LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
Figure 34. 10BASE-T Jabber and Unjabber Timing
TX_EN
TXD
t
1
t
2
COL
Table 35. 10BASE-T Jabber and Unjabber Timing Parameters
1
Parameter
Symbol
Min
Typ
Max
Units
Test Conditions
Maximum transmit time
Unjab time
t1
t2
20
–
–
150
750
ms
ms
–
–
250
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
testing.
Figure 35. 10BASE-T SQE (Heartbeat) Timing
TX_CLK
TX_EN
COL
t1
t2
Table 36. 10BASE-T SQE Timing Parameters
1
Parameter
Symbol
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
us
us
–
–
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
testing.
Datasheet
67
Document #: 249414
Revision #: 002
Rev. Date: August 7, 2002
INTEL [ INTEL ]
