KS8893ML MICREL [Micrel Semiconductor], KS8893ML Datasheet - Page 105
![no-image](/images/no-image-200.jpg)
KS8893ML
Manufacturer Part Number
KS8893ML
Description
Integrated 3-Port 10/100 Managed Switch with PHYs Preliminary Data Sheet Rev. 1.0
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
1.KS8893ML.pdf
(106 pages)
- Current page: 105 of 106
- Download datasheet (650Kb)
Selection of Isolation Transformers
An 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.
Selection of Reference Crystal
June 2005
Parameter
Turns ratio
Open-circuit inductance (min.)
Leakage inductance (max.)
Inter-winding capacitance (max.)
D.C. resistance (max.)
Insertion loss (max.)
HIPOT (min.)
Chacteristics
Frequency
Frequency tolerance (max)
Load capacitance (max)
Series resistance
Magnetic Manufacturer
Bel Fuse
Bel Fuse (MagJack)
Bel Fuse (MagJack)
Delta
LanKom
Pulse
Pulse (low cost)
Transpower
YCL
Table 34. Typical Reference Crystal Characteristics
Table 33. Qualified Single Port Magnetics
Table 32. Transformer Selection Criteria
Part Number
S558-5999-U7
SI-46001
SI-50170
LF8505
LF-H41S
H1102
H1260
HB726
LF-H41S
Value
1 CT : 1 CT
350µH
0.4µH
12pF
0.9Ω
1.0dB
1500Vrms
Value
25.00000
±50
20
25
105
Auto MDI-X
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Test Condition
100mV, 100kHz, 8mA
1MHz (min.)
0MHz – 65MHz
Units
MHz
ppm
pF
Ω
Number of Port
1
1
1
1
1
1
1
1
1
M9999-063005
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