ICS843251I-12 Datasheet, PDF (4/12 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS843251I-12
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V
LVPECL CLOCK GENERATOR
TABLE 3D. LVPECL DC CHARACTERISTICS, V_CC = V_CCA = 3.3V±5% OR 2.5V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical
V_OH
Output High Voltage; NOTE 1
V_OL
Output Low Voltage; NOTE 1
V_SWING
Peak-to-Peak Output Voltage Swing
NOTE 1: Outputs terminated with 50Ω to V_CC - 2V.
V_CC - 1.4
V_CC - 2.0
0.6
Maximum
V_CC - 0.9
V_CC - 1.7
1.0
Units
V
V
V
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
Test Conditions
Minimum Typical Maximum
Fundamental
23.2
30
TBD
7
TBD
Units
MHz
Ω
pF
mW
TABLE 5A. AC CHARACTERISTICS, V_CC = V_CCA = 3.3V±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
F_SEL = 1
F_SEL = 0
312.5MHz @ Integration Range:
1.875MHz - 20MHz
20% to 80%
NOTE 1: Please refer to the Phase Noise Plots following this section.
Minimum
Typical
312.5
625
Maximum
Units
MHz
MHz
0.36
ps
325
ps
50
%
TABLE 5B. AC CHARACTERISTICS, V_CC = V_CCA = 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
F_SEL = 1
F_SEL = 0
312.5MHz @ Integration Range:
1.875MHz - 20MHz
20% to 80%
NOTE 1: Please refer to the Phase Noise Plots following this section.
Minimum
Typical
312.5
625
Maximum
Units
MHz
MHz
0.38
ps
325
ps
50
%
843251BGI-12
www.icst.com/products/hiperclocks.html
4
REV. A JANUARY 10, 2006