DM9000BIEP DAVICOM [Davicom Semiconductor, Inc.], DM9000BIEP Datasheet - Page 54

• Manufacturer Part Number: DM9000BIEP
• Description: Industrial-grade Ethernet Controller with General Processor Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

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
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.
Preliminary
Version: DM9000BI-13-DS-P02
January 17, 2008
Tx / RX turns ratio
Inductance
Insertion loss
Return loss
Differential
mode rejection
Transformer isolation
Parameter
to
common
Industrial-grade Ethernet Controller with General Processor Interface
1:1 CT / 1:1
Crystal Circuit Diagram
AGND
Values
1500
X2
43
22pf
350
-18
-14
-12
-40
-30
1.1
Figure 11-6
25MHz
44
X1
AGND
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,
Connects to pins X1 and X2, and shunts each crystal
lead to ground with a 22pf capacitor (see figure 11-6).
22pf
dB ( Max )
dB ( Min )
dB ( Min )
dB ( Min )
dB ( Min )
dB ( Min )
µH (Min)
Units
V
-
Test Condition
60 – 100 MHz
1 – 100 MHz
30 – 60 MHz
60 – 80 MHz
1 – 60 MHz
1 –30 MHz
DM9000BI
-
-
-
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