KSZ8993M Micrel Inc, KSZ8993M Datasheet - Page 85

• Manufacturer Part Number: KSZ8993M
• Description: IC SWITCH 10/100 3PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8993M

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Number Of Primary Switch Ports: 3
• Internal Memory Buffer Size: 32
• 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 Supply Voltage (max): 1.89/3.465V
• Operating Supply Voltage (min): 1.71/3.135V
• Power Dissipation: 800mW
• Supply Current: 0.1/0.19A
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-1037

Selection of Isolation Transformers
A 1:1 isolation transformer is required 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.
Selection of Reference Crystal
Micrel, Inc.
October 2008
Parameter
Turns ratio
Open-circuit inductance (min.)
Leakage inductance (max.)
Inter-winding capacitance (max.)
D.C. resistance (max.)
Insertion loss (max.)
HIPOT (min.)
Chacteristics
Frequency
Frequency tolerance (max)
Load capacitance (max)
Series resistance
Magnetic Manufacturer
Bel Fuse
Bel Fuse
Bel Fuse
Delta
LanKom
Pulse
Pulse (low cost)
Transpower
YCL
Table 29. Typical Reference Crystal Characteristics
Table 28. Qualified Single Port Magnetics
Table 27. Transformer Selection Criteria
Part Number
S558-5999-U7
SI-46001
SI-50170
LF8505
LF-H41S
H1102
H1260
HB726
LF-H41S
Value
1 CT : 1 CT
350µH
0.4µH
12pF
0.9Ω
1.0dB
1500Vrms
Value
25.00000
±50
20
25
85
Auto MDI-X
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Test Condition
100mV, 100kHz, 8mA
1MHz (min.)
0MHz – 65MHz
Units
MHz
ppm
pF
Ω
Number of Port
1
1
1
1
1
1
1
1
1
M9999-020606
KSZ8993M/ML