LU3X54FT Datasheet, PDF (47/54 Pages) Agere Systems – QUAD-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX

Data Sheet
July 2000
LU3X54FT
QUAD-FET for 10Base-T/100Base-TX/FX
Timing Characteristics (Preliminary) (continued)
Table 33. Serial 10 Mbits/s Timing for TX_EN, TPIN, and COL
Name
Parameter
Min
t24 Time to Assert COL; LU3X54FT Is Transmitting; Receive Activity Starts
40
t25 Time to Deassert COL; LU3X54FT Is Transmitting; Receive Activity Ceases 300
t26 Time to Assert COL; LU3X54FT Is Receiving; Transmit Activity Starts
5
t27 Time to Deassert COL; LU3X54FT Is Receiving; Transmit Activity Ceases
5
t28 COL Pulse Width
100
Max Unit
400 ns
900 ns
400 ns
900 ns
— ns
TX_EN
(TRANSMITTING—RECEIVE COLLISION DETECTED)
(RECEIVING—TRANSMIT COLLISON DETECTED)
TPIN±
COL
IDL
t24
t25
t26
t28
Figure 16. Serial 10 Mbits/s Timing for TX_EN, TPIN, and COL
t27
5-5293(F).k
Lucent Technologies Inc.
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