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LTC1343 Datasheet(PDF) 25 Page - Linear Technology

Part # LTC1343
Description  Software-Selectable Multiprotocol Transceiver
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1343 Datasheet(HTML) 25 Page - Linear Technology

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25
LTC1343
APPLICATIONS INFORMATION
Figure 37. Cable-Selectable Multiprotocol DTE/DCE Port with 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
TXD A
TXD B
SCTE A
SCTE B
RXD A
RXD B
RXC A
RXC B
RXC A
RXC B
RXD A
RXD B
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
DTE
DCE
20 22
23 24 1
M0
M1
M2
DCE/
DTE
13
12
11
38
C6
100pF
C7
100pF
19
17
18
15
16
10
9
7
6
4
5
2
44
C2
1
µF
C4
3.3
µF
C10
1
µF
C13
3.3
µF
C5
1
µF
C1
1
µF
43
42
41
14
VEE
VCC
VCC
5V
2
14
24
11
15
12
17
9
3
16
7
1
4
19
20
23
8
10
6
22
5
13
25
21
18
1343 F37
DB-25 CONNECTOR
LTC1344
C8
100pF
R1
C3
1
µF
GND
LB
VCC
VCC
VCC
VCC
VCC
VCC
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
CTRL
LATCH
INVERT
423 SET
DCE
M2
M1
M0
R2
R3
R4
R2
100k
44
C12
1
µF
C9
1
µF
43
42
41
C11
1
µF
GND
LB
EC
R1
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
SGND
SHIELD
CTS A
CTS B
DSR A
DSR B
CHARGE
PUMP
CHARGE
PUMP
D1
D2
D3
D4
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
TXC A
TXC B
R5
10k
R4
10k
DCE/DTE
M1
M0
VCC
VCC
D1
D2
D3
D4
24
R3
10k
VCC
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
+
+
+
+
+
+
+
+
LATCH
21



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