KS8995MAL Micrel Inc, KS8995MAL Datasheet - Page 72

• Manufacturer Part Number: KS8995MAL
• Description: IC SWITCH 10/100 5PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8995MAL

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• For Use With: 576-1017 - BOARD EVAL EXPERIMENT KS8995M
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

KS8995MA
Selection of Isolation Transformer
One simple 1:1 isolation transformer is needed 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.
Note:
1. The IEEE 802.3u standard for 100BASE-TX assumes a transformer loss of 0.5dB. For the transmit line transformer, insertion loss of up to 1.3dB
The following transformer vendors provide compatible magnetic parts for Micrel’s device:
M9999-051305
Characteristics Name
Turns Ratio
Open-Circuit Inductance (min.)
Leakage Inductance (max.)
Inter-Winding Capacitance (max.)
D.C. Resistance (max.)
Insertion Loss (max.)
Hipot (min.)
can be compensated by increasing the line drive current by means of reducing the I
Pulse
Bel Fuse
YCL
Transpower
Delta
LanKom
Vendor
4-Port Integrated Auto
H1164
558-5999-Q9
PH406466
HB826-2
LF8731
SQ-H48W
Part
Number
MDI-X
Yes
Yes
Yes
Yes
Yes
Yes
Table 24. Qualified Magnetics Vendors
Value
1 CT : 1 CT
350µH
0.4µH
12pF
0.9Ω
1.0dB
1500Vrms
(1)
of Port
4
4
4
4
4
4
72
Pulse
Bel Fuse
YCL
Transpower
Delta
LanKom
Single Port
Vendor
SET
Test Condition
100mV, 100kHz, 8mA
1MHz (min.)
0MHz to 65MHz
resistor value.
AutoNumber
H1102
S558-5999-U7
PT163020
LF8505
LF-H41S
HB726
Part
MDI-X
Yes
Yes
Yes
Yes
Yes
Yes
Micrel, Inc.
May 2005
of Port
1
1
1
1
1
1