LU3X54FT Datasheet, PDF (48/54 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 34. Serial 10 Mbits/s Timing for RX_CLK, CRS, RXD, TX_CLK, TX_EN, and TXD (25 pF Load)
Name
t29
t30
t31
t32
t33
t34
t35
Parameter
RXD Setup Before RX_CLK Rising Edge
RXD Held Past RX_CLK Edge
RX_CLK Low to CRS Deassertion (at end of received packet)
TX_EN Setup Before TX_CLK Rising Edge
TX_EN Held Past TX_CLK Rising Edge
TXD Setup Before TX_CLK Rising Edge
TXD Held Past TX_CLK Rising Edge
Min Max Unit
30
— ns
30
— ns
40
— ns
30
— ns
0
— ns
30
— ns
0
— ns
RX_CLK
CRS
RXD
t29
(START OF PACKET)
t31
t30
(END OF PACKET)
TX_CLK
t32
TX_EN
t34
TXD
t33
t35
LAST BIT
5-2736(F).dr1
Figure 17. Serial 10 Mbits/s Timing for RX_CLK, CRS, RXD, TX_CLK, TX_EN, and TXD
48
Lucent Technologies Inc.