LTC1343 Linear Technology, LTC1343 Datasheet - Page 21

• Manufacturer Part Number: LTC1343
• Description: Software-Selectable Multiprotocol Transceiver
• Manufacturer: Linear Technology

APPLICATIONS
DTE_SCTE/DEC_RXC
DTE_RXC/DCE_SCTE
DTE_DCD/DCE_DCD
DTE_DTR/DCE_DSR
DTE_DSR/DCE_DTR
DTE_TXD/DCE_RXD
DTE_RXD/DCE_TXD
DTE_RTS/DCE_CTS
DTE_CTS/DCE_RTS
DTE_TXC/DCE_TXC
DTE_LL/DCE_TM
DTE_TM/DCE_LL
DTE_RL/DCE_RL
DCE/DTE
LATCH
M2
M1
M0
LB
U
Figure 33. Controller-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector
+
V
+
CC
INFORMATION
U
C3
1 F
C11
1 F
+
V
+
V
CC
5V
CC
1 F
1 F
100k
100k
C9
C1
C12
1 F
C5
1 F
R1
R2
+
+
10
12
13
16
40
23
10
12
13
14
15
16
20
22
11
25
40
23
14
15
20
22
11
25
W
1
2
4
3
8
5
1
2
4
3
8
5
6
7
6
7
9
9
CTRL
LATCH
INVERT
423 SET
GND
LB
CTRL
LATCH
INVERT
423 SET
GND
LB
LTC1343
LTC1343
CHARGE
CHARGE
PUMP
D1
D2
D3
D4
PUMP
D1
D2
D3
D4
R2
R4
R2
R4
R1
R3
R1
R3
DCE
DCE
M2
M1
M0
M2
M1
M0
EC
EC
U
32
24
32
44
43
42
41
39
38
37
36
35
34
33
31
30
29
28
27
26
21
19
18
17
44
43
42
41
39
38
37
36
35
34
33
31
30
29
28
27
26
21
19
18
17
24
+
+
V
+
+
CC
C2
1 F
C4
3.3 F
C10
1 F
C13
3.3 F
14
2
V
V
CC
EE
100pF
C6
3
5
4
100pF
C7
8
6
7
100pF
C8
11
9
10
12
16
13
15
18
17
19
20 22 23 24 1
DCE/
DTE
LTC1344
M2
M1
LATCH
M0
21
17
19
20
23
14
24
11
15
12
16
25
10
22
13
18
21
2
9
3
7
1
4
8
6
5
LATCH
DB-25 CONNECTOR
LTC1343
TXC A
TXC B
RL A
LL A
TXD A
TXD B
SCTE A
SCTE B
RXC A
RXC B
RXD A
RXD B
TM A
SGND
SHIELD
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
DTE
TM A
RXD A
RXD B
RXC A
RXC B
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
LL A
RL A
CTS A
CTS B
DSR A
DSR B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
1343 F33
DCE
21