RS485 Ver la hoja de datos (PDF) - Linear Technology
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RS485 Datasheet PDF : 20 Pages
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LTC1321/LTC1322/LTC1335
UU
FU CTIO TABLES
LTC1321
RS485 Driver Mode
INPUTS
ON/OFF SEL DE D
1
1
10
1
1
11
1
1
1X
1
1
0X
0
1
XX
LINE
CONDITION
No Fault
No Fault
Fault
X
X
OUTPUTS
Y
Z
0
1
1
0
Z
Z
Z
Z
Z
Z
RS485 Receiver Mode
ON/OFF
INPUTS
SEL
1
1
1
1
1
1
0
1
A–B
< – 0.2V
> 0.2V
Inputs Open
X
OUTPUT
R
0
1
1
Z
RS232/EIA562 Driver Mode
INPUTS
ON/OFF
SEL
D
1
0
0
1
0
1
1
0
X
0
0
X
LINE
CONDITION
No Fault
No Fault
Fault
X
OUTPUT
Y
1
0
Z
Z
RS232/EIA562 Receiver Mode
ON/OFF
INPUTS
SEL
1
0
1
0
1
0
0
0
A
0
1
Inputs Open
X
OUTPUT
R
1
0
1
Z
LTC1322
RS485 Driver Mode
INPUTS
ON/OFF SEL DE D
1
1
10
1
1
11
1
1
1X
1
1
0X
0
1
XX
RS485 Receiver Mode
ON/OFF
INPUTS
SEL
1
1
1
1
1
1
0
1
LINE
CONDITION
No Fault
No Fault
Fault
X
X
A–B
< – 0.2V
> 0.2V
Inputs Open
X
RS232/EIA562 Driver Mode
INPUTS
ON/OFF
SEL
D
1
0
0
1
0
1
1
0
X
0
0
X
LINE
CONDITION
No Fault
No Fault
Fault
X
RS232/EIA562 Receiver Mode
ON/OFF
INPUTS
SEL
1
0
1
0
1
0
0
0
A OR B
0
1
Input Open
X
OUTPUTS
Y
Z
0
1
1
0
Z
Z
Z
Z
Z
Z
OUTPUT
R
0
1
1
Z
OUTPUT
Y, Z
1
0
Z
Z
OUTPUT
R
1
0
1
Z
8
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