RS485 Ver la hoja de datos (PDF) - Linear Technology
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RS485 Datasheet PDF : 20 Pages
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LTC1321/LTC1322/LTC1335
TYPICAL APPLICATI S
A typical RS422 connection shown in Figure 20 allows one
driver and ten receivers on a twisted pair of wires termi-
nated with a 100Ω resistor at one end. The ground shield
is optional.
A typical twisted pair line repeater is shown in Figure 21.
As data transmission rate drops with increased cable
length, repeater can be inserted to improve transmission
rate or to transmit beyond 4000 feet limit.
1/2 LTC1322/LTC1335
DR ENABLE
DR IN 20
6
5V
21
4
5
RX OUT 22
2
3
1/2 LTC1322/LTC1335
RX OUT
22
6 5V
32
100Ω
1/2 LTC1322/LTC1335
11
100Ω
10
15
RX OUT
7 5V
9
16 DR ENABLE
17
DR IN
8
1321/22/35 F20
Figure 20. Typical Connection for RS422 Interface
RX IN
5V
2
100Ω
3
22 20
21 6
4
5
1/2 LTC1322/LTC1335
TX OUT
1321/22/35 F21
Figure 21. Typical Cable Repeater for RS422 Interface
17
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