KSZ8041NLJ_10 MICREL [Micrel Semiconductor], KSZ8041NLJ_10 Datasheet - Page 42

• Manufacturer Part Number: KSZ8041NLJ_10
• Description: 10/100 Ethernet Transceiver with Extended Temperature Support
• 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.
The Pulse Engineering device in the following table gives the recommended transformer configuration. At the time of
publication, there is no extended high temperature magnetic available. Contact magnetic vendor for availability of
extended high temperature rated (-40
Selection of Reference Crystal
April 2010
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
Pulse Engineering
Table 16. Single Port Magnetic – Recommended Transformer Configuration
Table 17. Typical Reference Crystal Characteristics
o
C to +125
Table 15. Transformer Selection Criteria
Part Number
HX1188NL
o
C) transformer.
Value
1 CT : 1 CT
350µH
0.4µH
12pF
0.9Ω
-1.0dB
1500Vrms
Value
42
±50
25
22
40
Auto MDI-X
Yes
Test Condition
100mV, 100kHz, 8mA
1MHz (min.)
0MHz – 65MHz
Number of Port
1
Units
MHz
ppm
pF
Ω
M9999-040110-1.0
KSZ8041NLJ