ICS149317 Datasheet, PDF (5/11 Pages) Integrated Circuit Systems – Clock Synthesizer for Portable Systems

PRELIMINARY INFORMATION
ICS1493-17
Clock Synthesizer for Portable Systems
Parameter
Internal Pull-down Resistor
Internal Pull-up Resistor
Symbol Conditions
R_{PD OE, 48M, 22M,}
22/24M, 37M, 27M
R_Pu SCK, SDATA
Min.
75
100
Typ.
250
500
Max. Units
kΩ
kΩ
AC Electrical Characteristics
Unless stated otherwise, VDDO = 2.5 V ±5%, 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 0.7
1.5
t_OF 80% to 20%, Note 1 0.7
1.5
R_O VO=VDDO/2
33
46
VDDO/2, 27 MHz,
40
50
Note 1
VDDO/2, Note 1
45
50
Frequency Synthesis Error
All outputs
0
Modulation Rate
30
35
Short Term Jitter
Cycle-to-Cycle
150
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 non-spread,
1.5
n=1000
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
Note 1: Measured with a 5 pF load.
Note 2: Finish from prior cycle to start of new cycle.
Max. Units
MHz
2.2 ns
2.2 ns
68
Ω
60
%
55
%
ppm
40 kHz
300 ps
600 ps
800 ps
1.2 ns
6
ns
3
ms
50
ns
20
ns
100 ns
MDS 1493-17 A
5
Revision 101005
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