LTC1344 데이터 시트보기 (PDF) - Linear Technology
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LTC1344 Datasheet PDF : 12 Pages
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LTC1344
TYPICAL APPLICATIONS N
Cable Selectable Multiprotocol DTE Port with DB-25 Connector
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
C3
1µF C1
1µF
C5
1µF
R1
100k
1
44
2
43
4
42
CHARGE
3
PUMP
8
41
LTC1343
5
D1
39
38
6
D2
37
36
7
D3
35
9
34
D4
33
10
12
13
32
R1
31
14
30
R2
29
28
15
R3
27
16
R4
20
22 CTRL
LATCH
11
INVERT
25 423 SET
26
21
DCE
19
M2
18
M1
17
M0
40
23 GND
LB
24
EC
14
VCC
C2
1µF
2
C4
VEE
3.3µF
VCC
VCC
C11
1µF C9
1µF
VCC
C12
1µF
VCC
R2
100k
1
44
2
43
4
42
CHARGE
3
PUMP
8
41
LTC1343
5
39
D1
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
22 CTRL
LATCH
11
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
1344 TA03
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
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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