LTC1321 LINER [Linear Technology], LTC1321 Datasheet - Page 16

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

LTC1321/LTC1322/LTC1335
A typical EIA562/RS232 interface application is shown in
Figure 17 with LTC1322. A typical EIA562 interface appli-
cation with LTC1335 is shown in Figure 18.
A typical connection for RS485 transceiver is shown in
Figure 19. A twisted pair of wires connects up to 32 drivers
16
TYPICAL
Figure 17. Typical Connection for EIA562/RS232 Interface
RX OUT
RX OUT
DR IN
DR IN
OV
17
16
15
14
7
1/2 LTC1322
A
DR ENABLE
PPLICATI
RX OUT
DR IN
5V
8
9
10
11
1/2 LTC1322/LTC1335
INTERFACE
22
21
20
6
EIA562/
RS232
LINES
O
U
3
2
5
4
2
3
4
5
1/2 LTC1322
Figure 19. Typical Connection for RS485 Interface
S
120
22
23
20
21
6
1321/22/35 F17
RX OUT
RX OUT
DR IN
DR IN
0V
DR IN
5 4
DR ENABLE
20
21
and receivers for half duplex multi-point data transmis-
sion. The wires must be terminated at both ends with
resistors equal to the wire’s characteristic impedance,
generally 120 . An optional shield around the twisted pair
helps to reduce unwanted noise and should be connected
to ground at one end.
RX OUT
3 2
22 6
5V
RX OUT
RX OUT
DR IN
DR IN
Figure 18. Typical Connection for EIA562 Interface
1/2 LTC1322/LTC1335
OV
17
16
15
14
7
120
1/2 LTC1335
OE = 0V
1
1/2 LTC1322/LTC1335
8
9
10
11
11
10
9
8
INTERFACE
EIA562
LINES
15
16
17
7
3
2
5
4
1321/22/35 F19
1/2 LTC1335
RX OUT
DR ENABLE
5V
DR IN
OE = 0V
1
22
23
20
21
6
1321/22/35 F18
RX OUT
RX OUT
DR IN
DR IN
0V