lxt9781 Intel Corporation, lxt9781 Datasheet - Page 57

• Manufacturer Part Number: lxt9781
• Description: Fast Ethernet 10/100 Multi-port Transceiver With Rmii
• Manufacturer: Intel Corporation

Datasheet
TXD<1:0> setup to REFCLK rising edge
TXD<1:0> hold from REFCLK rising edge
TX_EN sampled to TPFO out (Tx latency)
TX_EN setup to REFCLK rising edge
TX_EN hold from REFCLK rising edge
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
RXD(1:0)
Figure 29. 100BASE-FX Transmit Timing
Table 26. 100BASE-FX Transmit Timing Parameters
Figure 30. 10BASE-T Receive Timing
CRS_DV
REFCLK
TXD(1:0)
REFCLK
TX_EN
TPFI
TPFO
Parameter
t
4
t
3
Fast Ethernet 10/100 Multi-Port Transceiver with RMII — LXT9761/9781
t
3
Sym
t1
t2
t3
t4
t5
t
1
t
1
t
2
Min
t
4
2
–
4
2
2
Typ
13
–
–
–
–
1
Max
–
–
–
–
–
t
4
Units
BT
ns
ns
ns
ns
Test Conditions
t
5
–
–
–
–
–
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