SLXT970AQC.B11-831643 Cortina Systems Inc, SLXT970AQC.B11-831643 Datasheet - Page 45

• 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

3.3.7
3.3.7.1
Datasheet
Figure 20. Voltage Divider
Typical Application
Figure 21 on page 46
groups similar pins; it does not portray the actual chip pinout. The Media Independent Interface
(MII) pins are at the upper left. Hardware Control Interface pins are center left. The line interface
pins for twisted-pair and fiber are shown on the top and bottom right respectively.
The VCCD and VCCIO pins are at the bottom of the diagram. VCCT, VCCR, and VCCA are at the
center right. All VCC pins (except VCCIO) use a single power supply. VCCIO may be powered by
a 3.3V supply, and may be separately connected.
Voltage Divider For MF Inputs
The LXT970A Transceiver requires an external voltage divider to provide optional (V
V
V
multiple PHYs.
between VCC and Ground.
MF
MF
3) multi-level inputs to the Multi-Function (MF) pins. These voltage levels are designated as
1 - V
MF
+5V
4. A single voltage divider may be used to drive the MF pins in designs using
Figure 20
V
MF
1
is typical interface circuitry of the LXT970A Transceiver. The diagram
1k
V
MF
shows a voltage divider with three 1 k
2
1k
V
MF
Intel
3
1k
V
MF
®
4
LXT970A Dual-Speed Fast Ethernet Transceiver
Ω
resistors configured in series
MF
2 and
45