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參數(shù)資料
| 型號(hào)： | 9883 |
| 廠商： | Intel Corp. |
| 英文描述： | Advanced 10/100 Umnmanaged Repeater |
| 中文描述： | 高級(jí)10/100 Umnmanaged直放站 |
| 文件頁數(shù)： | 34/56頁 |
| 文件大?。?/td> | 719K |
| 代理商： | 9883 |
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LXT9883/9863
—
Advanced 10/100 Unmanaged Repeater
34
Datasheet
Document #: 249115
Revision #: 003
Rev. Date: 08/07/01
4.2.4
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.
4.2.5
The RBIAS Pin
The LXT98x3 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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