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DP83858VF 데이터시트(PDF) 21 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 DP83858VF
상세설명  100 Mb/s TX/T4 Repeater Interface Controller (100RIC8??
PDF  37 Pages
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
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DP83858VF 데이터시트(HTML) 21 Page - National Semiconductor (TI)

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5.0 DP83858 Applications
5.1 MII Interface Connections
The DP83858 can be interfaced with the DP83840A in the
same fashion as the DP83850 as described in the Applica-
tion Note 1069 "100BASE-TX Unmanaged Repeater
Design Recommendations". Designers should be aware
that there are significant issues involved in the signal tim-
ing, loading and layout of this interface and they should
consult this Application Note and/or their National Semi-
conductor representative prior to attempting a design. Fur-
ther system timing analysis shows that the RXD[3:0],
RX_DV and RX_ER signals should be latched into the
DP83858 from the connected DP83840As. Figure 5 shows
the recommended scheme. This ensures system timing
can be met for hub stacks.
Figure 5. Recommended DP83840A to DP83858 Connections
RXD0
RXD1
RXD2
RXD3
RX_DV
RX_ER
RX_CLK
DP83840A
100PHY
#0
RXD0
RXD1
RXD2
RXD3
RX_DV
RX_ER
RX_CLK
DP83840A
100PHY
#1
RXD0
RXD1
RXD2
RXD3
RX_DV
RX_ER
RX_CLK
DP83840A
100PHY
#7
'ABT541
'ABT541
'ABT541
'ABT174
'F04
DP83858
100RIC8
DQ
RXD0
RXD1
RXD2
RXD3
RX_DV
RX_ER
RX_CLK
T
T
T
T
T
T
T
T
T
T = AC Termination - see AN-1069
/MR
RXE7
RXE0
P = Pull -Downs, 1.2k ohms
P
P
P
P
P
P
P



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