ICS448-16 Datasheet, PDF (5/7 Pages) Integrated Circuit Systems – Networking Clock Synthesizer

ICS448-16
Networking Clock Synthesizer
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70°C
Parameter
Symbol Conditions
Min.
Input Frequency
Output Rise Time
Output Fall Time
Output Clock Duty Cycle
f_IN
t_OR 20% to 80%, Note 1
t_OF 80% to 20%, Note 1
at VDD/2, Note 1
45
Absolute Clock Period Jitter
Note 1
Frequency Synthesis Error
All clock outputs
Startup Time
Output Enable Time
t_OE PDTS high to output
locked to ±1%
Output Disable Time
t_OD PDTS low to tri-state
Note 1: Measured with a 15 pF load.
Thermal Characteristics
Typ.
25
1
1
50
±150
0
1
20
2
Max. Units
MHz
ns
ns
55
%
ps
ppm
2
ms
µs
ns
Parameter
Symbol Conditions
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Case
θ_JA Still air
θ_JA 1 m/s air flow
θ_JA 3 m/s air flow
θ_JC
Marking Diagram
16
9
Min.
Typ.
78
70
68
37
Max.
Units
°C/W
°C/W
°C/W
°C/W
448R-16
######
YYWW
1
8
Notes:
1. ###### is the lot code.
2. YYWW is the last two digits of the year, and the week
number that the part was assembled.
MDS 448-16 E
5
Revision 031605
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