参数资料
型号: KSZ8041MNLU TR
厂商: Micrel Inc
文件页数: 49/54页
文件大小: 0K
描述: TXRX PHY 100BASE TX 3.3V 32QFN
标准包装: 1
类型: PHY 收发器
驱动器/接收器数: 5/5
规程: MII,RMII
电源电压: 3.3V
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘,32-MLF?
供应商设备封装: 32-MLF?(5x5)
包装: 标准包装
其它名称: 576-3744-6
Micrel, Inc.
KSZ8041NL/RNL
September 2010
53
M9999-090910-1.4
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 Table 17 gives recommended transformer characteristics.
Parameter
Value
Test Condition
Turns ratio
1 CT : 1 CT
Open-circuit inductance (min.)
350
μH
100mV, 100kHz, 8mA
Leakage inductance (max.)
0.4
μH
1MHz (min.)
Inter-winding capacitance (typ.)
12pF
D.C. resistance (typ.)
0.9
Ω
Insertion loss (max.)
-1.0dB
0MHz – 65MHz
HIPOT (min.)
1500Vrms
Table 17. 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 18. Qualified Single Port Magnetics
Selection of Reference Crystal
Characteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
±50
ppm
Load capacitance
20
pF
Series resistance
40
Ω
Table 19. Typical Reference Crystal Characteristics
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