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_TXD/DCE_RXD
DTE_SCTE/DEC_RXC
DTE_TXC/DCE_TXC
DTE_RXC/DCE_SCTE
DTE_RXD/DCE_TXD
DTE_RTS/DCE_CTS
DTE_DTR/DCE_DSR
DTE_DCD/DCE_DCD
DTE_DSR/DCE_DTR
DTE_CTS/ DCE_RTS
LB
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
D1
39
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
26
R4
20
21
CTRL
22
LATCH
11 INVERT
25
423 SET
DCE
19
M2
18
VCC
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
25 INVERT
423 SET
26
21
DCE
19
M2
18
M1
17
M0
40
23 GND
LB
24
EC
C10
1µF
C13
3.3µF
VCC
3
8
11 12 13
LTC1344
21
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 CONNECTOR
DTE
2 TXD A
14 TXD B
24 SCTE A
11 SCTE B
DCE
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
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
7
SGND
1
SHIELD
VCC VCC
VCC
R3
R4
R5
10k 10k 10k
25 DCE/DTE
21 M1
18
M0
4 RTS A
19 RTS B
20 DTR A
23 DTR B
CTS A
CTS B
DSR A
DSR B
8 DCD A
10 DCD B
6
22 DSR A
DSR B
5 CTS A
13 CTS B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
1343 F37
CABLE WIRING FOR MODE SELECTION
MODE
PIN 18 PIN 21
V.35
PIN 7
PIN 7
EIA-530, RS449, NC
PIN 7
V.36, X.21
RS232
PIN 7
NC
CABLE WIRING FOR DTE/DCE
SELECTION
MODE
PIN 25
DTE
PIN 7
DCE
NC
Figure 37. Cable-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector
25
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