參數(shù)資料
型號: EWIXP455ABT
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: 266 MHz, RISC PROCESSOR, PBGA544
封裝: LEAD FREE, PLASTIC, BGA-544
文件頁數(shù): 22/163頁
文件大?。?/td> 1123K
代理商: EWIXP455ABT
Electrical Specifications
May 2005
Intel IXP45X and Intel IXP46X Product Line of Network Processors Datasheet
118
Document Number: 306261-002
5.2.5
VCCOSC Requirement
A parallel combination of a 10-nF capacitor (for bypass) and a 200-nF capacitor (for a first-order
filter with a cut-off frequency below 33 MHz) must be connected to both of the VCCOSC pins of the
IXP45X/IXP46X network processors.
The grounds of both capacitors should be connected to the VSSOSC supply pin. Both capacitors
should be located less than 0.5 inch away from the VCCOSC pin and the associated VSSOSC pin.
In order to achieve a 200-nF capacitance, a parallel combination of two 100-nF capacitors may be
used as long as the capacitors are placed directly beside each other.
Figure 12.
VCCOSCP Power Filtering Diagram
Vc c p
170 nF
V SS
V CC OS CP
V SS O S C P
V SSO SC P
In t e l
I X P 45X / I X P 46X
Ne t w o r k
P r oc es s o r s
Figure 13.
VCCOSC Power Filtering Diagram
Vc c
V SS O S C
10 nF
V SS
100 nF
V CCO S C
In te l
IX P 45X /IX P 46 X
Ne tw o rk
P roc es s o rs
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