LTC1544 Просмотр технического описания (PDF) - Linear Technology
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LTC1544 Datasheet PDF : 20 Pages
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LTC1544
TYPICAL APPLICATIO S
DTE_TXD/DCE_RXD
DTE_SCTE/DCE_RXC
DTE_TXC/DCE_TXC
DTE_RXC/DCE_SCTE
DTE_RXD/DCE_TXD
VCC
5V
3
28
C3
1µF C1
1µF
C2
1
27
1µF
2
CHARGE
PUMP
26
4
25
C4
3.3µF
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 M2
14
DCE/DTE
C6 C7 C8
100pF 100pF 100pF
3 8 11 12 13
LTC1344A
14
VCC
C13
1µF
21
LATCH
2 VEE
C12
1µF
5 4 6 7 9 10
16 15 18 17 19 20 22 23 24 1
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
1 SHIELD
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
C10
1µF
DTE_RTS/DCE_CTS
DTE_DTR/DCE_DSR
DTE_DCD/DCE_DCD
DTE_DSR/DCE_DTR
DTE_CTS/DCE_RTS
DTE_LL/DCE_LL
DCE/DTE
M2
M1
M0
C9
VCC
1µF
1 VCC
2 VDD
28
VEE 27
GND
C11
1µF
26
3
D1
25
24
4
D2
23
5
D3
LTC1544
22
6
R1
21
20
7
R2
19
18
8
R3
17
10
16
R4
9
D4
11
15
M0
INVERT
NC
12
M1
13
M2
14
DCE/DTE
DB-25
CONNECTOR
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
DSR A
22
DSR B
5
CTS A
13
CTS B
18
LL A
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
LL A
Figure 24. Controller-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector
1544 F24
17
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