LU3X54FT Datasheet, PDF (46/54 Pages) Agere Systems – QUAD-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX

LU3X54FT
QUAD-FET for 10Base-T/100Base-TX/FX
Data Sheet
July 2000
Timing Characteristics (Preliminary) (continued)
Table 31. Serial 10 Mbits/s Timing for TPIN, CRS, and RX_CLK
Name
t15
t16
t17
t18
Parameter
TPIN Activity to CRS Assertion
TPIN Activity to RX_CLK Valid
IDL to CRS Deassertion
Dead Signal to CRS Deassertion
Min
Max Unit
40
500
ns
800
2300 ns
200
550
ns
400
1000 ns
TPIN±
(RECEIVE—START OF PACKET)
(RECEIVE—DEAD SIGNAL)
(NOT IDL)
(RECEIVE—END OF PACKET)
IDL
CRS
t15
t17
t18
RX_CLK
t16
Figure 14. Serial 10 Mbits/s Timing for TPIN, CRS, and RX_CLK
Table 32. Serial 10 Mbits/s Timing for TX_EN, TPOUT, CRS, and RX_CLK
Name
t19
t20
t21
t22
t23
Parameter
TX_EN Asserted to Transmit Pair Activity
TX_EN Asserted to CRS Asserted Due to Internal Loopback
TX_EN Asserted to RX_CLK Valid Due to Internal Loopback
TX_EN Deasserted to IDL Transmission
IDL Pulse Width
Min
50
5
1000
50
250
5-5293(F).i
Max Unit
400 ns
1900 ns
1700 ns
300 ns
350 ns
TX_EN
(TRANSMIT—START OF PACKET)
(TRANSMIT—END OF PACKET)
TPOUT±
CRS
RX_CLK
t19
t20
t21
IDL
t22
t23
Figure 15. Serial 10 Mbits/s Timing for TX_EN, TPOUT, CRS, and RX_CLK
5-5293(F).j
46
Lucent Technologies Inc.