LTC1344A Просмотр технического описания (PDF) - Linear Technology
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LTC1344A Datasheet PDF : 12 Pages
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LTC1344A
TYPICAL APPLICATIONS N
Cable Selectable Multiprotocol DTE/DCE Port with DB-25 Connector
C6 C7 C8
100pF 100pF 100pF
DTE_TXD/DCE_RXD
DTE_SCTE/DCE_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
VCC
5V
3
28
C3
1µF
C1
1µF
1
27
CHARGE
26
2
PUMP
4
25
C5
1µF
LTC1543
24
5
D1
23
22
6
D2
21
7
D3
20
8
R1
19
18
9
R2
17
16
10
R3
15
11
M0
12 M1
13
NC
M2
14 DCE/DTE
C9, 1µF
C10
1µF
VCC
1 VCC
2 VDD
3
D1
4
D2
5
D3
28
VEE 27
GND
26
25
24
23
3 8 11 12 13
LTC1344A
C13
1µF
C2
1µF
C4
3.3µF
14
VCC
2 VEE
C12 5 4 6 7 9 10
1µF
21
LATCH
16 15 18 17 19 20 22 23 24 1
VCC
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
7
SG
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
1 SHIELD
DB-25
CONNECTOR
25
21 DCE/DTE
C11
M1
1µF
18 M0
4 RTS A CTS A
19 RTS B
20
DTR A
23
DTR B
CTS B
DSR A
DSR B
LTC1544
22
6
R1
21
20
7
R2
19
18
8
R3
17
10
16
R4
CABLE WIRING FOR MODE SELECTION
9
D4
MODE
V.35
11
M0
RS449, V.36
12
M1
RS232
13
NC
14
M2
DCE/DTE INVERT
15
NC
PIN 18
PIN 7
NC
PIN 7
PIN 21
PIN 7
PIN 7
NC
CABLE WIRING FOR
DTE/DCE SELECTION
MODE
PIN 25
DTE
PIN 7
DCE
NC
8
DCD A
10
DCD B
6
DSR A
22
DSR B
5
CTS A
13 CTS B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
1344A TA05
10
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