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DM9000BI Datasheet(PDF) 54 Page - Davicom Semiconductor, Inc.

Part # DM9000BI
Description  Industrial-grade Ethernet Controller with General Processor Interface
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Manufacturer  DAVICOM [Davicom Semiconductor, Inc.]
Direct Link  http://www.davicom.com.tw
Logo DAVICOM - Davicom Semiconductor, Inc.

DM9000BI Datasheet(HTML) 54 Page - Davicom Semiconductor, Inc.

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DM9000BI
Industrial-grade Ethernet Controller with General Processor Interface
Preliminary
54
Version: DM9000BI-13-DS-P02
January 17, 2008
11.7 Magnetic Specification Requirements
Refer to the following table for 10/100M magnetic
specification requirements. The magnetic which meet
these requirements are available from a variety of
magnetic manufacturers. Designers should test and
qualify all magnetic specifications before using them
in an application. Industrial-temperature range, RoHS
regulations, please contact with your magnetic
vendor, this table only for you reference,
Parameter
Values
Units
Test Condition
Tx / RX turns ratio
1:1 CT / 1:1
-
-
Inductance
350
µH (Min)
-
Insertion loss
1.1
dB ( Max )
1 – 100 MHz
-18
dB ( Min )
1 –30 MHz
-14
dB ( Min )
30 – 60 MHz
Return loss
-12
dB ( Min )
60 – 80 MHz
-40
dB ( Min )
1 – 60 MHz
Differential
to
common
mode rejection
-30
dB ( Min )
60 – 100 MHz
Transformer isolation
1500
V
-
11.8 Crystal Selection Guide
A crystal can be used to generate the 25MHz
reference clock instead of an oscillator. The crystal
must be a fundamental type, and series-resonant.
Connects to pins X1 and X2, and shunts each crystal
lead to ground with a 22pf capacitor (see figure 11-6).
Figure 11-6
Crystal Circuit Diagram
43
44
X1
X2
AGND
AGND
22pf
25MHz
22pf


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