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SP304

RS-232/RS-422 Line Drivers/Receivers

Signal Processing Technologies 

FIGURE 5: SP304 CONFIGURATIONS

Two-Channel Duplex RS-232 &

One-Channel Duplex RS-422

Opposite Drivers

Two RS-232 line drivers and receivers, and a

single RS-422 line driver and receiver. At first

glance, this is the same configuration as that in

Figure 4. Note however that functions are acti-

vated on the opposite channels.

Two-Channel Duplex RS-422

Two RS-422 line drivers and two RS-422

receivers.

TIB1

TOB1

TIB2

TOB2

RS-232 LINE DRIVERS

RS-232 RECEIVER

ROB1

RIB1

ROB2

RIB2

TIA1

TOA1

TOA2

RS-422 LINE DRIVER

RS-422 RECEIVER

ROA1

RIA1

RIA2

SELECT A = 1

SELECT B = 0

LB = 1

TIA1

TOA1

TOA2

TIB1

TOB1

TOB2

RS-422 LINE DRIVERS

RS-422 RECEIVERS

ROA1

RIA1

RIA2

ROB1

RIB1

RIB2

SELECT A = 1

SELECT B = 1

LB = 1

Corporation

SIGNAL PROCESSING EXCELLENCE

85

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