NLXT905PE.C2 Cortina Systems Inc, NLXT905PE.C2 Datasheet - Page 13

• Manufacturer Part Number: NLXT905PE.C2
• Manufacturer: Cortina Systems Inc

Specifications of NLXT905PE.C2

• Number Of Receivers: 1
• Data Rate: 10Mbps
• Operating Supply Voltage (typ): 5V
• Package Type: PLCC
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): 5.25V
• Mounting: Surface Mount
• Pin Count: 28
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Lead Free Status / Rohs Status: Not Compliant

LXT905 Transceiver
Datasheet
249271, Revision 5.1
5 November 2007
2.8
Figure 6
Cortina Systems
Polarity correction is always enabled.
Collision Detection Function
A collision is the simultaneous presence of valid signals on both the TPI circuit and the
TPO circuit. The LXT905 Transceiver reports collisions to the back-end via the COL pin. If
the TPI circuit becomes active while there is activity on the TPO circuit, the TPI data
passes to the back-end over the RXD circuit, disabling normal loopback.
state diagram of the LXT905 Transceiver collision detection function.
Collision Detection Function
®
• Reversed polarity also occurs if the LXT905 Transceiver receives four consecutive
• Whenever the LXT905 Transceiver receives a correct polarity frame or a correct link
• If the LXT905 Transceiver enters the link fail state, and does not receive any valid
LXT905 Universal 10BASE-T Transceiver with 3.3 V Support
frames with a reversed start-of-idle.
pulse, it resets these two counters to zero.
data or link pulses within 96 to 128 ms, it resets the polarity to the default non-flipped
condition.
TEN=Idle +
XMIT=Disable
RXD=TXD
TPO=TXD
A
Output
TEN=Active ∗
TPI=Idle ∗
XMIT=Enable
TEN=Active ∗
TPI=Idle
TEN=Active ∗
TPI=Active ∗
XMIT=Enable
COL=ACTIVE
TPO=TXD
Collision
RXD=TPI
A
Idle
Power On
TEN=Active ∗
TPI=Active ∗
XMIT=Enable
TEN=Idle
TPI=Active
RXD=TPI
Input
TPI=Idle
2.8 Collision Detection Function
A
Figure 6
is a
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