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
BLOCK DIAGRA SM
LTC1321 Interface Configuration With Loopback
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
1
VDD
24
22
VCC
RA1
5
Y1
20
DY1
SEL1 6
19
LB
7
SEL2
8
Y2
12
GND
18 ON
17 DY2
15
13 RA2
VEE
*SEL1/SEL2 = VCC
VDD
Z1
Y1
*SEL1
SEL2
Y2
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
1
24 VCC
4
22 RA1
21 DE1
5
20
DY1
6
19
LB
7
18
ON
8
17
DY2
12
GND
15
13 RA2
VEE
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
1
VDD
24
22
VCC
RA1
5
Y1
20
DY1
SEL1 6
*SEL2 7
Y2 8
Z2 9
12
GND
19
LB
18
ON
17 DY2
16 DE2
15 RA2
13
VEE
VDD
Z1
Y1
*SEL1
*SEL2
Y2
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
1
24 VCC
4
22 RA1
21 DE1
5
20
DY1
6
19
LB
7
18 ON
8
17 DY2
Z2 9
12
GND
16 DE2
15
13
RA2
VEE
1321 BD02
LTC1322/LTC1335 Interface Configuration Without Loopback
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
*VDD/OE 1 *
B1 2
A1 3
4
Z1
5
Y1
6
SEL1
7
SEL2
8
Y2
Z2 9
A2 10
11
B2 12
GND
24 VCC *VDD/OE
B1
1*
2
23
RB1
22 RA1
21 DZ1
20 DY1
19 LB
18 ON
17 DY2
16 DZ2
15 RA2
14
13
RB2
VEE
A1 3
Z1
Y1
4
5
**SEL1 6
SEL2 7
8
Y2
9
Z2
A2 10
11
B2
GND
12
24 VCC *VDD/OE
23
RB1
B1
22
RA1
A1
1*
2
3
21
DE1
4
Z1
20
DY1
5
Y1
6
SEL1
19 LB
7
**SEL2
18 ON
17 DY2
16
DZ2
8
Y2
9
Z2
15
RA2
14
13
RB2
VEE
10
A2
11
B2
12
GND
24 VCC *VDD/OE
B1
1*
2
23
RB1
22 RA1
A1 3
21 DZ1
4
Z1
20 DY1
Y1 5
19 LB **SEL1 6
18
**SEL2 7
ON
17 DY2
Y2 8
9
Z2
16 DE2
10
15
RA2
14
13
RB2
VEE
A2
B2 11
12
GND
24 VCC
23 RB1
22 RA1
21 DE1
20 DY1
19 LB
18
ON
17 DY2
16 DE2
15
RA2
14
13
RB2
VEE
* FOR LTC1322 ONLY, PIN 1 IS VDD, AND OE IS ALWAYS ENABLED.
FOR LTC1335, PIN 1 IS OE, AND VDD IS CONNECTED TO VCC.
** SEL1/SEL2 = VCC.
1322/35 BD01
10
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