參數(shù)資料
型號(hào)： LXT9863HC
英文描述： LAN HUB CONTROLLER
中文描述： 局域網(wǎng)集線器控制器
文件頁數(shù)： 75/96頁
文件大?。?/td> 1309K
代理商： LXT9863HC
LXT980/980A Dual-Speed, 5-Port Fast Ethernet Repeater
Datasheet
75
Figure 38. 10 Mbps IRB Receive Timing
Table 45. 10 Mbps IRB Receive Timing Parameters
1
Parameter
Symbol
t
13A
t
13B
Min
Typ
2
Max
Units
4
Test Conditions
TPIP/N to IR10ENA Low
3
5.1
7
BT
–
IR10CLK rising edge to
IR10DAT rising edge.
25
-
55
ns
330
pull-up, 150 pF load on IR10DAT.
1 k
pull-up, 150 pF load on IRCLK.
All measurements at 2.5V.
IR10CLK rising edge to
IR10DAT falling edge.
t
13C
5
-
25
ns
1. This table contains propagation delays from the TP ports to the IRB for normal repeater operation. All values in this table are
output timings.
2. Typical values are at 25
°
C and are for design aid only; not guaranteed and not subject to production testing.
3. There is a delay of approximately 13 to 16 bit times between the assertion of IR10ENA and the assertion of IR10CLK and
IR10DAT. This delay does not affect repeater operation because downstream devices begin generating preamble as soon as
IR10ENA is asserted.
4. Bit Time (BT) is the duration of one bit as transferred to/from the MAC and is the reciprocal of bit rate. BT for 10BASE-T =
10
s or 100 ns.
TPIP/N
IR10ENA
IR10DAT
t
13A
t
13B
IR10CLK
t
13C
See Table 45, Note 3
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