DP83848C-POE-EK National Semiconductor, DP83848C-POE-EK Datasheet - Page 74

• Manufacturer Part Number: DP83848C-POE-EK
• Description: BOARD EVALUATION DP83848C
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of DP83848C-POE-EK

• Main Purpose: Special Purpose DC/DC, Power Over Ethernet
• Outputs And Type: 1, Isolated
• Power - Output: 24W
• Voltage - Output: 3.3V
• Current - Output: 7.3A
• Voltage - Input: 39 ~ 57V
• Regulator Topology: Flyback
• Frequency - Switching: 250kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM5072
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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8.2.17 10BASE-T Receive Timing (Start of Packet)
Note: 10BASE-T RX_DV Latency is measured from first bit of preamble on the wire to the assertion of RX_DV
Note: 1 bit time = 100 ns in 10 Mb/s mode.
8.2.18 10BASE-T Receive Timing (End of Packet)
T2.17.1
T2.17.2
T2.17.3
T2.18.1
Parameter
Parameter
RXD[3:0]
RX_CLK
RX_DV
TPRD
CRS
PMD Input Pair
Carrier Sense Turn On Delay (PMD
Input Pair to CRS)
RX_DV Latency
Receive Data Latency
Carrier Sense Turn Off Delay
RX_CLK
CRS
1
Description
Description
T2.17.1
0
0000
T2.17.2
1
0
1
1
0
1
Measurement shown from SFD
0
0
Preamble
74
1st SFD bit decoded
1
0
Notes
Notes
1
1
T2.17.3
1
IDLE
T2.18.1
SFD
Min
Min
Typ
Typ
630
10
8
1000
Max
Max
1.0
Data
Units
Units
bits
bits
ns
s