参数资料
型号: WJLXT971ALE.A4-857346
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64
文件页数: 42/80页
文件大小: 931K
代理商: WJLXT971ALE.A4-857346
Page 47
Cortina Systems LXT972A Single-Port 10/100 Mbps PHY Transceiver
LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
6.0 Application Information
6.0
Application Information
6.1
Magnetics Information
The LXT972A PHY 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
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 19 provides a comparison of the RJ-45 connections for NIC and Switch applications
in a typical twisted-pair interface setting.
Figure 19 shows the LXT972A PHY in a typical twisted-pair interface, with the RJ-45
connections crossed over for a Switch configuration.
Table 18
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 19
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
相关PDF资料
PDF描述
WJLXT972ALC.A4-857341 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT972ALC.A4-857345 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT971ALC.A4SE000 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT971ALC.A4SE001 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT971ALE.A4SE000 DATACOM, ETHERNET TRANSCEIVER, PQFP64
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