KS8995X Micrel Inc, KS8995X Datasheet - Page 50

• Manufacturer Part Number: KS8995X
• Description: Special Function IC
• Manufacturer: Micrel Inc

Specifications of KS8995X

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• 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): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: 576-1021 - BOARD EVAL EXPERIMENT KS8995X
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant

KS8995X
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
M9999-120403
be compensated by increasing the line drive current by means of reducing the ISET resistor value.
Characteristics Name
Turns Ratio
Open-Circuit Inductance (min.)
Leakage Inductance (max.)
Inter-Winding Capacitance (max.)
D.C. Resistance (max.)
Insertion Loss (max.)
HIPOT (min.)
Pulse
Bel Fuse
YCL
Transpower
Delta
LanKom
Vendor
4-Port Integrated
H1164
558-5999-Q9
PH406466
HB826-2
LF8731
SQ-H48W
Part
MDIX
Auto
Yes
Yes
Yes
Yes
Yes
Yes
Value
1 CT : 1 CT
350 H
0.4 H
12pF
0.9
1.0dB
1500Vrms
Table 12. Qualified Magnetics Lists
(1)
Number
of Ports
4
4
4
4
4
4
50
Pulse
Bel Fuse
YCL
Transpower
Delta
LanKom
Vendor
Single-Port
Test Condition
100mV, 100 KHz, 8mA
1MHz (min.)
0MHz to 65MHz
H1102
S558-5999-U7
PT163020
HB726
LF8505
LF-H41S
Part
MDIX
Auto
Yes
Yes
Yes
Yes
Yes
Yes
December 2003
Number
of Ports
1
1
1
1
1
1
Micrel