PRELIMINARY
ICS843251I-12
Integrated
Circuit
Systems, Inc.
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V
LVPECL CLOCK GENERATOR
TABLE 3D. LVPECL DC CHARACTERISTICS, VCC = VCCA = 3.3V 5ꢀ OR 2.5V 5ꢀ, TA = -40°C TO 85°C
Symbol
VOH
Parameter
Test Conditions
Minimum
VCC - 1.4
VCC - 2.0
0.6
Typical
Maximum Units
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
VCC - 0.9
VCC - 1.7
1.0
V
V
V
VOL
VSWING
NOTE 1: Outputs terminated with 50Ω to VCC - 2V.
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Minimum
23.2
Typical Maximum Units
Fundamental
Mode of Oscillation
Frequency
30
TBD
7
MHz
Ω
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
pF
TBD
mW
TABLE 5A. AC CHARACTERISTICS, VCC =VCCA = 3.3V 5ꢀ, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
F_SEL = 1
Minimum Typical Maximum Units
312.5
625
MHz
MHz
fOUT
Output Frequency
F_SEL = 0
RMS Phase Jitter ( Random);
NOTE 1
312.5MHz @ Integration Range:
1.875MHz - 20MHz
tjit(Ø)
0.36
ps
tR / tF
odc
Output Rise/Fall Time
Output Duty Cycle
20ꢀ to 80ꢀ
325
50
ps
ꢀ
NOTE 1: Please refer to the Phase Noise Plots following this section.
TABLE 5B. AC CHARACTERISTICS, VCC =VCCA = 2.5V 5ꢀ, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
F_SEL = 1
Minimum Typical Maximum Units
312.5
625
MHz
MHz
fOUT
Output Frequency
F_SEL = 0
RMS Phase Jitter ( Random);
NOTE 1
312.5MHz @ Integration Range:
1.875MHz - 20MHz
tjit(Ø)
0.38
ps
tR / tF
odc
Output Rise/Fall Time
Output Duty Cycle
20ꢀ to 80ꢀ
325
50
ps
ꢀ
NOTE 1: Please refer to the Phase Noise Plots following this section.
843251BGI-12
www.icst.com/products/hiperclocks.html
REV.A JANUARY 10, 2006
4
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
