DP83848C-POE-EK National Semiconductor, DP83848C-POE-EK Datasheet - Page 68
DP83848C-POE-EK
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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8.2.7 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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