SLXT973QE Cortina Systems Inc, SLXT973QE Datasheet - Page 24

• Manufacturer Part Number: SLXT973QE
• Manufacturer: Cortina Systems Inc

Specifications of SLXT973QE

• Lead Free Status / RoHS Status: Not Compliant

LXT973 Transceiver
Datasheet
249426, Revision 6.0
13 July 2007
Figure 3
3.2.1.1
Cortina Systems
Interfaces
Twisted-Pair Interface
The LXT973 Transceiver supports either 100BASE-TX or 10BASE-T connections over
100Ω, Category 5, Unshielded Twisted-Pair (UTP). Only a transformer, RJ-45, and bypass
capacitors are required to complete this interface. The transmitter shapes the outgoing
signal to help reduce the need for external EMI filters. Four slew rate settings allow the
designer to match the output waveform to the magnetic characteristics. Both transmit and
receive terminations are built into the LXT973 Transceiver. Therefore, no external
components are required between the LXT973 Transceiver and the external transformer.
The transmitter uses a transformer with a center tap to help reduce power consumption.
When operating at 100 Mbps, MLT3 symbols are continuously transmitted and received.
When not transmitting data, the LXT973 Transceiver generates “IDLE” symbols.
During 10 Mbps operation, LXT973 Transceiver encoded data is exchanged. When no
data is exchanged, the line transmits normal link pulses to maintain link.
®
LXT973 10/100 Mbps Dual-Port Fast Ethernet PHY Transceiver
Management
Interface
Interface
Port LED's
Address /
DATA
MDIO
Control
TXERn
Direct Drive
TXDn<3:0>
TXCLKn
TXENn
RXCLKn
RXDn<3:0>
RXDVn
RXERn
CRSn
COLn
Fiber_TPn
ADDR<4:1>
MDDISn
MDIOn
MDCn
LEDn_1
LEDn_2
LEDn_3
DPAP/N_0
DPBP/N_0
DPBP/N_1
DPAP/N_1
VCCIO
GNDD
VCCD
.01 uF
+3.3 V
+2.5 V
+2.5 V
OR
Interface
Network
3.2 Interface Descriptions
Page 24