HBLXT9785HE.D0 Intel, HBLXT9785HE.D0 Datasheet - Page 115

• Manufacturer Part Number: HBLXT9785HE.D0
• Manufacturer: Intel

Specifications of HBLXT9785HE.D0

• Lead Free Status / RoHS Status: Not Compliant

LXT9785/LXT9785E
Datasheet
249241, Revision 11.0
16 April 2007
Figure 7
4.2.1.1
Cortina Systems
Interface Signals
Twisted-Pair Interface
The LXT9785/LXT9785E supports either 100BASE-TX or 10BASE-T connections over
100 Ω, Category 5, Unshielded Twisted-Pair (UTP). Only a transformer, RJ-45, and
bypass capacitors are required to complete this interface. Using waveshaping technology,
the transmitter shapes the outgoing signal to help reduce the need for external EMI filters.
Four slew rate settings (refer to
page
Both transmit and receive terminations are built into the LXT9785/LXT9785E so no
external components are required between the LXT9785/LXT9785E 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 LXT9785/LXT9785E generates “IDLE” symbols.
During 10 Mbps operation, LXT9785/LXT9785E encoded data is exchanged. When no
data are being exchanged, the line is left in an idle state with NLPs transmitted to maintain
link.
®
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
43) allow the designer to match the output waveform to the magnetic characteristics.
Management
Port LEDs/
Interface
Interface
Controls
Addr &
MDIX/
DATA
MDIO
Contr
Table 13, Miscellaneous Signal Descriptions – PQFP, on
Direct Drive
TXENn
TXDn_0
TXDn_1
TXCLK
RXCLK
RXDn_1
RXDn_0
RXERn
CRS_DVn
MDIOn
MDCn
MDINTn
MDDIS
LEDn_1
LEDn_2
LEDn_3
MDIX_Enb
Mode Select
ADD[4:0]
TPFIPn
TPFINn
TPFOPn
TPFONn
VCCD
GNDD
VCCIO
B3369-01
.01uF
+3.3V
+2.5V
+2.5V
4.2 Interface Descriptions
OR
Network
Interface
Page 115