LTC1334 LINER [Linear Technology], LTC1334 Datasheet - Page 8

• Manufacturer Part Number: LTC1334
• Description: Single 5V RS232/RS485 Multiprotocol Transceiver
• Manufacturer: LINER [Linear Technology]

LTC1334
BLOCK DIAGRA
V
SEL1 = 0V
SEL2 = 0V
8
SEL1 = 0V
SEL2 = 0V
DD
C1
C1
V
DD
GND
GND
Y1
Z1
Z2
Y2
A1
B1
Y1
Z1
Z2
Y2
B2
A2
10
11
14
10
11
12
13
14
1
2
3
6
7
8
9
1
2
3
4
5
6
7
8
9
PORT 1 = RS232 MODE
PORT 2 = RS232 MODE
PORT 1 = RS232 MODE
PORT 2 = RS232 MODE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
R
R
D
D
ON
D
D
R
R
V
R
R
D
D
LB
ON
D
D
R
R
V
LB
V
CC
B1
A1
Z1
Y1
Y2
Z2
A2
B2
CC
B1
A1
Z1
Y1
Y2
Z2
A2
B2
EE
W
EE
C2
C2
SEL1 = 5V
SEL2 = 0V
V
SM
SEL1 = 5V
SEL2 = 0V
DD
C1
C1
V
DD
GND
GND
Y1
Y2
Z1
Z2
A1
B1
Y1
Y2
B2
A2
Z1
Z2
10
11
14
10
11
12
13
14
1
2
3
6
7
8
9
1
2
3
4
5
6
7
8
9
PORT 1 = RS485 MODE
PORT 2 = RS232 MODE
Interface Configuration with Loopback Disabled
PORT 1 = RS485 MODE
PORT 2 = RS232 MODE
Interface Configuration with Loopback Enabled
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
R
R
DE1
D
ON
D
D
R
R
V
R
R
DE1
D
LB
ON
LB
D
D
R
R
V
CC
V
B1
A1
Y1
Y2
Z2
A2
B2
CC
B1
A1
Y1
Y2
Z2
A2
B2
EE
EE
C2
C2
SEL1 = 0V
SEL2 = 5V
V
SEL1 = 0V
SEL2 = 5V
DD
C1
C1
V
DD
GND
GND
Y1
Y2
Z1
Z2
A1
B1
Y1
Z1
Y2
B2
A2
Z2
10
11
14
10
11
12
13
14
1
2
3
6
7
8
9
1
2
3
4
5
6
7
8
9
PORT 1 = RS232 MODE
PORT 2 = RS485 MODE
PORT 1 = RS232 MODE
PORT 2 = RS485 MODE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
R
R
D
D
ON
D
DE2
R
R
V
R
R
D
D
LB
ON
D
DE2
R
R
LB
V
CC
V
B1
A1
Z1
Y1
Y2
A2
B2
CC
EE
B1
A1
Z1
Y1
Y2
A2
B2
EE
C2
C2
SEL1 = 5V
SEL2 = 5V
V
SEL1 = 5V
SEL2 = 5V
DD
C1
C1
V
DD
GND
GND
Y1
Y2
Z1
Z2
A1
B1
Y1
Y2
B2
A2
Z1
Z2
10
11
14
10
11
12
13
14
1
2
3
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
LTC1334 • BD02
LTC1334 • BD01
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ON
V
R
R
DE1
D
D
DE2
R
R
V
R
R
DE1
D
LB
ON
D
DE2
R
R
LB
V
CC
V
B1
A1
Y1
Y2
A2
B2
CC
B1
A1
Y1
Y2
A2
B2
EE
EE
C2
C2