参数资料
型号: WJLXT971ALC.A4-857344
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64
文件页数: 43/80页
文件大小: 931K
代理商: WJLXT971ALC.A4-857344
Page 48
Cortina Systems LXT972A Single-Port 10/100 Mbps PHY Transceiver
LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
6.2 Typical Twisted-Pair
Interface
Figure 20 shows the LXT972A PHY in a typical twisted-pair interface, with the RJ-45
connections configured for a NIC application.
Figure 19
Typical Twisted-Pair Interface - Switch
TPIP
TPIN
RJ-45
* = 0.001
μF / 2.0 kV
T
o
T
w
is
ted
-P
ai
r
N
et
w
or
k
3
6
1
2
1:1
LXT97x PHY
50
Ω
50
Ω
50
Ω
50
Ω
50
Ω
50
Ω
4
5
8
7
1:1
1
TPOP
TPON
VCCA
GND
0.1
μF
.01
μF
2
270 pF 5%
0.01
μF
50
Ω 1%
50
Ω 1%
**
3
4
0.1
μF
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
Ω transmit load termination resistor typically required is integrated in the PHY.
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.
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WJLXT971ALE.A4-857343 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT971ALE.A4-857346 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT972ALC.A4-857341 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT972ALC.A4-857345 DATACOM, ETHERNET TRANSCEIVER, PQFP64
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