KS8995MI Micrel Inc, KS8995MI Datasheet - Page 75

• Manufacturer Part Number: KS8995MI
• Description: IC SWITCH 10/100 5PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8995MI

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Number Of Primary Switch Ports: 5
• Internal Memory Buffer Size: 64
• Operating Supply Voltage (typ): 1.8/2.5/3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII/SNI
• Power Supply Type: Analog/Digital
• Package Type: PQFP
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 1.9/2.6/3.6V
• Operating Supply Voltage (min): 1.7/2.4/3V
• Operating Temperature Classification: Industrial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: 576-1017 - BOARD EVAL EXPERIMENT KS8995M
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant
• Other names: 576-1020

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 100BaseTX assumes a transformer loss of 0.5dB. For the transmit line transformer, insertion loss of up to 1.3dB can
The following transformer vendors provide compatible magnetic parts for Micrel’s device:
June 2009
KS8995M
be compensated by increasing the line drive current by means of reducing the ISET resistor value.
Pulse
Bel Fuse
YCL
Transpower
Delta
LanKom
Characteristics Name
Turns Ratio
Open-Circuit Inductance (min.)
Leakage Inductance (max.)
Inter-Winding Capacitance (max.)
D.C. Resistance (max.)
Insertion Loss (max.)
HIPOT (min.)
Vendor
4-Port Integrated
H1164
558-5999-Q9
PH406466
HB826-2
LF8731
SQ-H48W
Part
MDIX
Auto
Yes
Yes
Yes
Yes
Yes
Yes
12pF
1.0dB
Value
1 CT : 1 CT
350µH
0.4µH
0.9Ω
1500Vrms
Table 24. Qualified Magnetics Lists
(1)
Number
of Ports
4
4
4
4
4
4
75
Pulse
Bel Fuse
YCL
Transpower
Delta
LanKom
Vendor
Test Condition
100mV, 100 KHz, 8mA
1MHz (min.)
0MHz to 65MHz
Single Port
H1102
S558-5999-U7
PT163020
HB726
LF8505
LF-H41S
Part
MDIX
Auto
Yes
Yes
Yes
Yes
Yes
Yes
M9999-062309
Micrel, Inc.
Number
of Ports
1
1
1
1
1
1