
ICS650-44
SPREAD SPECTRUM CLOCK SYNTHESIZER
CLOCK SYNTHESIZER
IDT / ICS SPREAD SPECTRUM CLOCK SYNTHESIZER
6
ICS650-44
REV E 051310
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, VDDO = 2.5 V ±5%, Ambient Temperature -40 to +85
° C
Note 1: Measured with 5 pF load.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Input Frequency
FIN
Crystal or clock input
25
MHz
Spread Spectrum Modulation
Frequency
50
kHz
Duty Cycle
t2/t1
At VDD/2, Note 1 and
Figures 1 and 2
45
50
55
%
Output Fall Time
t3
80% to 20%, Note 1
and Figures 1 & 3
1.5
ns
Output Rise Time
t4
20% to 80%, Note 1
and Figures 1 & 3
1.5
ns
One Sigma Clock Period Jitter
Note 1
30
ps
Absolute Jitter, Peak-to-Peak
tja
Deviation from mean,
Note1 & Figures 1 and
6
±125
ps
Output Enable Time
tEN
PDTS high to PLL
locked to within 1% of
final value, Figure 5
2.5
5
ms
Output Disable Time
tDIS
PDTS low to tri-state,
Figure 5
20
ns
Output-to-Output Skew
±180
ps
Power-up Time
tP
PLL lock-time from
power-up to 1% of final
value, Figure 4
610
ms