ICS291 Datasheet, PDF (6/8 Pages) Integrated Circuit Systems – Triple PLL Field Prog. Spread Spectrum Clock Synthesizer

PRELIMINARY INFORMATION
ICS291
Triple PLL Field Prog. Spread Spectrum Clock Synthesizer
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature -40 to +85° C
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Input Frequency
F_IN Fundamental crystal
5
Clock input
3
27 MHz
166 MHz
Output Frequency
VDDO=VDD
0.314
200 MHz
1.8 V<VDDO<2.8 V
0.314
150 MHz
Output Rise/Fall Time
t_OF 80% to 20%, high drive,
1.0
ns
Note 1
Output Rise/Fall Time
t_OF 80% to 20%, low drive,
2.0
ns
Note 1
Output Rise/Fall Time
t_OF 80% to 20%, high drive,
2.0
ns
1.8 V<VDDO<2.8
Note 2
Duty Cycle
Note 2
40 49-51 60
%
Output Frequency Synthesis Error
Configuration Dependent
TBD
ppm
Power-up time
PLL lock-time from
power-up
4
10 ms
PDTS goes high until
stable CLK output,
Spread Spectrum Off
0.6 2
ms
PDTS goes high until
stable CLK output,
Spread Spectrum On
4
7
ms
One Sigma Clock Period Jitter
Configuration Dependent
50
ps
Maximum Absolute Jitter
t_ja
Deviation from Mean.
+200
ps
Configuration Dependent
Pin-to-Pin Skew
Low Skew Outputs
-250
250 ps
Note 1: Measured with 15 pF load.
Note 2: Duty Cycle is configuration dependent. Most configurations are min 45% / max 55%.
Thermal Characteristics
Parameter
Symbol Conditions
Thermal Resistance Junction to
Ambient
θ_JA Still air
θ_JA 1 m/s air flow
θ_JA 3 m/s air flow
Thermal Resistance Junction to Case θ_JC
Min.
Typ.
93
78
65
20
Max.
Units
°C/W
°C/W
°C/W
°C/W
MDS 291 C
6
Revision 062205
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