DJLXT972ALC.A4 Cortina Systems Inc, DJLXT972ALC.A4 Datasheet - Page 49
DJLXT972ALC.A4
Manufacturer Part Number
DJLXT972ALC.A4
Description
Manufacturer
Cortina Systems Inc
Datasheet
1.DJLXT972ALC.A4.pdf
(80 pages)
Specifications of DJLXT972ALC.A4
Lead Free Status / RoHS Status
Not Compliant
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LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
Figure 20
Cortina Systems
Typical Twisted-Pair Interface - NIC
®
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 for standard NIC. TX/RX crossover may be required for repeater and switch
LXT972A 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.
applications.
LXT97x PHY
SD/TP_L
VCCA
TPON
TPOP
TPIP
TPIN
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
6.2 Typical Twisted-Pair
B3399-03
50 Ω
50 Ω
50 Ω
50 Ω
RJ-45
4
8
7
6
5
4
3
2
1
Interface
Page 49
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