C9577
Low EMI Clock Generator/Buffers for Pentium® II Systems
Preliminary
PCB LAYOUT SUGGESTION
Via to VDD Island
Via to GND plane
C9577
VCC3.3V
FB1
Via to VCC plane
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
C34
+
VCC2.5V
22µF
FB2
42
41
C5
+
40
39
38
10
11
22µF
12
13
14
15
16
37
36
35
34
33
32
17
18
31
30
19
29
20
21
22
23
28
27
VCC3.3V
26
25
FB3
+
24
C42
22µF
This is only a layout recommendation for best performance and lower EMI. The designer may choose a different approach
but C3, C4, C5, C35, C36, C37, C38, C39, C40 and C41 (all are 0.1µf) should always be used and placed as close as
possible to their VDD pins.
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571
Rev 1.5
4/22/1999
Page 9 of 10
CYPRESS [ CYPRESS ]
