參數(shù)資料
型號: KSZ8041MLL TR
廠商: Micrel Inc
文件頁數(shù): 59/65頁
文件大小: 0K
描述: TXRX 10/100 3.3V PHY MII 48LQFP
標準包裝: 1,000
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: MII
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP
供應商設備封裝: 48-TQFP(7x7)
包裝: 帶卷 (TR)
Micrel, Inc.
KSZ8041TL/FTL/MLL
December 2009
62
M9999-120909-1.2
Selection of Isolation Transformer
A 1:1 isolation transformer is required at the line interface. An isolation transformer with integrated common-mode chokes
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.)
350μH
100mV, 100kHz, 8mA
Leakage inductance (max.)
0.4μH
1MHz (min.)
Inter-winding capacitance (typ.)
12pF
D.C. resistance (typ.)
0.9
Insertion loss (max.)
-1.0dB
0MHz – 65MHz
HIPOT (min.)
1500Vrms
Table 24. Transformer Selection Criteria
Magnetic Manufacturer
Part Number
Auto MDI-X
Number of Port
Bel Fuse
S558-5999-U7
Yes
1
Bel Fuse (Mag Jack)
SI-46001
Yes
1
Bel Fuse (Mag Jack)
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
TDK (Mag Jack)
TLA-6T718
Yes
1
Table 25. Qualified Single Port Magnetics
Selection of Reference Crystal
Characteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
r50
ppm
Load capacitance
20
pF
Series resistance
40
Table 26. Typical Reference Crystal Characteristics
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