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

• 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