DM9081_01 datasheet(19/22 Pages) DAVICOM

Part #	DM9081

Description	10BASE-T Hub Controller

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Manufacturer	DAVICOM [Davicom Semiconductor, Inc.]

Direct Link	http://www.davicom.com.tw

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19 / 22 page

DM9081

10BASE-T Hub Controller

Final

19

Version: DM9081-DS-F02

February 02, 2001

Layout Recommendation

Decoupling

The DM9081 contains both analog and digital

elements. Separate power pins are provided for the

analog sections, the digital portion of TP line drivers,

the TP line drivers, and the digital core logic. Care

should be taken in board design to minimize coupling

of noise from the power supply and digital logic to the

analog power pins. Decoupling capacitors should be

placed as close to the appropriate VDD and GND pins

as possible. Figure 7 shows the recommended

decoupling values for the DM9081 chip.

Figure 7. DM9081 Device Power Supply Decouping Recommendations

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