mxl1544 Maxim Integrated Products, Inc., mxl1544 Datasheet - Page 14

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

+5V Multiprotocol, Software-Selectable
Control Transceivers
Figure 14. V.11 Internal Resistance Networks
Figure 16 shows a port with one DB-25 connector that
can be configured for either DTE or DCE operation. The
configuration requires separate cables for proper sig-
nal routing in DTE or DCE operation. Figure 16 illus-
trates a DCE or DTE controller-selectable interface. The
DCE/DTE and INVERT inputs switch the port’s mode of
operation (Table 1).
The MXL1543 and MXL1544/MAX3175 can be connect-
ed for either DTE or DCE operation in one of two ways:
a dedicated DTE or DCE port with an appropriate gen-
der connector or a port with a connector that can be
configured for DTE or DCE operation by rerouting the
signals to the MXL1543 and MXL1544/MAX3175 using
14
A′
B′
C′
______________________________________________________________________________________
A
B
GND
S3
R8
5kΩ
30kΩ
30kΩ
R5
R4
10kΩ
R6
DTE vs. DCE Operation
R7
10kΩ
RECEIVER
MXL1544
MAX3175
a dedicated DTE cable or dedicated DCE cable. The
interface mode is selected by logic outputs from the
controller or from jumpers to either V
mode select pins. A dedicated DCE port using a DB-25
female connector is shown in Figure 17. Figure 18 illus-
trates a dedicated DTE port using a DB-25 male con-
nector.
Figure 15. V.28 Termination and Internal Resistance Network
A′
B′
C′
A
B
GND
S3
R8
5kΩ
30kΩ
30kΩ
R5
R4
10kΩ
10kΩ
R6
R7
CC
RECEIVER
MAX3175
MXL1544
or GND on the