P R E L I M I N A RY I N F O R M AT I O N
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
Input Frequency
Output Rise Time
Output Fall Time
Output Impedance
Output Clock Duty Cycle
Symbol
f
IN
t
OR
t
OF
R
O
Conditions
20% to 80%, Note 1
80% to 20%, Note 1
VO=VDDO/2
VDDO/2, 27 MHz,
Note 1
VDDO/2, Note 1
Note 1
All outputs
Min.
1.1
1.1
33
40
45
Typ.
27
2.2
2.2
46
50
50
± 225
0
Max. Units
MHz
3.3
3.3
68
60
55
ns
ns
Ω
%
%
ps
ppm
40
375
900
750
1200
kHz
ps
ps
ps
ps
ns
ms
ns
ns
ns
Absolute Clock Period Jitter
Frequency Synthesis Error
Modulation Rate
Short Term Jitter
Long Term Jitter
Long Term Jitter
Long Term Jitter
Long Term Jitter
Power-up Time
Output Enable Time
Output Disable Time
Switching Time
Note 1: Measured with a 5 pF load.
t
PU
30
Cycle-to-cycle
27 MHz, n=1000
48 MHz, n=1000
22M and 22/24M,
n=1000
37 MHz, n=1000
From minimum VDD
to outputs stable
35
225
2.5
1.5
9
4
50
20
250
22/24M, Note 2
Note 2: Finish from prior cycle to start of new cycle.
MDS 1493-17 A
Integrated Circuit Systems
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6
525 Ra ce Stree t, Sa n Jose, CA 951 26
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Revision 101005
te l (4 08) 297 -1201
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ICS [ INTEGRATED CIRCUIT SYSTEMS ]
