Datasheet

22
LTC1343
Figure 34. Controller-Selectable Multiprotocol DTE/DCE Port with DB-25
APPLICATIONS INFORMATION
WUU
U
LTC1343
12
13
10
9
21
14
15
16
5
6
7
26
R2
R3
R4
TM A (142)
RXD A (104)
RXD B
RXC A (115)
RXC B
TXC A (114)
TXC B
SCTE A (113)
SCTE B
TXD A (103)
TXD B
LL A (141)
CTS A (106)
CTS B
DSR A (107)
DSR B
DCD A (109)
DCD B
DTR A (108)
DTR B
RTS A (105)
RTS B
RL A (140)
25
20 22
13
12
19171815161097645
DCE
39
38
37
36
35
34
33
28
29
30
32
31
27
3
16
17
9
15
12
24
11
2
14
18
7
5
13
6
22
8
10
20
23
4
19
21
1343 F34
DB-25 CONNECTOR
LTC1344
DCE/
DTE
DCE/DTE
R1
SGND (102)
D1
D2
D3
D4
1
SHIELD (101)
LTC1343
12
13
10
9
21
14
15
16
5
CTS
DSR
DCD
DTR
RTS
RL
TM
RXD
RXC
TXC
SCTE
TXD
LL
6
7
V
CC
V
CC
26
R2
R3
R4
DCE
39
38
37
36
35
34
33
28
29
30
32
31
27
R1
D1
D2
D3
D4
LTC1343
12
13
10
9
21
14
15
16
5
6
7
26
R2
R3
R4
DCE
39
38
37
36
35
34
33
28
29
30
32
31
27
R1
D1
D2
D3
D4
LTC1343
12
13
10
9
21
14
15
16
5
6
7
26
R2
R3
R4
DCE
39
38
37
36
35
34
33
28
29
30
32
31
27
R1
D1
D2
D3
D4
1138
C6
100pF
C7
100pF
C8
100pF