ICS8431-11 Datasheet, PDF (5/13 Pages) Integrated Circuit Systems – 255MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Frequency Tolerance
Frequency Stability
Drive Level
Equivalent Series Resistance (ESR)
Shunt Capacitance
Load Capacitance
Series Pin Inductance
Operating Temperature Range
Aging
ICS8431-11
255MHZ, LOW JITTER,
LVPECL FREQUENCY SYNTHESIZER
Test Conditions
Per year @25°C
Minimum Typical Maximum
Fundamental
16.0
-50
+50
-100
+100
100
50
3
7
10
18
32
3
7
0
70
-5
+5
Units
MHz
ppm
ppm
µW
Ω
pF
pF
nH
°C
ppm
TABLE 6. AC CHARACTERISTICS, VDD = VDDA = VDDI = VDDO = 3.3V±5%, TA = 0°C TO 85°C, 16MHZ CRYSTAL
Symbol
Fave
tjit(cc)
Parameter
Average Output Frequency; NOTE 4
Cycle-to-Cycle Jitter; NOTE 2
Test Conditions
FOUT = 200 MHz
odc
Output Duty Cycle; NOTE 2
tR
Output Rise Time; NOTE 1, 2
20% to 80%
tF
Output Fall Time; NOTE 1, 2
20% to 80%
Fxtal
Crystal Input Range; NOTE 3
Fm
SSC Modulation Frequency;
NOTE 1, 2
Fmf
SSC Modulation Factor;
NOTE 1, 2
SSCred Spectral Reduction; NOTE 1, 2
tSTABLE Power-up to Stable Clock Output
NOTE 1: Spread Spectrum clocking enabled.
NOTE 2: Outputs terminated with 50Ω to VDDO - 2V.
NOTE 3: Only valid within the VCO operating range.
NOTE 4: Without external crystal components.
tjit(cc), tR, tF, odc conform to JEDEC JESD65 definitions.
Minimum
-750
47
300
300
14
30
Typical
18
450
450
16
Maximum
+750
30
35
53
600
600
20
Units
ppm
ps
ps
%
ps
ps
MHz
33.33
KHz
0.4
0.6
%
7
10
dB
10
ms
ICS8431CM-11
www.icst.com/products/hiperclocks.html
5
REV. A JULY 11, 2001