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LTC1687 Datasheet(PDF) 10 Page - Linear Technology |
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LTC1687 Datasheet(HTML) 10 Page - Linear Technology |
10 / 12 page 10 LTC1686/LTC1687 APPLICATIONS INFORMATION 1686/87 F11a DRIVER INPUT RECEIVER OUTPUT 10ns/DIV 2V/DIV 2V/DIV Figure 11a. 100 Feet of Category 5 UTP: 50Mbps DC and AC attenuation over long distances. Figure 14a shows a 1 µs pulse propagated down 4000 feet of category 5 UTP. Notice the significant attenuation at the receiver input and the clean pulse at the receiver output. The DC attenuation is due to the parasitic resistance of the cable. Figure 14b shows a 1Mbps square wave over the same 4000 feet of cable. 1686/87 F12 DRIVER INPUT RECEIVER OUTPUT 100ns/DIV 2V/DIV 2V/DIV Figure 12. 1000 Feet of Category 5 UTP: 4Mbps 1686/87 F13 DRIVER INPUT DIFFERENTIAL RECEIVER INPUT RECEIVER OUTPUT 20ns/DIV 2V/DIV 2V/DIV 2V/DIV 1685 F11b RECEIVER INPUT DRIVER INPUT RECEIVER OUTPUT 20ns/DIV 2V/DIV 5V/DIV 2V/DIV CABLE DELAY Figure 11b. 100 Feet of Category 5 UTP: 20ns Pulse Figure 13. 100 Feet of Telephone Grade UTP: 30Mbps 1685 F14a RECEIVER INPUT DRIVER INPUT RECEIVER OUTPUT 1 µs/DIV 1V/DIV 5V/DIV 2V/DIV CABLE DELAY Figure 14a. 4000 Feet of Category 5 UTP 1 µs Pulse 1685 F14b DRIVER INPUT RECEIVER OUTPUT 1 µs/DIV 5V/DIV 2V/DIV Figure 14b. 4000 Feet of Category 5 UTP 1Mbps Square Wave 1.6Mbps Over 8000 Feet (1.5 Miles) Category 5 UTP Using Repeaters The LTC1686/LTC1687 can be used as repeaters to extend the effective length of a high speed twisted-pair line. Figure 15a shows a three repeater configuration using 2000 feet segments of category 5 UTP. Figure 15b shows the |
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Similar Description - LTC1687 |
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