参数资料
型号: WBLXT974BHCA8
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP160
封装: ROHS COMPLIANT, PLASTIC, MS-002DD-1, HQFP-160
文件页数: 39/76页
文件大小: 1004K
代理商: WBLXT974BHCA8
LXT974/LXT975 — Fast Ethernet 10/100 Quad Transceivers
44
Datasheet
3.3
Twisted-Pair/ RJ-45 Interface
Figure 20 shows layout of the LXT974 twisted-pair interface in a single-high RJ-45 modular
application. Figure 21 shows layout of the LXT975 twisted-pair interface in a dual-high (stacked)
RJ-45 application.
Figure 20. Typical LXT974 Twisted-Pair Single RJ-45 Modular Application
RJ-45
Footprint
16
0
15
9
15
8
15
7
15
6
15
5
15
4
15
3
15
2
15
1
15
0
14
9
14
8
14
7
14
6
14
5
14
4
14
3
14
2
14
1
14
0
13
9
13
8
13
7
13
6
13
5
13
4
13
3
13
2
13
1
13
0
12
9
12
8
12
7
12
6
12
5
12
4
12
3
12
2
12
1
TP
1
TP
O
N
1
VC
CT
GNDT
TP
O
P
1
VC
CR
TP
IN
1
TP
IP
1
GNDR
RB
IAS
TP
2
TP
O
N
2
VC
CT
GNDT
TP
O
P
2
VC
CR
TP
IN
2
TP
IP
2
GNDR
TP
3
TP
O
N
3
VC
CT
GNDT
TP
O
P
3
VC
CR
TP
IN
3
TP
IP
3
GNDR
LXT974
1
40
2
39
3
38
5
36
6
35
8
33 34
4
7
9
10
31
11
30
12
29
13
28
15
26
16
25
18
23 24
14
17
19
20
21
Edge of PCB
Rx
Tx
Rx
Tx
Rx
Termination
resistors and
common mode
bypass capacitors
are not shown.
See "Layout
Requirements"
section for
recommended
application circuit.
Port 0
Port 1
Port 2
Port 3
Amphenol
557571-1
1X4 Port Single Modular Jack
GN
D
T
EST
TP
0
TP
O
N
0
V
CCT
GN
DT
TP
O
P
0
V
CCR
TP
IN
0
TP
IP
0
GN
DR
Single
RJ-45
24
68
2
4
68
13
57
13
57
24
68
24
68
1
3
57
13
57
18
Port 2
Port 3
Port 1
Port 0
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WBLXT9785EHC.C2V DATACOM, INTERFACE CIRCUIT, PQFP208
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