參數(shù)資料
型號(hào): KSZ8041FTL TR
廠商: Micrel Inc
文件頁(yè)數(shù): 52/58頁(yè)
文件大?。?/td> 0K
描述: TXRX PHY 10/100 SGL LP 48TQFP
標(biāo)準(zhǔn)包裝: 1,000
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: SMII
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(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 帶卷 (TR)
Micrel, Inc.
KSZ8041TL/FTL
April 2007
56
M9999-042707-1.1
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.)
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 23. 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 24. Qualified Single Port Magnetics
Selection of Reference Crystal
Characteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
±50
ppm
Load capacitance (max)
20
pF
Series resistance
40
Table 25. Typical Reference Crystal Characteristics
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