sp301ct Exar Corporation, sp301ct Datasheet - Page 7

• Manufacturer Part Number: sp301ct
• Description: Rs-232/rs-422 Line Drivers/receivers
• Manufacturer: Exar Corporation

FIGURE 3: SP301 CONTROL LOGIC CONFIGURATION
SIGNAL PROCESSING EXCELLENCE
SELECTION
SELECT A:
SELECT B:
NON–
LOOPBACK
(LB = 1)
LOOPBACK
(LB=0)
Corporation
TOA*
TOB*
TOA
TOB
RIA
RIB
RIA
RIB
RS-232 DRIVER
* Tri–state Output
LOGIC VALUE
1
1
1
1
1
1
1
1
0
0
ROA
TIA
ROB
TIB
ROA
TIA
ROB
TIB
TOB*
TOB*
RIB
RIB
TOA*
TOA
TOB
TOB
RIA
RIB
RIB
RIA
LOGIC VALUE
RS-232 RECEIVER
2
1
1
2
1
1
2
1
1
2
1
1
0
1
ROA
TIA
ROB
TIB
ROA
TIA
ROB
TIB
TOA*
TOA*
RIA
RIA
TOB*
TOB
TOA
TOA
RIB
RIB
RIA
RIA
LOGIC VALUE
RS-422 RECEIVER
2
1
1
2
2
1
1
2
1
1
1
1
1
0
ROB
TIB
ROB
TIB
ROA
TIA
ROA
TIA
TOB*
TOB*
TOA*
TOA*
RIB
RIB
RIA
RIA
TOA
TOA
TOB
TOB
RIA
RIA
RIB
RIB
LOGIC VALUE
2
1
2
1
RS-422 DRIVER
1
2
1
2
2
1
1
2
2
1
1
2
1
1
ROA
TIA
ROB
TIB
ROA
TIA
ROB
TIB
57