參數(shù)資料
型號(hào): LXT972A
廠商: Intel Corp.
英文描述: 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
中文描述: 3.3雙速快速以太網(wǎng)收發(fā)器數(shù)據(jù)表
文件頁(yè)數(shù): 41/70頁(yè)
文件大小: 833K
代理商: LXT972A
3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
LXT972A
Datasheet
41
Figure 21. Typical Twisted-Pair Interface - Switch
TPIP
TPIN
RJ-45
* = 0.001
μ
F / 2.0 kV
T
3
6
1
2
1:1
LXT972A
50
50
50
50
50
50
4
5
8
7
1:1
1
TPOP
TPON
VCCA
GND
0.1
μ
F
.01
μ
F
2
270 pF 5%
270 pF 5%
0.01
μ
F
50
1%
50
1%
*
*
3
4
0.1
μ
F
1. Center tap current may be supplied from 3.3V VCCA as shown. Additional power savings may be realized by supplying
the center tap from a 2.5V 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 LXT972A.
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, see
Figure 22
.
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