参数资料
型号: WJLXT972ALC.A4SE000
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: LEAD FREE, LQFP-64
文件页数: 39/100页
文件大小: 1046K
代理商: WJLXT972ALC.A4SE000
LXT972A 3.3 V Dual-Speed Fast Ethernet Transceiver
Datasheet
43
Document #: 249186
Revision #: 003
Rev. Date: August 7, 2002
Figure 21. Typical Twisted-Pair Interface - Switch
TPIP
TPIN
RJ-45
* = 0.001
F / 2.0 kV
To
Tw
is
ted-Pai
rNet
w
ork
3
6
1
2
1:1
LXT972A
50
50
50
50
50
50
4
5
8
7
1:1
1
TPOP
TPON
VCCA
GND
0.1
F
.01
F
2
270 pF 5%
0.01
F
50
1%
50
1%
**
3
4
0.1
F
1. Center-tap current may be supplied from 3.3 V VCCA as shown. Additional power savings may be
realized by supplying the center-tap from a 2.5 V current source. A separate ferrite bead (rated at 50
mA) should be used to supply center-tap current.
2. The 100
transmit load termination resistor typically required is integrated in the LXT972A.
3. Magnetics without a receive pair center-tap do not require a 2 kV termination.
4. RJ-45 connections shown are for a standard switch application. For a standard NIC RJ-45 setup, see
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