POEPHYTEREV-I National Semiconductor, POEPHYTEREV-I Datasheet - Page 68
POEPHYTEREV-I
Manufacturer Part Number
POEPHYTEREV-I
Description
BOARD EVAL LM5072, DP83848I
Manufacturer
National Semiconductor
Series
PHYTER®r
Datasheets
1.DP83848IVVNOPB.pdf
(84 pages)
2.LM5072MHX-50NOPB.pdf
(26 pages)
3.DP83848C-MAU-EK.pdf
(18 pages)
Specifications of POEPHYTEREV-I
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
DP83848, LM5072
Lead Free Status / RoHS Status
Not applicable / Not applicable
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8.2.7 100BASE-TX Transmit Packet Deassertion Timing
Note: Deassertion is determined by measuring the time from the first rising edge of TX_CLK occurring after the deasser-
tion of TX_EN to the first bit of the “T” code group as output from the PMD Output Pair. 1 bit time = 10 ns in 100 Mb/s mode.
T2.7.1
Parameter
PMD Output Pair
TX_CLK to PMD Output Pair
Deassertion
TX_CLK
TX_EN
TXD
Description
DATA
DATA
100 Mb/s Normal mode
T2.7.1
68
Notes
(T/R)
(T/R)
IDLE
IDLE
Min
Typ
6
Max
Units
bits
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