参数资料
型号: WJLXT971ALE.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: 63/116页
文件大小: 1172K
代理商: WJLXT971ALE.A4SE000
LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
50
Datasheet
Document #: 249414
Revision #: 002
Rev. Date: August 7, 2002
Figure 23. Typical Twisted-Pair Interface - NIC
TPFIP
TPFIN
* = 0.001
F / 2.0 kV
To
Tw
is
ted
-P
ai
rN
et
w
ork
1:1
LXT971A
1:1
1
TPFOP
TPFON
VCCA
GND
0.1
F
.01
F
2
270 pF 5%
0.01
F
50
1%
50
1%
**
3
SD/TP
6
3
8
7
5
4
1
2
50
50
50
RJ-45
50
50
50
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 LXT971A.
3. Magnetics without a receive pair center-tap do not require a 2 kV termination.
4. RJ-45 connections shown for standard NIC. TX/RX crossover may be required for repeater and
switch applications.
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