Units
MHz
MHz
0.62
ps
0.60
ps
200
700
ps
47
53
%
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V
4
LVPECL CLOCK GENERATOR
REVISION A 11/4/15