SLXT970AQC.B11-831643 Cortina Systems Inc, SLXT970AQC.B11-831643 Datasheet - Page 20

• Manufacturer Part Number: SLXT970AQC.B11-831643
• Manufacturer: Cortina Systems Inc

Specifications of SLXT970AQC.B11-831643

• Number Of Receivers: 1
• Data Rate: 10/100Mbps
• Operating Supply Voltage (typ): 5V
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 4.75V
• Mounting: Surface Mount
• Pin Count: 64
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Lead Free Status / RoHS Status: Not Compliant

Intel
2.2.3
2.2.3.1
20
Figure 4. MII Interface
®
LXT970A Dual-Speed Fast Ethernet Transceiver
The LXT970A Transceiver does not support the Signal Detect Function. However, the PMA
functions of the LXT970A Transceiver guarantee that it will detect invalid link conditions and
break down a link, even without the Signal Detect function.
In applications where the Fiber Interface is not used, the inputs and outputs may be left
unconnected. The Fiber Interface is disabled in power down mode and when the Twisted-Pair
Interface is enabled. When the Fiber Interface is disabled its outputs are pulled to ground.
MII Interface
The LXT970A Transceiver implements the Media Independent Interface (MII) as defined in the
IEEE 802.3. This interface consists of a data interface and a management interface as shown in
Figure
Ethernet Media Access Controller (MAC) and the LXT970A Transceiver. The management
portion of the interface allows network management functions to control and monitor the
LXT970A Transceiver.
Selectable Driver Levels
The LXT970A Transceiver supports two options for driver-strength capabilities that can be
selected via bit 17.3.
High-strength (bit 17.3 = 0, default) MII driver level can effectively source 50 - 60 mA. To avoid
undershoot or overshoot, series termination resistors are recommended on all output signals when
this driver level is selected.
Reduced (bit 17.3 = 1) MII driver level relaxes the pull-down strength of the MII signals by a
factor of ten and the pull-up strength by a factor of eight. Termination resistors are not required on
the MII outputs when this driver level is selected.
Mgmt
4. The data interface is used for exchanging data between a 10/100 802.3 compliant
Media Independent
Interface (MII)
Media Access Controller
LXT970A
Data
Datasheet