Datasheet

9.0 Electrical Specifications (Continued)

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9.4.6 100BASE-TX Receive Packet Latency Timing

Note: Carrier Sense On Delay is determined by measuring the time from the first bit of the “J” code group to the assertion of Carrier Sense.

Note: 1 bit time = 10 ns in 100 Mb/s mode.

Note: TPRD± voltage amplitude is greater than the Signal Detect Turn-On Threshold Value.

9.4.7 100BASE-TX Receive Packet Deassertion Timing

Note: Carrier Sense Off Delay is determined by measuring the time from the first bit of the “T” code group to the deassertion of Carrier Sense.

Note: 1 bit time = 10 ns in 100 Mb/s mode.

Parameter Description Notes Min Typ Max Units

T4.6.1 Carrier Sense on Delay 100 Mb/s Normal mode 17.5 bits

T4.6.2 Receive Data Latency 100 Mb/s Normal mode 21 bits

100 Mb/s Symbol mode 12 bits

Parameter Description Notes Min Typ Max Units

T4.7.1 Carrier Sense Off Delay 100 Mb/s Normal mode 21.5 bits

CRS

RXD[3:0]

TPRD+/-

RX_DV

RX_ER/RXD[4]

(J/K)

IDLE

DATA

T4.6.1

T4.6.2

CRS