LTC1321 LINER [Linear Technology], LTC1321 Datasheet - Page 18

• Manufacturer Part Number: LTC1321
• Description: RS232/EIA562/RS485 Transceivers
• Manufacturer: LINER [Linear Technology]

LTC1321/LTC1322/LTC1335
18
TYPICAL
The LTC1322/LTC1335 can be used to translate EIA562 to
RS422 interface level or vice versa as shown in Figure 22.
One port is configured as EIA562 transceiver and the other
as RS485 transceiver. The LTC1322 can also support
RS232 to RS422 level translation if V
and 10V, and V
EIA562/RS232*
A
TX OUT
EE
RX IN
PPLICATI
is between – 6.5V and – 10V.
10
8
LTC1322/LTC1335
7
EIA562/RS232*
Figure 23. Typical Cable Extension for EIA562/RS232 Interface
17 22
O
15
Figure 22. Typical EIA562/RS232 to RS422 Level Translator
TX OUT
RX IN
U
20
S
DD
21
* RS232 LEVELS ARE SUPPORTED ON LTC1322.
5V
10
6
8
is between 6.5V
4
5
2
3
LTC1322/LTC1335
7
100
17 22
15
* RS232 LEVELS ARE SUPPORTED ON LTC1322.
20
RS422
21
5V
6
4
5
2
3
Using two LTC1321/LTC1335 as level translators, the
EIA562/RS232 interface distance can be extended to 4000
feet with twisted wires (Figure 23).
100
100
2
3
4
5
5V
6
LTC1322/LTC1335
21
1321/22/35 F22
RS422
TX OUT
RX IN
22
20
17
15
7
10
8
EIA562/RS232*
TX OUT
RX IN
1321/22/35 F23