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
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
LATCH
LB
DCE/DTE
M2
M1
M0
VCC
5V
+
1
C3
1µF C1 +
2
1µF
4
3
+
C5
8
1µF
5
6
7
9
10
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
20
22 CTRL
LATCH
11 INVERT
25
423 SET
26
21
DCE
19
M2
18
M1
17
M0
R1
100k 40
23 GND
LB
24
EC
VCC
+
C11
1µF C9 +
1µF
VCC +
C12
1µF
VCC
R2
100k
1
44
2
43
4
42
CHARGE
3
PUMP
8
41
LTC1343
5
D1
39
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
CTRL
22
11 LATCH
INVERT
25
423 SET
26
21
DCE
19
M2
18
M1
17
M0
40
GND
23
LB
EC 24
C10
1µF
C13
3.3µF
VCC
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
µDB-26 CONNECTOR
18
DTE
LL A
2 TXD A
14 TXD B
24 SCTE A
11 SCTE B
DCE
TM A
RXD A
RXD B
RXC A
RXC B
15 TXC A
12 TXC B
17 RXC A
9 RXC B
3 RXD A
16 RXD B
25 TM A
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
LL A
7
SGND
1
SHIELD
21
RL A
4 RTS A
19 RTS B
20 DTR A
23 DTR B
RI A
CTS A
CTS B
DSR A
DSR B
8 DCD A
10
6
DCD B
22 DSR A
DSR B
5 CTS A
13 CTS B
26 RI A
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
RL A
1343 F38
Figure 38. Controller-Selectable Multiprotocol DTE/DCE Port with DB-26 Connector
26
Share Link: 
