參數(shù)資料
型號: 9883
廠商: Intel Corp.
英文描述: Advanced 10/100 Umnmanaged Repeater
中文描述: 高級10/100 Umnmanaged直放站
文件頁數(shù): 54/56頁
文件大?。?/td> 719K
代理商: 9883
LXT9883/9863
Advanced 10/100 Unmanaged Repeater
54
Datasheet
Document #: 249115
Revision #: 003
Rev. Date: 08/07/01
Figure 24. 10 Mbps TP-to-IRB Timing
Table 33. 10 Mbps TP-to-IRB Timing Parameters
1
Parameter
2
Symbol
t
13A
t
13B
Min
Typ
3
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, 150pF load on IR10DAT.
1 k
pull-up, 150pF load on IRCLK.
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. 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.
3. Typical values are at 25
°
C and are for design aid only; not guaranteed and not subject to production testing.
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 100ns.
TPIP/N
IR10ENA
IR10DAT
t
13A
t
13B
IR10CLK
t
13C
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