Rainbow-electronics MAX13175E Bedienungsanleitung PDF herunterladen (Seite 31)

MAX13171E/MAX13173E/MAX13175E

Multiprotocol, Pin-Selectable

Data Interface Chipset

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DTE/DCE Mode Applications

The MAX13171E/MAX13173E can be hardwired for

either DTE or DCE mode in one of two ways: a dedicat-

ed DTE or DCE port with an appropriate gender con-

nector, or a port with a connector that can be configured

for DTE or DCE operation by rerouting the signals to the

MAX13171E and MAX13173E, using 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

or GND on the mode select inputs.

A dedicated DCE port using a DB-25 female connector

is shown in Figure 28. Figure 29 illustrates a dedicated

DTE port using a DB-25 male connector.

Figure 27 shows an application circuit with one com-

mon DB-25 connector that can be configured for either

DTE or DCE mode. The configuration requires separate

cables for proper signal routing in DTE or DCE opera-

tion. Figure 27 illustrates a DCE or DTE controller-selec-

table interface. The DCE/DTE and INVERT inputs switch

the port’s mode of operation (Tables 1, 2).

50Ω

125Ω

50Ω

125Ω

A′

B′

C′

GND GND

GENERATOR

BALANCED

INTERCONNECTING

CABLE

TERMINATION

RECEIVER

LOAD

Figure 25. Typical V.35 Interface

11kΩ

5kΩ

127Ω

52Ω

A′

B′

C′

GND

55kΩ

1.4V

11kΩ

55kΩ

MAX13175E

MAX13171E

RECEIVER

Figure 26. V.35 Termination and Internal Resistance Networks

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 37 38

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