LTC1544 Linear Technology, LTC1544 Datasheet - Page 19

• Manufacturer Part Number: LTC1544
• Description: Software-Selectable Multiprotocol Transceiver
• Manufacturer: Linear Technology

TYPICAL APPLICATIO S
DTE_RXC/DCE_SCTE
DTE_SCTE/DCE_RXC
DTE_DCD/DCE_DCD
DTE_TXD/DCE_RXD
DTE_RXD/DCE_TXD
DTE_DTR/DCE_DSR
DTE_DSR/DCE_DTR
DTE_TXC/DCE_TXC
DTE_RTS/DCE_CTS
DTE_CTS/DCE_RTS
C10
1 F
C3
1 F
Figure 26. Cable-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector
V
5V
CC
1 F
C1
C9
1 F
C5
1 F
NC
NC
V
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.
CC
10
11
12
13
14
10
11
12
13
14
3
1
2
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
U
V
V
M0
M1
M2
DCE/DTE
M0
M1
M2
DCE/DTE
CC
DD
LTC1544
LTC1543
CHARGE
D1
D2
D3
D1
D2
D3
D4
PUMP
R1
R2
R3
R1
R2
R3
R4
INVERT
GND
V
EE
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
NC
+
C2
1 F
CABLE WIRING FOR MODE SELECTION
C4
3.3 F
RS449, V.36
RS232
MODE
V.35
C11
1 F
C13
1 F
C12
1 F
14
2
PIN 18
PIN 7
PIN 7
NC
V
V
CC
EE
100pF
C6
3
5
PIN 21
100pF
4
PIN 7
PIN 7
NC
C7
6
8
100pF
7
C8
11
9
CABLE WIRING FOR
DTE/DCE SELECTION
MODE
10
DTE
DCE
12
16
13
15 18 17 19 20 22
PIN 25
PIN 7
NC
LTC1344A
V
CC
23 24
LATCH
1
21
14
24
12
17
21
18
10
22
13
11
15
16
25
19
20
23
LTC1544
2
9
7
1
4
8
6
5
1544 F26
3
RXC A
RXC B
RXD A
RXD B
SG
SHIELD
DCE/DTE
M1
M0
RTS A
RTS B
DTR A
DTR B
DSR A
DSR B
CTS A
CTS B
DTE
TXD A
TXD B
SCTE A
SCTE B
TXC A
TXC B
DCD A
DCD B
CONNECTOR
DB-25
19
DCE
RXD A
RXD B
RXC A
RXC B
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
CTS A
CTS B
DSR A
DSR B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B