LTC1321 LINER [Linear Technology], LTC1321 Datasheet - Page 10

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

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