Datasheet

10
LTC1344
TYPICAL APPLICATIONS N
U
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
LL A
TXD A
TXD B
SCTE A
SCTE B
TM A
RXD A
RXD B
RXC A
RXC B
RXC A
RXC B
RXD A
RXD B
TM A
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
18
DTE DCE
20 22 23 24 1
M0M1M2
DCE/
DTE
13
121138
C6
100pF
C7
100pF
19171815161097645
2
44
C2
1µF
C4
3.3µF
C10
1µF
C13
3.3µF
C5
1µF
C1
1µF
43
42
41
14
V
EE
V
CC
V
CC
5V
2
14
24
11
15
12
17
9
3
16
25
7
1
4
19
20
23
8
10
6
22
5
13
21
1344 TA02
DB-25 CONNECTOR
LTC1344
C8
100pF
21
R1
C3
1µF
GND
LB
V
CC
V
CC
V
CC
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
1µF
C9
1µF
43
42
41
C11
1µF
GND
LB
EC
R1
DTE_LL/DCE_TM
DTE_TXD/DCE_RXD
DTE_SCT/DEC_RXC
DTE_TXC/DCE_TXC
DTE_RXC/DCE_SCTE
DTE_RXD/DCE_TXD
DTE_TM/DCE_LL
DTE_RL/DCE_RL
DTE_RTS/DCE_CTS
DTE_DTR/DCE_DSR
DTE_DCD/DCE_DCD
DTE_DSR/DCE_DTR
DTE_CTS/DCE_RTS
LB
LATCH
DCE/DTE
M2
M1
M0
SGND
SHIELD
RL A
CTS A
CTS B
DSR A
DSR B
RL A
CHARGE
PUMP
CHARGE
PUMP
D1
D2
D3
D4
D1
D2
D3
D4
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
LL A
TXC A
TXC B
24
LATCH
+
+
Controller Selectable Multiprotocol DTE Port with DB-25 Connector