WJLXT971ALE.A4-857346 Cortina Systems Inc, WJLXT971ALE.A4-857346 Datasheet - Page 55
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WJLXT971ALE.A4-857346
Manufacturer Part Number
WJLXT971ALE.A4-857346
Description
Manufacturer
Cortina Systems Inc
Datasheet
1.WJLXT971ALE.A4-857346.pdf
(96 pages)
Specifications of WJLXT971ALE.A4-857346
Lead Free Status / RoHS Status
Compliant
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LXT971A PHY
Datasheet
249414, Revision 5.2
13 September 2007
Figure 22
Cortina Systems
Typical Twisted-Pair Interface - Switch
Figure 22
connections configured for a NIC application.
®
1. Center tap current may be supplied from 3.3 V VCCA as shown. Additional power savings may be
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. For a standard NIC RJ-45 setup,
LXT971A Single-Port 10/100 Mbps PHY Transceiver
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.
LXT97x PHY
shows the LXT971A PHY in a typical twisted-pair interface, with the RJ-45
SD/TP_L
TPFON
TPFOP
TPFIN
TPFIP
VCCA
GND
0.1μF
270 pF 5%
270 pF 5%
0.1μF
2
50Ω 1%
50Ω 1%
0.01 μF
.01μF
1
1:1
1:1
3
*
*
50 Ω
50 Ω
* = 0.001 μF / 2.0 kV
B3396 -02
6.2 Typical Twisted-Pair
50 Ω
50 Ω
50 Ω
50 Ω
RJ-45
4
1
2
3
4
5
6
7
8
Interface
Page 55
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