RS485 Ver la hoja de datos (PDF) - Linear Technology
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RS485 Datasheet PDF : 20 Pages
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UU
FU CTIO TABLES
LTC1335
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
RS485 Receiver Mode
INPUTS
ON/OFF
SEL
OE
1
1
0
1
1
0
1
1
0
1
1
1
0
1
X
A–B
< – 0.2V
> 0.2V
Inputs Open
X
X
OUTPUTS
Y
Z
0
1
1
0
Z
Z
Z
Z
Z
Z
OUTPUT
R
0
1
1
Z
Z
LTC1321/LTC1322/LTC1335
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, Z
1
0
Z
Z
EIA562 Receiver Mode
INPUTS
ON/OFF
SEL
OE
1
0
0
1
0
0
1
0
0
1
0
1
0
0
X
A OR B
0
1
Input Open
X
X
OUTPUT
R
1
0
1
Z
Z
BLOCK DIAGRA SM
LTC1321 Interface Configuration Without Loopback
VDD
A1
Y1
SEL1
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
1
3
24 VCC
22
RA1
5
20
DY1
6
19 LB
7
SEL2
8
Y2
10
A2
12
GND
18
ON
17 DY2
15
13 RA2
VEE
* SEL1/SEL2 = VCC
VDD
B1
A1
Z1
Y1
*SEL1
SEL2
Y2
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
1
2
24 VCC
3
22 RA1
4
21 DE1
5
20
DY1
6
19 LB
7
18 ON
8
17
DY2
10
A2
12
GND
15
13 RA2
VEE
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
1
VDD 3
A1
24 VCC
22
RA1
5
Y1
SEL1 6
*SEL2 7
Y2 8
Z2 9
A2 10
B2
GND
11
12
20
DY1
19 LB
18
ON
17
DY2
16
DE2
15 RA2
13 VEE
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
VDD
B1
1
2
A1 3
24 VCC
22 RA1
Z1 4
Y1 5
21 DE1
20 DY1
*SEL1 6
*SEL2 7
Y2 8
Z2 9
10
A2
B2 11
12
GND
19 LB
18 ON
17
DY2
16 DE2
15
RA2
13
VEE
1321BD01
9
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