Silex technology WLAN MODULE SX-550 - Manual (Page 55)

Designing with the SX-550 silex Page 49
Part Number 40183-101
Ethernet PHY
The Ethernet PHY is located on the processor card. The manufacturer is Davicom and the part number is
DM9161AE. For additional information on the layout of the transformer and RJ-45 jack, refer to the
Davicom website at www.davicom.com.tw.
Transformer
40-pin
OEM
Header
RJ46
2
7
4
1
3
7
2
1
3
4
7
8
5
6
1:1
1:1
Figure 23 Circuit Diagram with Transformer
Transformer Specification
Table 33 and Table 34 detail the magnetic specifications and manufacturer sources. Magnetics that meet
these requirements are available from various magnetic manufacturers. You should test and qualify the
magnetic specifications prior to use in your application. The magnetics listed are electrical equivalents;
however, may not be pin-to-pin equivalents.
Table 33 10/100M Magnetic Specifications
Parameter Values Units Test Conditions
TX/RX Turns Ratio 1:1 CT/1:1  
Inductance 350 µH minimum
Insertion Loss 1.1 dB maximum 1 to 100 MHz
-18 dB minimum 1 to 30 MHz
-14 dB maximum 30 to 60 MHz
Return Loss
-12 dB minimum 60 to 80 MHz
-40 dB maximum 1 to 60 MHz Differential to Common Mode
Injection
-30 dB minimum 60 to 1000 MHz
Transformer Isolation 1500 V 