lxt9763 Intel Corporation, lxt9763 Datasheet - Page 54

• Manufacturer Part Number: lxt9763
• Description: Fast Ethernet 10/100 Hex Transceiver With Full Mii
• Manufacturer: Intel Corporation

LXT9763 — Fast Ethernet 10/100 Hex Transceiver with Full MII
54
TXD, TX_EN, TX_ER setup to TX_CLK High
TXD, TX_EN, TX_ER hold from TX_CLK High
TX_EN sampled to CRS asserted
TX_EN sampled to CRS de-asserted
TX_EN sampled to TPFO out (Tx latency)
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
Figure 27. 10BASE-T Transmit Timing
TX_EN,
Table 29. 10BASE-T Transmit Timing Parameters
Figure 28. 10BASE-T SQE (Heartbeat) Timing
TX_ER
TX_CLK
TPFO
TXD,
TX_CLK
CRS
TX_EN
COL
Parameter
t
1
t
3
t
5
Sym
t1
t2
t3
t4
t5
t
1
Min
10
0
–
–
–
t
2
Typ
280
–
–
2
1
1
t
2
Max
–
–
–
–
–
t
4
Units
BT
BT
ns
ns
ns
Test Conditions
–
–
–
–
–
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