LTC1343 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1343' PDF : 28 Pages View PDF
LTC1343
APPLICATIONS INFORMATION
C6 C7 C8
100pF 100pF 100pF
TM
RXD
RXC
TXC
SCTE
TXD
LL
RI
CTS
DSR
DCD
DTR
CTX
RL
LATCH
LB
M2
M1
M0
VCC
5V
+ C3
1µF
+
C1
1
2
1µF
4
3
+
C5
8
1µF
5
6
7
9
10
VCC
12
13
14
15
44
43
42
CHARGE
PUMP
41
LTC1343
39
D1
38
D2
37
36
D3
35
34
D4
33
32
R1
31
30
R2
29
28
R3
27
14
VCC
C2
1µF
2
C4
VEE
3.3µF
16
R4
26
20
22 CTRL
21
DCE
19
VCC
LATCH
11 INVERT
25 423 SET
M2
18
M1
17
M0
R1
100k 40
23 GND
LB
24
EC
VCC
+
C11
1µF
+
C9
1µF
VCC +
C12
1µF
VCC
VCC
R2
100k
1
44
2
43
4
42
CHARGE
3
PUMP
8
41
LTC1343
5
39
D1
38
6
D2
37
36
7
D3
35
34
9
D4
33
10
12
32
13
R1
31
30
14
R2
29
28
15
R3
27
16
R4
20
22 CTRL
LATCH
11
25 INVERT
423 SET
26
21
DCE
M2 19
M1 18
M0 17
40
23 GND
LB
EC 24
C10
1µF
C13
3.3µF
RIEN = RS232
3
8
11 12 13
LTC1344
21
LATCH
LATCH
DCE/
DTE M2 M1 M0
5 4 6 7 9 10 16 15 18 17 19 20 22 23 24 1
VCC
DB-25 FEMA;E
CONNECTOR
25
TM A (142)
3 RXD A (104)
16 RXD B
17
RXC A (115)
9 RXC B
15
TXC A (114)
12
TXC B
24 SCTE A (113)
11 SCTE B
2 TXD A (103)
14 TXD B
18 LL A (141)
7
SGND (102)
1
SHIELD (101)
5 CTS A (106)
13 CTS B
6 DSR A (107)
22 DSR B/RI A (125)
8 DCD A (109)
10 DCD B
20 DTR A (108)
23 DTR B
4 RTS A (105)
19
RTS B
21 RL A (140)
1343 F36
Figure 36. Controller-Selectable Multiprotocol DCE Port with RI and DB-25 Connector
24
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