KSZ8851-16MLLI Micrel Inc, KSZ8851-16MLLI Datasheet - Page 19

• Manufacturer Part Number: KSZ8851-16MLLI
• Description: 10/100BT Ethernet MAC + PHY With Generic (8, 16-bit) Bus Interface (I-Temp)
• Manufacturer: Micrel Inc

Specifications of KSZ8851-16MLLI

• Controller Type: Ethernet Controller, MAC/PHY
• Interface: Bus
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3505

Auto Negotiation
The KSZ8851-16MLL conforms to the auto negotiation protocol as described by the 802.3 committee to allow the port to
operate at either 10Base-T or 100Base-TX.
Auto negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In auto
negotiation, the link partners advertise capabilities across the link to each other. If auto negotiation is not supported or the
link partner to the KSZ8851-16MLL is forced to bypass auto negotiation, the mode is set by observing the signal at the
receiver. This is known as parallel mode because while the transmitter is sending auto negotiation advertisements, the
receiver is listening for advertisements or a fixed signal protocol.
The link setup is shown in the following flow diagram (Figure 5).
August 2009
Micrel, Inc.
Media Dependent Interface
Modular Connector (RJ-45)
Transmit Pair
Receive Pair
(Repeater or Switch)
10/100 Ethernet
Figure 4. Typical Crossover Cable Connection
HUB
1
2
3
4
5
6
7
8
Crossover
Cable
19
Media Dependent Interface
Modular Connector (RJ-45)
(Repeater or Switch)
1
2
3
4
5
6
7
8
10/100 Ethernet
Transmit Pair
HUB
Receive Pair
KSZ8851-16MLL/MLLI
M9999-083109-2.0