Datasheet

Valid Data
T2.5.1T2.5.1
T2.5.2
RX_CLK
RXD[3:0]
RX_DV
RX_ER
TX_CL
K
TXD[3:0
]
Valid Data
T2.4.2 T2.4.3
TX_EN
T2.4.1 T2.4.1
MDC
MDIO (output)
MDC
MDIO (input)
T2.3.4 T2.3.1
Valid Data
T2.3.2 T2.3.3
DP83849IF
SNOSAX8D –JUNE 2009–REVISED APRIL 2013 www.ti.com
4.7 AC Specifications — MII Serial Management Timing
Parameter Description Notes Min Typ Max Units
T2.3.1 MDC to MDIO (Output) Delay Time 0 30 ns
T2.3.2 MDIO (Input) to MDC Setup Time 10 ns
T2.3.3 MDIO (Input) to MDC Hold Time 10 ns
T2.3.4 MDC Frequency 2.5 25 MHz
4.8 AC Specifications — 100 Mb/s MII Transmit Timing
Parameter Description Notes Min Typ Max Units
T2.4.1 TX_CLK High/Low Time 100 Mb/s Normal mode 16 20 24 ns
T2.4.2 TXD[3:0], TX_EN Data Setup to 100 Mb/s Normal mode 10 ns
TX_CLK
T2.4.3 TXD[3:0], TX_EN Data Hold from 100 Mb/s Normal mode 0 ns
TX_CLK
4.9 AC Specifications — 100 Mb/s MII Receive Timing
(1)
Parameter Description Notes Min Typ Max Units
T2.5.1 RX_CLK High/Low Time 100 Mb/s Normal mode 16 20 24 ns
T2.5.2 RX_CLK to RXD[3:0], RX_DV, RX_ER 100 Mb/s Normal mode 10 30 ns
Delay
(1) RX_CLK may be held low or high for a longer period of time during transition between reference and recovered clocks. Minimum high
and low times will not be violated.
18 Electrical Specifications Copyright © 2009–2013, Texas Instruments Incorporated
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