ICS149317 Datasheet, PDF (6/11 Pages) Integrated Circuit Systems – Clock Synthesizer for Portable Systems

PRELIMINARY INFORMATION
ICS1493-17
Clock Synthesizer for Portable Systems
AC Electrical Characteristics
Unless stated otherwise, VDDO = 1.8 V ±0.1 V, Ambient Temperature -10°C to +80°C
Parameter
Symbol Conditions
Min. Typ.
Input Frequency
Output Rise Time
Output Fall Time
Output Impedance
Output Clock Duty Cycle
f_IN
27
t_OR 20% to 80%, Note 1 1.1
2.2
t_OF 80% to 20%, Note 1 1.1
2.2
R_O VO=VDDO/2
33
46
VDDO/2, 27 MHz,
40
50
Note 1
VDDO/2, Note 1
45
50
Absolute Clock Period Jitter
Note 1
± 225
Frequency Synthesis Error
All outputs
0
Modulation Rate
30
35
Short Term Jitter
Cycle-to-cycle
225
Long Term Jitter
27 MHz, n=1000
Long Term Jitter
48 MHz, n=1000
Long Term Jitter
22M and 22/24M,
n=1000
Long Term Jitter
37 MHz, n=1000
2.5
Power-up Time
t_PU From minimum VDD
1.5
to outputs stable
Output Enable Time
Output Disable Time
Switching Time
22/24M, Note 2
Max. Units
MHz
3.3 ns
3.3 ns
68
Ω
60
%
55
%
ps
ppm
40 kHz
375 ps
900 ps
750 ps
1200 ps
9
ns
4
ms
50
ns
20
ns
250 ns
Note 1: Measured with a 5 pF load.
Note 2: Finish from prior cycle to start of new cycle.
MDS 1493-17 A
6
Revision 101005
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