參數(shù)資料
型號: KSZ8993MLI
廠商: Micrel Inc
文件頁數(shù): 84/86頁
文件大?。?/td> 0K
描述: IC SWITCH 10/100 3PORT 128-PQFP
標準包裝: 66
系列: *
產(chǎn)品目錄頁面: 1081 (CN2011-ZH PDF)
其它名稱: 576-3350
Micrel, Inc.
KSZ8993M/ML
October 2008
85
M9999-020606
Selection of Isolation Transformers
A 1:1 isolation transformer is required at the line interface. An isolation transformer with integrated common-mode
choke is recommended for exceeding FCC requirements.
The following table gives recommended transformer characteristics.
Parameter
Value
Test Condition
Turns ratio
1 CT : 1 CT
Open-circuit inductance (min.)
350
H
100mV, 100kHz, 8mA
Leakage inductance (max.)
0.4
H
1MHz (min.)
Inter-winding capacitance (max.)
12pF
D.C. resistance (max.)
0.9
Insertion loss (max.)
1.0dB
0MHz – 65MHz
HIPOT (min.)
1500Vrms
Table 27. Transformer Selection Criteria
Magnetic Manufacturer
Part Number
Auto MDI-X
Number of Port
Bel Fuse
S558-5999-U7
Yes
1
Bel Fuse
SI-46001
Yes
1
Bel Fuse
SI-50170
Yes
1
Delta
LF8505
Yes
1
LanKom
LF-H41S
Yes
1
Pulse
H1102
Yes
1
Pulse (low cost)
H1260
Yes
1
Transpower
HB726
Yes
1
YCL
LF-H41S
Yes
1
Table 28. Qualified Single Port Magnetics
Selection of Reference Crystal
Chacteristics
Value
Units
Frequency
25.00000
MHz
Frequency tolerance (max)
±50
ppm
Load capacitance (max)
20
pF
Series resistance
25
Table 29. Typical Reference Crystal Characteristics
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