LTC1321CS datasheet(9/20 Pages) LINER

Part #	LTC1321CS

Description	Features Receiver Three-State Outputs Low Supply Current: 1mA Typical

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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9

LTC1321/LTC1322/LTC1335

FU CTIO TABLES

LTC1321 Interface Configuration Without Loopback

1321BD01

RA1

VCC

VDD

A1

DY1

ON

* SEL1/SEL2 = VCC

Y1

PORT 1 = EIA562 MODE

PORT 2 = EIA562 MODE

DY2

Y2

SEL1

SEL2

24

22

1

3

5

6

7

8

20

19

LB

18

17

GND

VEE

12

13

RA2

A2

10

15

PORT 1 = RS485 MODE

PORT 2 = RS485 MODE

VDD

B1

A1

Z1

Y1

1

2

3

4

5

6

7

8

9

12

10

11

DY1

6

RA1

VCC

VDD

B1

A1

DE1

ON

Z1

Y1

PORT 1 = RS485 MODE

PORT 2 = EIA562 MODE

DY2

Y2

*SEL1

SEL2

24

22

1

2

3

5

4

7

8

21

20

LB

18

19

17

GND

VEE

12

13

RA2

A2

10

15

DY1

RA1

VCC

DE1

ON

DY2

DE2

24

22

21

20

LB

17

19

18

16

VEE

13

RA2

15

RA1

VCC

VDD

A1

DY1

ON

DE2

Y1

PORT 1 = EIA562 MODE

PORT 2 = RS485 MODE

DY2

SEL1

24

22

1

3

5

6

7

8

9

20

19

LB

18

17

1

16

12

13

10

11

15

Y2

Z2

GND

VEE

RA2

B2

A2

Y2

Z2

A2

GND

B2

*SEL2

*SEL1

RS485 Receiver Mode

OUTPUT

ON/OFF

SEL

OE

A – B

R

1

0

< – 0.2V

0

1

0

> 0.2V

1

0

Inputs Open

1

11

1

X

Z

01

X

Z

RS485 Driver Mode

INPUTS

LINE

OUTPUTS

ON/OFF

SEL

DE

D

CONDITION

Y

Z

1

0

No Fault

0

1

No Fault

1

0

1

X

Fault

Z

11

0

X

Z

01

X

Z

INPUTS

LTC1335

BLOCK DIAGRA SM

EIA562 Driver Mode

INPUTS

LINE

OUTPUT

ON/OFF

SEL

D

CONDITION

Y, Z

1

0

No Fault

1

0

1

No Fault

0

1

0

X

Fault

Z

00

X

Z

INPUTS

EIA562 Receiver Mode

OUTPUT

ON/OFF

SEL

OE

A OR B

R

10

0

1

10

0

1

0

1

0

Input Open

1

10

1

X

Z

00

X

Z

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LTC1321CS Datasheet(PDF) 9 Page - Linear Technology

LTC1321CS Datasheet(HTML) 9 Page - Linear Technology

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