DJLXT972ALC.A4 Cortina Systems Inc, DJLXT972ALC.A4 Datasheet - Page 48

• Manufacturer Part Number: DJLXT972ALC.A4
• Manufacturer: Cortina Systems Inc

Specifications of DJLXT972ALC.A4

• Lead Free Status / RoHS Status: Not Compliant

LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
Figure 19
Cortina Systems
Typical Twisted-Pair Interface - Switch
Figure 20
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.
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.
shows the LXT972A PHY in a typical twisted-pair interface, with the RJ-45
LXT97x PHY
TPON
VCCA
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
50 Ω
50 Ω
50 Ω
50 Ω
6.2 Typical Twisted-Pair
RJ-45
1
2
3
4
5
6
7
8
4
Interface
Page 48