參數(shù)資料
型號(hào): LXT972A
廠商: Intel Corp.
英文描述: 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
中文描述: 3.3雙速快速以太網(wǎng)收發(fā)器數(shù)據(jù)表
文件頁(yè)數(shù): 48/70頁(yè)
文件大小: 833K
代理商: LXT972A
LXT972A
3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
48
Datasheet
Figure 25. 100BASE-TX Transmit Timing - 4B Mode
Table 26. 100BASE-TX Transmit Timing Parameters
-
4B Mode
Parameter
Sym
Min
Typ
1
Max
Units
2
Test Conditions
TXD<3:0>, TX_EN, TX_ER setup to TX_CLK High
t1
12
ns
TXD<3:0>, TX_EN, TX_ER hold from TX_CLK High
t2
0
ns
TX_EN sampled to CRS asserted
t3
20
24
BT
TX_EN sampled to CRS de-asserted
t4
24
28
BT
TX_EN sampled to TPO out (Tx latency)
t5
5.3
5.7
BT
1. Typical values are at 25
°
C and are for design aid only; not guaranteed and not subject to production testing.
2. BT is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit rate. 100BASE-T bit time = 10
-
s or 10 ns.
t1
t2
t5
t3
t4
0ns
250ns
TXCLK
TX_EN
TXD<3:0>
TPO
CRS
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