KSZ8041NLAM MICREL [Micrel Semiconductor], KSZ8041NLAM Datasheet - Page 44

• Manufacturer Part Number: KSZ8041NLAM
• Description: 10Base-T/100Base-TX Physical Layer Transceiver
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
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.
Selection of Reference Crystal
July 2008
Parameter
Turns ratio
Open-circuit inductance (min.)
Leakage inductance (max.)
Inter-winding capacitance (max.)
D.C. resistance (max.)
Insertion loss (max.)
HIPOT (min.)
Characteristics
Frequency
Frequency tolerance (max)
Load capacitance (max)
Series resistance
Magnetic Manufacturer
Bel Fuse
Bel Fuse (Mag Jack)
Bel Fuse (Mag Jack)
Delta
LanKom
Pulse
Pulse (low cost)
Transpower
TDK (Mag Jack)
Table 17. Typical Reference Crystal Characteristics
Table 16. Qualified Single Port Magnetics
Table 15. Transformer Selection Criteria
Part Number
S558-5999-U7
SI-46001
SI-50170
LF8505
LF-H41S
H1102
H1260
HB726
TLA-6T718
Value
1 CT : 1 CT
350μH
0.4μH
12pF
0.9Ω
1.0dB
1500Vrms
Value
44
±50
25
20
40
Auto MDI-X
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Test Condition
100mV, 100kHz, 8mA
1MHz (min.)
0MHz – 65MHz
Number of Port
1
1
1
1
1
1
1
1
1
Units
MHz
ppm
pF
Ω
M9999-071808-1.2
KSZ8041NL