FLLXT971A Intel, FLLXT971A Datasheet - Page 66

• Manufacturer Part Number: FLLXT971A
• Description: 3.3V Dual Speed Fast Ethernet PHY Transceicer
• Manufacturer: Intel

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LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
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Figure 33. 10BASE-T Transmit Timing
Table 34. 10BASE-T Transmit Timing Parameters
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
2. BT is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit rate.
testing.
10BASE-T bit time = 10
TX_EN,
TX_ER
TX_CLK
TPFO
TXD,
CRS
Parameter
t
1
-7
s or 100 ns.
t
3
t
5
Symbol
t1
t2
t3
t4
t5
Min
10
0
–
–
–
Typ
72.5
t
2
–
–
2
1
1
Max
–
–
–
–
–
t
4
Units
BT
BT
BT
ns
ns
Rev. Date: August 7, 2002
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Document #: 249414
Test Conditions
Revision #: 002
Datasheet
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