Ethernet design using discrete components
Applicable receivers: BD970
For maximum flexibility, a system integrator may choose to implement the ethernet using discrete parts. The design below shows an example of such a design. It includes the ethernet magnetics, termination of unused lines as well as surge protection. The magnetics used is a Pulse Engineering HX1188. Surge protection is provided by a Semtech SLVU2.8-4. In order to meet electrical isolation requirements, it is recommended to use capacitors with a greater than 2 kV breakdown voltage.
Ethernet schematic
|
Part Reference |
Value |
|---|---|
|
C3 |
1000pF 2 kV |
|
C4 |
1000pF 2 kV |
|
C5 |
1000pF 2 kV |
|
D7 |
SEMTECH SLVU2.8–4 |
|
J2 |
Main Conn |
|
J5 |
RJ45 Conn |
|
L300 |
Fer. Bead 300 mA 1 k @ 1 MHz |
|
L301 |
Fer. Bead 300 mA 1 k @ 1 MHz |
|
R11 |
49.9 0402 1% |
|
R13 |
49.9 0402 1% |
|
R15 |
49.9 0402 1% |
|
R16 |
49.9 0402 1% |
|
R17 |
49.9 0402 1% |
|
R23 |
49.9 0402 1% |
|
R24 |
49.9 0402 1% |
|
R25 |
49.9 0402 1% |
|
T1 |
Pulse engineering HX1188 |
