Datasheet

17
LTC1321/LTC1322/LTC1335
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
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.
Figure 20. Typical Connection for RS422 Interface
1/2 LTC1322/LTC1335
TX OUT
RX IN
1321/22/35 F21
100Ω
2
3
4
6
21
2022
5
5V
Figure 21. Typical Cable Repeater for RS422 Interface
1/2 LTC1322/LTC1335
1/2 LTC1322/LTC1335
1/2 LTC1322/LTC1335
1321/22/35 F20
100Ω
20
21
6
22
7
15
16
17
5V
5V
RX OUT
RX OUT
RX OUT
DR ENABLE
DR ENABLE
DR IN
DR IN
3
2
6
5V
2
3
4
5
9
8
11
22
10
100Ω