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DM9601
USB to Ethernet MAC Controller with Integrated 10/100 PHY
54
Final
Version: DM9601-DS-F01
June 22, 2002
11.8 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
using them in an application. The transformers listed
in Table 2 are electrical equivalent, but may not be
pin-to-pin equivalent.
Manufacturer
Part Number
Pulse Engineering
PE-68515, H1078, H1012
H1102
Delta
LF8200, LF8221x
YCL
20PMT04, 20PMT05
Halo
TG22-3506ND, TD22-3506G1, TG22-
S010ND
TG22-S012ND
Nano Pulse Inc.
NPI 6181-37, NPI 6120-30, NPI 6120-37
NPI 6170-30
Fil-Mag
PT41715
Bel Fuse
S558-5999-01
Valor
ST6114, ST6118
Macronics
HS2123, HS2213
Table 2
11.9 Crystal Selection Guide
A crystal can be used to generate the 25Mhz
reference clock instead of a oscillator. The crystal
must be a fundamental type, series-resonant.
Connect to X1 and X2, shunt each crystal lead to
ground with a 22pf capacitor (see figure 7).
21
22
X1_25M
X2_25M
AGND
AGND
C18
22pf
Y1
25M
C19
22pf
Figure 14-7
Crystal Circuit Diagram
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