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LTC1343IGW#PBF
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P28
25
L
T
C1
343
APPLICA
TIO
N
S I
N
FOR
M
A
TIO
N
WU
U
U
Figure 37. Cable-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector
LTC1343
1
2
4
3
8
5
6
7
9
10
39
38
37
36
35
34
33
32
31
30
29
28
27
26
21
19
18
17
12
13
14
15
16
40
23
20
22
11
25
CTRL
LATCH
INVERT
423 SET
DCE
M2
M1
M0
R2
R3
R4
R1
100k
TXD A
TXD B
SCTE A
SCTE B
RXD A
RXD B
RXC A
RXC B
RXC A
RXC B
RXD A
RXD B
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
DTE
DCE
20
22
23
24
1
M0
M1
M2
DCE/
DTE
13
12
11
38
C6
100pF
C7
100pF
19
17
18
15
16
10
9
7
6
4
5
2
44
C2
1
µ
F
C4
3.3
µ
F
C10
1
µ
F
C13
3.3
µ
F
C5
1
µ
F
C1
1
µ
F
43
42
41
14
V
EE
V
CC
V
CC
5V
2
14
24
11
15
12
17
9
3
16
7
1
4
19
20
23
8
10
6
22
5
13
25
21
18
1343 F37
DB-25 CONNECTOR
LTC1344
C8
100pF
R1
C3
1
µ
F
GND
LB
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
EC
24
LTC1343
1
2
4
3
8
5
6
7
9
10
39
38
37
36
35
34
33
32
31
30
29
28
27
26
21
19
18
17
12
13
14
15
16
40
23
20
22
11
25
CTRL
LATCH
INVERT
423 SET
DCE
M2
M1
M0
R2
R3
R4
R2
100k
44
C12
1
µ
F
C9
1
µ
F
43
42
41
C11
1
µ
F
GND
LB
EC
R1
DTE_TXD/
DCE_RXD
DTE_SCTE
/
DEC_RXC
DTE_TXC
/
DCE_TXC
DTE_RXC
/
DCE_SCTE
DTE_RXD
/
DCE_TXD
DTE_RTS
/
DCE_CTS
DTE_DTR
/
DCE_DSR
DTE_DCD
/
DCE_DCD
DTE_DSR
/
DCE_DTR
DTE_CTS
/ DCE_RTS
LB
SGND
SHIELD
CTS A
CTS B
DSR A
DSR B
CHARGE
PUMP
CHARGE
PUMP
D1
D2
D3
D4
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
TXC A
TXC B
R5
10k
R4
10k
DCE/DTE
M1
M0
V
CC
V
CC
D1
D2
D3
D4
24
R3
10k
V
CC
CABLE WIRING FOR MODE SELECTION
MODE
PIN 18
PIN 21
V.35
PIN 7
PIN 7
EIA-530, RS449,
NC
PIN 7
V.36, X.21
RS232
PIN 7
NC
CABLE WIRING FOR DTE/DCE
SELECTION
MODE
PIN 25
DTE
PIN 7
DCE
NC
+
+
+
+
+
+
+
+
+
+
LATCH
21
26
L
T
C1
343
Figure 38. Controller-Selectable Multiprotocol DTE/DCE Port with DB-26 Connector
APPLICA
TIO
N
S I
N
FOR
M
A
TIO
N
WU
U
U
LTC1343
1
2
4
3
8
5
6
7
9
10
39
38
37
36
35
34
33
32
31
30
29
28
27
26
21
19
18
17
12
13
14
15
16
40
23
20
22
11
25
CTRL
LATCH
INVERT
423 SET
DCE
M2
M1
M0
R2
R3
R4
R1
100k
LL A
TXD A
TXD B
SCTE A
SCTE B
TM A
RXD A
RXD B
RXC A
RXC B
RXC A
RXC B
RXD A
RXD B
TM A
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
RI A
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
RL A
18
DTE
DCE
20
22
23
24
1
M0
M1
M2
DCE/
DTE
13
12
11
38
C6
100pF
C7
100pF
19
17
18
15
16
10
9
7
6
4
5
2
44
C2
1
µ
F
C4
3.3
µ
F
C10
1
µ
F
C13
3.3
µ
F
C5
1
µ
F
C1
1
µ
F
43
42
41
14
V
EE
V
CC
V
CC
5V
2
14
24
11
15
12
17
9
3
16
25
7
1
4
19
20
23
8
10
6
22
5
13
26
21
1343 F38
µ
DB-26 CONNECTOR
LTC1344
C8
100pF
R1
C3
1
µ
F
GND
LB
V
CC
V
CC
V
CC
V
CC
EC
24
LTC1343
1
2
4
3
8
5
6
7
9
10
39
38
37
36
35
34
33
32
31
30
29
28
27
26
21
19
18
17
12
