參數(shù)資料
型號: WJLXT972MLC.A4
廠商: INTEL CORP
元件分類: 網(wǎng)絡(luò)接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP48
封裝: ROHS COMPLIANT, LQFP-48
文件頁數(shù): 53/92頁
文件大?。?/td> 1257K
代理商: WJLXT972MLC.A4
Intel
LXT972M Single-Port 10/100 Mbps PHY Transceiver
Datasheet
57
Document Number: 302875-005
Revision Date: 27-Oct-2005
6.0
Application Information
6.1
Magnetics Information
The LXT972M Transceiver requires a 1:1 ratio for both the receive and transmit transformers. The
transformer isolation voltage should be rated at 2 kV to protect the circuitry from static voltages
across the connectors and cables. For transformer/magnetics requirements, see Table 19.
Note:
Before committing to a specific component, contact the manufacturer for current product
specifications and validate the magnetics for the specific application.
6.2
Typical Twisted-Pair Interface
Table 20 provides a comparison of the RJ-45 connections for NIC and Switch applications in a
typical twisted-pair interface setting.
Table 19. Magnetics Requirements
Parameter
Min
Nom
Max
Units
Test Condition
Rx turns ratio
1 : 1
Tx turns ratio
1 : 1
Insertion loss
0.0
0.6
1.1
dB
Primary inductance
350
μH–
Transformer isolation
1.5
kV
Differential to common mode rejection
40
dB
0.1 to 60 MHz
35
dB
60 to 100 MHz
Return Loss
-16
dB
30 MHz
-10
dB
80 MHz
Table 20. I/O Pin Comparison of NIC and Switch RJ-45 Setups
Symbol
RJ-45
Switch
NIC
TPIP
1
3
TPIN
2
6
TPOP
3
1
TPON
6
2
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