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LAN8740 датащи(PDF) 49 Page - Microchip Technology

номер детали LAN8740
подробное описание детали  Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR짰 Technology
PDF  136 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN8740 датащи(HTML) 49 Page - Microchip Technology

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2013-2015 Microchip Technology Inc.
DS00001987A-page 49
LAN8740A/LAN8740Ai
The typical cable length measurement margin of error for Open and Shorted cases is dependent on the selected cable
type and the distance of the open/short from the device. Table 3-10 and Table 3-11 detail the typical measurement error
for Open and Shorted cases, respectively.
TABLE 3-10:
TYPICAL MEASUREMENT ERROR FOR OPEN CABLE (+/- METERS)
Physical Distance to
Fault
Selected Propagation Constant
POPEN = Unknown
POPEN = CAT 6
POPEN = CAT 5E
POPEN = CAT 5
CAT 6 Cable,
0-100 m
96
CAT 5E Cable,
0-100 m
5
5
CAT 5 Cable,
0-100 m
13
3
CAT 6 Cable,
101-160 m
14
6
CAT 5E Cable,
101-160 m
8
6
CAT 5 Cable,
101-160 m
20
6
TABLE 3-11:
TYPICAL MEASUREMENT ERROR FOR SHORTED CABLE (+/- METERS)
Physical Distance to
Fault
Selected Propagation Constant
PSHORT = Unknown
PSHORT =
CAT 6
PSHORT =
CAT 5E
PSHORT =
CAT 5
CAT 6 Cable,
0-100 m
85
CAT 5E Cable,
0-100 m
5
5
CAT 5 Cable,
0-100 m
11
2
CAT 6 Cable,
101-160 m
14
6
CAT 5E Cable,
101-160 m
7
6
CAT 5 Cable,
101-160 m
11
3



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