Datasheet

10
LTC1321/LTC1322/LTC1335
LTC1321 Interface Configuration With Loopback
LTC1322/LTC1335 Interface Configuration Without Loopback
R
A1
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
A2
B2
23
D
Y2
17
14
R
B2
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
D
Y1
5
6
V
CC
ON
DE1
B1
A1
Z1
Y1
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
D
Z2
Y2
Z2
**SEL1
SEL2
24
3
4
2
7
8
9
10
11
22
21
20
LB
18
19
16
GND
V
EE
1212
13
R
A2
15
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
1
*V
DD
/OE
*
R
B1
R
B1
R
A1
V
CC
D
Z1
D
Y1
ON
Z1
A1
B1
D
Y2
D
Z2
Z2
Y2
A2
SEL1
SEL2
23
24
1
4
2
3
6
7
8
9
21
22
19
LB
18
17
GND
V
EE
10
B2
11
15
14
13
R
A2
R
B2
16
Y1
5
20
*V
DD
/OE
*
12
R
B1
R
A1
V
CC
D
Z1
D
Y1
ON
Z1
A1
B1
D
Y2
DE2
Z2
Y2
A2
SEL1
**SEL2
23
24
1
4
2
3
6
7
8
9
21
22
19
LB
18
17
GND
V
EE
10
B2
11
15
14
13
R
A2
R
B2
16
Y1
5
20
*V
DD
/OE
*
12
1322/35 BD01
R
A1
V
CC
DE1
D
Y1
ON
Z1
A1
B1
D
Y2
DE2
Z2
Y2
A2
**SEL2
23
24
1
4
2
3
6
7
8
9
21
22
19
LB
18
17
GND
V
EE
10
B2
11
15
14
13
R
A2
R
B2
16
Y1
5
20
*V
DD
/OE
*
**SEL1
R
B1
FOR LTC1322 ONLY, PIN 1 IS V
DD
, AND OE IS ALWAYS ENABLED.
FOR LTC1335, PIN 1 IS OE, AND V
DD
IS CONNECTED TO V
CC
.
SEL1/SEL2 = V
CC
.

*

**

1321 BD02
R
A1
V
CC
V
DD
D
Y1
ON
Y1
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
D
Y2
Y2
SEL1
SEL2
24
22
1
5
6
7
8
20
19
LB
18
17
GND
V
EE
12
13
R
A2
15
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
D
Y1
6
R
A1
V
CC
V
DD
DE1
ON
Z1
Y1
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
D
Y2
Y2
*SEL1
*SEL1/SEL2 = V
CC
SEL2
24
22
1

5
4
7
8
21
20
LB
18
19
17
GND
V
EE
12
13
R
A2
15
R
A1
V
CC
V
DD
D
Y1
ON
DE2
Y1
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
D
Y2
SEL1
24
22
1
5
6
7
8
9
20
19
LB
18
17
16
12 13
15
Y2
Z2
*SEL2
GND
V
EE
R
A2
DE2
D
Y2
7
8
9
17
16
12
13
15
Y2
Z2
*SEL2
GND
V
EE
R
A2
D
Y1
6
R
A1
V
CC
V
DD
DE1
Z1
Y1
*SEL1
24
22
1

5
4
21
20
LB
19
ON
18
BLOCK DIAGRA SM
W