dm9000a Davicom Semiconductor, Inc., dm9000a Datasheet - Page 57

• Manufacturer Part Number: dm9000a
• Description: Ethernet Controller With General Processor Interface
• Manufacturer: Davicom Semiconductor, Inc.

11.7 Magnetics Selection Guide
Refer to Table 2 for transformer requirements.
Transformers, meeting these requirements, are
available from a variety of magnetic manufacturers.
Designers should test and qualify all magnetics before
Table 2
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.
Final
Version: DM9000A-17-DS-F01
May 10, 2006
Pulse Engineering
Nano Pulse Inc.
Manufacturer
Macronics
MAGCOM
Bothhand
Bel Fuse
Fil-Mag
Valor
Delta
Halo
YCL
PE-68515, H1078, H1012, H1102
LF8200, LF8221x
20PMT04, 20PMT05, PH163112 , YCL 0303
PH163539 *(Auto MDIX)
HS9001 , HS9016
TG22-3506ND, TD22-3506G1, TG22-S010ND, TG22-S012ND
TG110-S050N2
NPI 6181-37, NPI 6120-30, NPI 6120-37
NPI 6170-30
PT41715
S558-5999-01, S558-5999-W2
ST6114, ST6118
HS2123, HS2213
TS6121C,16ST8515,16ST1086
Crystal Circuit Diagram
DGND
X2
43
22pf
Figure 11-6
25MHz
Ethernet Controller with General Processor Interface
44
X1
using them in an application. The transformers listed
in Table 2 are electrical equivalents, but may not be
pin-to-pin equivalents.
Connects to pins X1 and X2, and shunts each crystal
lead to ground with a 22pf capacitor (see figure 11-6).
DGND
22pf
Part Number
DM9000A
57