13
14
15
16
40
23
20
22
11
25
CTRL
LATCH
INVERT
423 SET
DCE
M2
M1
M0
R2
R3
R4
R2
100k
44
C12
1
µ
F
C9
1
µ
F
43
42
41
C11
1
µ
F
GND
LB
EC
R1
DTE_LL
/
DCE_TM
DTE_TXD/
DCE_RXD
DTE_SCTE
/
DEC_RXC
DTE_TXC
/
DCE_TXC
DTE_RXC
/
DCE_SCTE
DTE_RXD
/
DCE_TXD
DTE_TM
/
DCE_LL
DTE_RL
/
DCE_RI
DTE_RTS
/
DCE_CTS
DTE_DTR
/
DCE_DSR
DTE_DCD
/
DCE_DCD
DTE_DSR
/
DCE_DTR
DTE_CTS
/
DCE_RTS
DTE_RI
/
DCE_RL
LB
LATCH
DCE/DTE
M2
M1
M0
SGND
SHIELD
RL A
CTS A
CTS B
DSR A
DSR B
RI A
CHARGE
PUMP
CHARGE
PUMP
D1
D2
D3
D4
D1
D2
D3
D4
TXC A
TXC B
TXC A
TXC B
24
SCTE A
SCTE B
TXD A
TXD B
LL A
+
+
+
+
+
+
+
+
+
+
LATCH
LATCH
21
27
L
T
C1
343
Figure 39. Cable-Selectable Multiprotocol DTE Port with DB-26 Connector
APPLICA
TIO
N
S I
N
FOR
M
A
TIO
N
WU
U
U
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
LTC1343
1
2
4
3
8
5
6
7
9
10
39
38
37
36
35
34
33
32
31
30
29
28
27
26
21
19
18
17
12
13
14
15
16
40
23
20
22
11
25
CTRL
LATCH
INVERT
423 SET
DCE
M2
M1
M0
R2
R3
R4
R1
100k
TXD A
TXD B
SCTE A
SCTE B
RXD A
RXD B
RXC A
RXC B
RXC A
RXC B
RXD A
RXD B
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
LL B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
LL B
DTE
DCE
20
22
23
24
1
M0
M1
M2
DCE/
DTE
13
12
11
38
C6
100pF
C7
100pF
19
17
18
15
16
10
9
7
6
4
5
2
44
C2
1
µ
F
C4
3.3
µ
F
C10
1
µ
F
C13
3.3
µ
F
C5
1
µ
F
C1
1
µ
F
43
42
41
14
V
EE
V
CC
V
CC
5V
2
14
24
11
15
12
17
9
3
16
7
1
4
19
20
23
8
10
6
22
5
13
26
25
21
18
1343 F39
µ
DB-26 CONNECTOR
LTC1344
C8
100pF
R1
C3
1
µ
F
GND
LB
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
EC
24
LTC1343
1
2
4
3
8
5
6
7
9
10
39
38
37
36
35
34
33
32
31
30
29
28
27
26
21
19
18
17
12
13
14
15
16
40
23
20
22
11
25
CTRL
LATCH
INVERT
423 SET
DCE
M2
M1
M0
R2
R3
R4
R2
100k
44
C12
1
µ
F
C9
1
µ
F
43
42
41
C11
1
µ
F
GND
LB
EC
R1
DTE_TXD
/
DCE_RXD
DTE_SCTE
/
DEC_RXC
DTE_TXC
/
DCE_TXC
DTE_RXC
/
DCE_SCTE
DTE_RXD
/
DCE_TXD
DTE_RTS/
DCE_CTS
DTE_LL
/
DCE_LL
DTE_DTR
/
DCE_DSR
DTE_DCD
/
DCE_DCD
DTE_DSR
/
DCE_DTR
DTE_CTS
/
DCE_RTS
LB
SGND
SHIELD
CTS A
CTS B
DSR A
DSR B
CHARGE
PUMP
CHARGE
PUMP
D1
D2
D3
D4
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
TXC A
TXC B
R5
10k
R4
10k
DCE/DTE
M1
M0
V
CC
V
CC
D1
D2
D3
D4
24
R3
10k
V
CC
CABLE WIRING FOR MODE SELECTION
MODE
PIN 18
PIN 21
V.35
PIN 7
PIN 7
EIA-530, RS449,
NC
PIN 7
V.36, X.21
RS232
PIN 7
NC
CABLE WIRING FOR DTE/DCE
SELECTION
MODE
PIN 25
DTE
PIN 7
DCE
NC
+
+
+
+
+
+
+
+
+
+
LATCH
21
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P28
LTC1343IGW#PBF
Mfr. #:
Buy LTC1343IGW#PBF
Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC Sftwr-Sel Multiprotocol Tran
Lifecycle:
New from this manufacturer.
Delivery:
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Payment:
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