Datasheet

23
LTC1343
APPLICATIONS INFORMATION
WUU
U
Figure 35. Controller-Selectable Multiprotocol DTE Port with RI and 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
LL A (141)
TXD A (103)
TXD B
SCTE A (113)
SCTE B
RXC A (115)
RXC B
RXD A (104)
RXD B
RTS A (105)
RTS B
DTR A (108)
DTR B
DCD A (109)
DCD B
DSR A (107)
DSR B/RI A (125)
CTS A (106)
CTS B
TM A (142)
18
20 22 23 24 1
M0M1M2
DCE/
DTE
13
121138
C6
100pF
C7
100pF
1917181516
10
97645
2
44
C2
1µF
C4
3.3µF
C10
1µF
C13
3.3µF
C5
1µF
C1
1µF
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
6
22
8
10
5
13
21
RL A (140)
1343 F35
DB-25 MALE
CONNECTOR
LTC1344
C8
100pF
R1
C3
1µF
GND
LB
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
19
18
17
12
13
14
15
16
40
23
20
22
11
25
CTRL
LATCH
INVERT
423 SET
M2
M1
M0
R2
R3
R4
R2
100k
44
C12
1µF
C9
1µF
43
42
41
C11
1µF
GND
LB
EC
R1
LL
TXD
SCTE
TXC
RXC
RXD
TM
RL
RTS
DTR
DCD
DSR
CTS
RI
LATCH
M2
M1
M0
SGND (102)
SHIELD (101)
CHARGE
PUMP
CHARGE
PUMP
D1
D2
D3
D4
D1
D2
D3
D4
TXC A (114)
TXC B
LB
24
V
CC
DCE
21
+
+
+
+
+
+
+
+
+
+
LATCHLATCH
21