参数资料
型号: WBLXT974BHCA8
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP160
封装: ROHS COMPLIANT, PLASTIC, MS-002DD-1, HQFP-160
文件页数: 38/76页
文件大小: 1004K
代理商: WBLXT974BHCA8
Fast Ethernet 10/100 Quad Transceivers — LXT974/LXT975
Datasheet
43
3.2
Magnetics Information
The LXT974/975 requires a 1:1 ratio for the receive transformers and a 2:1 ratio for the transmit
transformers as shown in Table 21. The transformer isolation voltage should be rated at 2 kV to
protect the circuitry from static voltages across the connectors and cables.
Refer to the Magnetic Manufacturers Cross Reference Guide (Application Note 73) for a list of
suitable magnetic manufacturers and part numbers. The latest version is located on the Intel web
site (http://developer.intel.com/design/network/). Suitable Magnetic part numbers are provided as a
reference only. Before committing to a specific component, designers should contact the
manufacturer for current product specifications, and validate the magnetics for a specific
application.
3.2.1
Magnetics With Improved Return Loss Performance
Intel is working with magnetic vendors to develop magnetic modules with improved return loss
characteristics. These improved magnetics simplify the design requirements for meeting ANSI
X3.263 return loss specifications.
Table 21. Magnetics Requirements
Parameter
Min
Nom
Max
Units
Test Condition
Rx turns ratio
1 : 1
Tx turns ratio
2 : 1
Insertion loss
0.0
1.1
dB
80 MHz
Primary inductance
350
μH
Transformer isolation
2
kV
Differential to common mode rejection
40
dB
.1 to 60 MHz
35
dB
60 to 100 MHz
Return Loss - Standard
––
-16
dB
30 MHz
––
-10
dB
80 MHz
Return Loss - Improved
––
-20
dB
30 MHz
––
-15
dB
80 MHz
相关PDF资料
PDF描述
WBLXT9785EHC.C2V DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0-865110 DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0-865111 DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0 DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785HC.C2V DATACOM, INTERFACE CIRCUIT, PQFP208
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