mxl1544 Maxim Integrated Products, Inc., mxl1544 Datasheet - Page 12

• Manufacturer Part Number: mxl1544
• Description: +5v, Multiprotocol, Software-selectable Control Transceivers
• Manufacturer: Maxim Integrated Products, Inc.

+5V Multiprotocol, Software-Selectable
Control Transceivers
Figure 9. Cable-Selectable Multiprotocol DCE/DTE Port with DB-25 Connector
12
______________________________________________________________________________________
DTE_SCTE/DCE_RXC
DTE_RXC/DCE_SCTE
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
1µF
C10
C3
4.7µF
1µF
V
C9
5V
CC
1µF
C1
C4
1µF
NC
NC
V
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
DCE/DTE INVERT
M0
M1
M2
DCE/DTE
V
V
M0
M1
M2
CC
DD
MXL1543
MXL1544
MAX3175
CHARGE
D1
D2
D3
D1
D2
D3
D4
PUMP
R1
R2
R3
R1
R2
R3
R4
GND
V
EE
28
27
26
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
C2
1µF
C5
4.7µF
MODE
V.35
RS-449. V.36
RS-232
C13
1µF
C11
1µF
CABLE WIRING FOR
MODE SELECTION
14
C12
1µF
2
PIN 18
PIN 7
N.C.
PIN 7
V
V
CC
EE
100pF
C6
5
3
PIN 21
PIN 7
PIN 7
N.C.
4
100pF
C7
6 7
8
100pF
C8
11
9 10 16 15 18 17 19 20 22 23 24 1
DTE/DCE SELECTION
CABLE WIRING FOR
MODE
DTE
DCE
12 13
PIN 25
PIN 7
N.C.
MXL1344A
V
CC
LATCH
21
14
24
11
15
12
17
16
25
21
18
19
20
23
10
22
13
2
9
3
7
1
4
8
6
5
TXD A
TXD B
SCTE A
SCTE B
DCE/DTE
M1
M0
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
TXC A
TXC B
RXC A
RXC B
RXD A
RXD B
SG
SHIELD
DTE
CONNECTOR
DB-25
SCTE A
SCTE B
DCD A
DCD B
RXD A
RXD B
RXC A
RXC B
TXC A
TXC B
TXD A
TXD B
CTS A
CTS B
DSR A
DSR B
DTR A
DTR B
RTS A
RTS B
DCE