Datasheet

24
LTC1343
APPLICATIONS INFORMATION
WUU
U
Figure 36. Controller-Selectable Multiprotocol DCE 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
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/RI A (125)
DCD A (109)
DCD B
DTR A (108)
DTR B
RTS A (105)
RTS B
RL A (140)
25
20 22 23 24 1
M0M1M2
V
CC
DCE/
DTE
13
121138
C6
100pF
C7
100pF
19171815161097645
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
3
16
17
9
15
12
24
11
2
14
18
7
1
5
13
8
10
6
22
20
23
4
19
21
1343 F36
DB-25 FEMA;E
CONNECTOR
LTC1344
C8
100pF
R1
C3
1µF
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
DCE
M2
M1
M0
R2
R3
R4
R2
100k
44
C12
1µF
C9
1µF
43
42
41
C11
1µF
GND
LB
EC
CTRL
LATCH
INVERT
423 SET
R1
TM
RXD
RXC
TXC
SCTE
TXD
LL
RI
CTS
DSR
DCD
DTR
CTX
RL
LB
M2
M1
M0
LATCH
SGND (102)
SHIELD (101)
CHARGE
PUMP
CHARGE
PUMP
D1
D2
D3
D4
D1
D2
D3
D4
RIEN = RS232
24
+
+
+
+
+
+
+
+
+
+
LATCHLATCH
21