Datasheet

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.
Figure 26 Circuit Diagram with Transformer
Transformer Specification
Table 15 and Table 16 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 15 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
Return Loss -18 dB minimum 1 to 30 MHz
-14 dB maximum 30 to 60 MHz
-12 dB minimum 60 to 80 MHz
Differential to
Common Mode
Injection
-40 dB maximum 1 to 60 MHz
-30 dB minimum 60 to 1000 MHz
Transformer Isolation 1500 V

Part Number 40183-101 Silex SX-550 Developer's Guide Page 48