KSZ8873MLLI Micrel Inc, KSZ8873MLLI Datasheet - Page 101

• Manufacturer Part Number: KSZ8873MLLI
• Description: IC ETHERNET SWITCH 3PORT 64LQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8873MLLI

• Controller Type: Ethernet Switch Controller
• Interface: MII
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Number Of Primary Switch Ports: 3
• Internal Memory Buffer Size: 32
• Fiber Support: No
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII
• Power Supply Type: Analog
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 1.89/3.465V
• Operating Temperature Classification: Industrial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

Micrel, Inc.
Selection of Isolation Transformers
An 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
September 2009
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 (MagJack)
Bel Fuse (MagJack)
Delta
LanKom
Pulse
Pulse (low cost)
Transpower
YCL
TDK (Mag Jack)
Table 33. Typical Reference Crystal Characteristics
Table 32. Qualified Single Port Magnetics
Table 31. Transformer Selection Criteria
Part Number
S558-5999-U7
SI-46001
SI-50170
LF8505
LF-H41S
H1102
H1260
HB726
LF-H41S
TLA-6T718
Value
1 CT : 1 CT
350μH
0.4μH
12pF
0.9Ω
1.0dB
1500Vrms
Value
25.00000
±50
20
25
101
Auto MDI-X
Yes
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
1
KSZ8873MLL/FLL/RLL
M9999-092309-1.2