Figure 16.
Ethernet interface
Differential
Pairs
Differential
Pair
Differential
Pair
Differential
Pair
Differential
Pair
Pull up
RXD
RXD0
RXD1
RXD2
RXD3
LEGEND
50 OHM SAME LENGHT TRACE
50 OHM TRACE
NORMAL TRACE
AS SHORT AS POSSIBLE TRACE
PIN1 PIN12 PIN47
PIN16 PIN34
PIN40
PIN4 PIN9
PIN44
PIN14 PIN18 PIN23 PIN26 PIN30 PIN39
Supply Filters
ESD Protection
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND_ETH GND_ETH
GND
GND_ETH
TXRXP _A
TXRXP _A
TXRXM_A
TXRXP _B
TXRXM_B
TXRXP _C
TXRXM_C
TXRXP _D
TXRXM_D
TXRXM_A
TXRXP _B
TXRXM_B
TXRXP _C
TXRXM_C
TXRXP _D
TXRXM_D
P S 5
P S 3
P O2
P S 0
DVDDL
AVDDL
AVDDL_P LL
TRCT1
TRCT2
TRCT3
TRCT4
TXRXM_B
TXRXP _B
TXRXM_A
TXRXP _A
TXRXP _A
TXRXM_B
TXRXP _B
TXRXM_A
TXRXM_D
TXRXP _D
TXRXM_C
TXRXP _C
TXRXM_D
TXRXP _D
TXRXM_C
TXRXP _C
AVDDH
DVDDH
P R12
P R10
P R8
P R6
P R0
P R2
P O1
P R14
P Q15
P Q14
P R4
P O2
P S 0
P S 5
P S 3
LED2
LED1
LED1
LED2
P ORS T
LD_GREEN
LD_GREEN
LD_YELLOW
LD_YELLOW
TRCT1
TRCT2
TRCT3
TRCT4
AVDDH
3.3V_S R
DVDDH
3.3V_S R
AVDDL
1.2V_S R
AVDDL_P LL
1.2V_S R
DVDDL
1.2V_S R
DVDDH
DVDDH
DVDDH
DVDDH
DVDDH
DVDDH
DVDDH
DVDDH
DVDDH
R67
10K
C112 22pF
C123
47uF
10V
1206
C135
100nF
50V
C111 22pF
C132
100nF
50V
R49
10K
C128
100nF
50V
C137
47uF
10V
1206
U14
HS P 061-4M10Y
I/0 1
1
I/0 2
2
GND
3
I/0 3
4
I/0 4
5
NC1
6
NC2
7
GND
8
NC3
9
NC4
10
L7
L6
C115
100nF
50V
C113
100nF
50V
R50
10K
L8
U16
L829-1J 1T-43
TRD1+
11
TRCT1
12
TRD1-
10
TRD2+
4
TRCT2
6
TRD2-
5
TRD3+
3
TRCT3
1
TRD3-
2
TRD4+
8
TRCT4
7
TRD4-
9
LD_COM_A
16
LD_GREEN
17
LD_ORANGE
15
LD_YELLOW_C
13
LD_YELLOW_A
14
S
H
1
20
S
H
2
21
C116
100nF
50V
L5
C138
100nF
50V
C140
100nF
50V
R55 180R
C133
100nF
50V
C124
100nF
50V
C114
100nF
50V
C129
100nF
50V
R51
10K
Y4
25MHZ
1
1
2
2
3
3
4
4
TP 2
C141
100nF
50V
C142
100nF
50V
R52
10K
R75
0R
C136
10nF
50V
L9
C143
100nF
50V
R56 180R
C130
100nF
50V
C125
100nF
50V
R90
4K7
R54
12K1
C139
100nF
50V
R48
4K7
U13
HS P 061-4M10Y
I/0 1
1
I/0 2
2
GND
3
I/0 3
4
I/0 4
5
NC1
6
NC2
7
GND
8
NC3
9
NC4
10
FBEAD1
TP 3
C131
47uF
10V
1206
C126
100nF
50V
C134
47uF
10V
1206
CF1100nF
50V
C127
47uF
10V
1206
KSZ9031RNX
48-pin QFN
Pa ddle Ground
(bottom of chip)
U15
KS Z9031RNXIA
N
C
13
LE
D
2
15
D
V
D
D
H
16
LE
D
1
/
P
M
E
_N
1
17
D
V
D
D
L
14
T
X
D
0
19
T
X
D
1
20
T
X
D
2
21
T
X
D
3
22
D
V
D
D
L
18
D
V
D
D
L
23
G
T
X
_C
LK
24
TX_EN
25
DVDDL
26
RXD3
27
VSS
29
DVDDL
30
RXD1
31
RXD0
32
RX_DV
33
DVDDH
34
RX_CLK
35
MDC
36
M
D
IO
37
IN
T
_N
/
P
M
E
_N
2
38
D
V
D
D
L
39
D
V
D
D
H
40
C
LK
12
5_
N
D
O
41
R
E
S
E
T
_N
42
LD
O
_O
43
X
O
45
X
I
46
N
C
47
IS
E
T
48
AVDDH
1
TXRXP_A
2
TXRXM_A
3
TXRXP_B
5
TXRXM_B
6
TXRXP_C
7
TXRXM_C
8
TXRXP_D
10
TXRXM_D
11
AVDDH
12
RXD2
28
A
V
D
D
L_
P
LL
44
P
_G
N
D
49
AVDDL
4
AVDDL
9
TXRXM_A
TXRXP _A
TXRXM_B
TXRXP _B
TXRXM_C
TXRXP _C
TXRXP _D
TXRXM_D
X
I
X
O
XO
IN
T
_N
INT_N
LED2
LED1
XI
UM2789
-
Rev 1
page 29/36
UM2789
Schematic