參數(shù)資料
型號(hào): LXT970A
廠商: Intel Corp.
英文描述: Dual-Speed Fast Ethernet Transceiver
中文描述: 雙速度快速以太網(wǎng)收發(fā)器
文件頁數(shù): 59/74頁
文件大?。?/td> 1061K
代理商: LXT970A
Dual-Speed Fast Ethernet Transceiver
LXT970A
Datasheet
59
Figure 30. 10BASE-T SQE (Heartbeat) Timing
Table 39. 10BASE-T SQE (Heartbeat) Timing Parameters
Parameter
Sym
Min
Typ
1
Max
Units
Test Conditions
COL (SQE) Delay after TX_EN off
t9A
0.65
1.0
1.6
μ
s
COL (SQE) Pulse duration
t9B
.5
1.0
1.5
μ
s
1. Typical values are at 25
°
C and are for design aid only; not guaranteed and not subject to production testing.
Figure 31. 10BASE-T Jab and Unjab Timing
Table 40. 10BASE-T Jab and Unjab Timing Parameters
Parameter
Sym
Min
Typ
1
Max
Units
Test Conditions
Maximum Transmit time
t10A
20
96 - 128
2
150
ms
Unjab time
t10B
250
525
750
ms
1. Typical values are at 25
°
C and are for design aid only; not guaranteed and not subject to production testing.
2. Typical transmit time may be either of these values depending on internal 32 ms clock synchronization.
TX_CLK
TX_EN
t
9A
t
9B
COL
TXD
COL
t
10A
t
10B
TX_EN
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