EWIXP425BDTQ814 Intel, EWIXP425BDTQ814 Datasheet - Page 71
EWIXP425BDTQ814
Manufacturer Part Number
EWIXP425BDTQ814
Description
Manufacturer
Intel
Datasheet
1.EWIXP425BDTQ814.pdf
(96 pages)
Specifications of EWIXP425BDTQ814
Core Operating Frequency
533MHz
Package Type
BGA
Pin Count
492
Mounting
Surface Mount
Lead Free Status / Rohs Status
Compliant
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General Layout and Routing Guide—Intel
processors
December 2007
Document Number: 252817-008US
• Capacitors should be as physically close to the chip as possible. Keep the total trace
• Use only SMT capacitors where possible. A capacitor size of 0805 achieves the
• For capacitors on signal traces; connect capacitors directly to pin, not splitting the
length less than 0.3 in. It is better to have short trace to a ground or power via
than a longer trace going to a ground or power pin since the inductance of the
planes is relatively lower. Trace inductance (~8 nH per in) is a large part of the total
effective capacitor inductance.
minimum inductance and is therefore preferred. Use 1206 capacitors only for very
large values (> 1 µF). Avoid 0603 capacitors since they show higher failure rates.
signal trace.
— Use 470-pF or 1,000-pF SMT ceramic capacitors for decoupling all connector
— Use 0.1-µF SMT ceramic capacitors for general IC decoupling and ESD
— If two different values of small capacitors are needed, separate the values by at
— Bulk capacitors should be at least 10 times the value of the largest decoupling
— Use 22-µF or 47-µF electrolytic SMT capacitors for general bulk decoupling
— Use 100-µF tantalum SMT capacitors for voltages with large current steps, like
pins for EMI control.
protection. X7R or X7S dielectric is preferred for ceramic capacitors due to their
superior temperature and aging characteristics. Use Z5U or Y5V dielectric only
if a large capacitance is required in a small package.
least two order of magnitude; like, 0.001 µF and 0.1 µF, or 0.01 µF and 1.0 µF,
or 100 µF and 0.01 µF
capacitors.
3.3-V supplies.
Intel
®
®
IXP42X product line and IXC1100 control plane
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
§ §
Hardware Design Guidelines
71
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