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5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
1
2
3
4
Notes:
1,2,3,4) Place center tap capacitors close to the respective
transformer.
Design Example
10 and 100 Mbit Ethernet
Network Interface
with RJ-45 connectors
A_1CEN
A_2CEN
B_1P
B_1N
B_2CEN
B_2CEN/SCL
B_2P
A_1P
A_1P/RXP
A_1N
A_2P
A_2N
B_1CEN
B_2N
B_2N/SDN
C_TX
C_RX
C_TXEN
C_BUSP_N
GATE1
GATE2
B_1P/RXP
A_2CEN/SCL
A_2N/SDN
A_4N/TXN/TX_N
A_4CEN/CD/BUSP_N
A_4P/TXP/TX
A_3N/TXDIS
A_3P/TXEN
NW_LED1A_N
NW_LED1B_N
NW_LED2A_N
NW_LED2B_N
NW_LED3A_N
NW_LED3B_N
NW_LED4A_N
NW_LED4B_N
B_4N/TXN/TX_N
B_4CEN/CD/BUSP_N
B_4P/TXP/TX
B_3N/TXDIS
B_3CEN/RX
B_3P/TXEN
B_1CEN/SDA
B_1N/RXN
B_2P/SDP
A_1CEN/SDA
A_1N/RXN
A_2P/SDP
A_3CEN/RX
TDB-
RDB+
RDB-
TDB+
TDB+
TDB-
RDB-
SHIELDB
RDB+
RDA+
SHIELDA
RDA-
TDA+
TDA+
TDA-
TDA-
RDA+
RDA-
3V3
3V3
3V3
FE
FE
FE
FE
J4
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
C1
1nF/2kV
R10
75R
C4
1nF/2kV
R1
1M
C6
100nF/16V
TR1
Ethernet Trafo
TR2
Ethernet Trafo
R8
75R
J5
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
R4
75R
C3
100nF/16V
C7
100nF/16V
R3
75R
R7
1M
J6
B40-1 connector
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
R9
75R
C5
1nF/2kV
R2
75R
C2
100nF/16V
R5
75R
R6
75R
C8
1nF/2kV
7490100111A (Würth Elektronik Gmbh)
7490100111A (Würth Elektronik Gmbh)
RJ-45 connector
SS-60300-032 (Bel stewart)
RJ-45 connector
SS-60300-032 (Bel stewart)