Fast Ethernet 10/100 Hex Transceiver with Full MII — LXT9763
Table 30. 10BASE-T SQE (Heartbeat) Timing Parameters
1
Parameter
Sym
Min
Typ
Max
Units
Test Conditions
COL (SQE) delay after TX_EN off
COL (SQE) pulse duration
t1
t2
0.65
0.5
–
–
1.6
1.5
µs
µs
–
–
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
Figure 29. 10BASE-T Jab and Unjab Timing
TX_EN
t
1
TXD
COL
t
2
Table 31. 10BASE-T Jab and Unjab Timing Parameters
1
Parameter
Sym
Min
Typ
Max
Units
Test Conditions
Maximum transmit time
Unjab time
t1
t2
20
–
–
150
750
ms
ms
–
–
–
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
Figure 30. Auto Negotiation and Fast Link Pulse Timing
Clock Pulse
Data Pulse
Clock Pulse
TPFOP
t1
t1
t3
t2
Datasheet
55
INTEL [ INTEL ]
