18

LTC1321/LTC1322/LTC1335

S

APPLICATI

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

Using two LTC1321/LTC1335 as level translators, the

EIA562/RS232 interface distance can be extended to 4000

feet with twisted wires (Figure 23).

RS422

EIA562/RS232*

1321/22/35 F22

100

Ω

10

8

7

17

22

21

20

15

6

TX OUT

TX OUT

RX IN

RX IN

5V

2

3

4

5

LTC1322/LTC1335

* RS232 LEVELS ARE SUPPORTED ON LTC1322.

Figure 22. Typical EIA562/RS232 to RS422 Level Translator

RS422

EIA562/RS232*

1321/22/35 F23

100

Ω

100

Ω

10

8

7

17

22

21

20

15

6

TX OUT

RX IN

5V

2

3

4

5

LTC1322/LTC1335

EIA562/RS232*

20

8

10

15

5V

7

17

22

21

6

2

3

4

5

RX IN

TX OUT

* RS232 LEVELS ARE SUPPORTED ON LTC1322.

LTC1322/LTC1335

Figure 23. Typical Cable Extension for EIA562/RS232 Interface