參數(shù)資料
型號: 9860
廠商: Intel Corp.
英文描述: Advanced 10/100 Repeater with Intergrated Management
中文描述: 高級10/100中繼器與綜合管理
文件頁數(shù): 64/118頁
文件大?。?/td> 1648K
代理商: 9860
LXT9860/9880
Advanced 10/100 Repeater with Integrated Management
64
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
Place the layers so the TPOP/N and TPIP/N signals are routed near or next to the ground
plane. For EMI, it is more important to shield TPOP/N than TPIP/N.
4.3.1.4
Chassis Ground
For ESD protection, create a separate chassis ground. For isolation, encircle the board and place a
moat
around the signal ground plane to separate signal ground from chassis ground. Chassis
ground should extend from the RJ-45 connectors to the magnetics, and can be used to terminate
unused signal pairs (
Bob Smith
termination). In single-point grounding applications, provide a
single connection between chassis and circuit grounds with a 2kV isolation capacitor. In multi-
point grounding schemes (chassis and circuit grounds joined at multiple points), provide 2kV
isolation to the Bob Smith termination.
4.3.1.5
The RBIAS Pin
The LXT98x0 requires a 22.1 k
,
1% resistor directly connected between the RBIAS pin and
ground. Place the RBIAS resistor as close to the RBIAS pin as possible. Run an etch directly from
the pin to the resistor, sink the other side of the resistor, and surround the RBIAS trace with a
filtered ground.
Do not run high-speed signals next to RBIAS
.
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