C2

1

2

3

4

5

6

7

8

D1

D2

GND1

R

RE

DE

D

A

B

GND2

Z

Y

C3

16

14

13

12

11

15

9, 10

OUT

NC

C6

IN

EN

GND

5

1

LDO

1

3

2

C5

C4

D1

D2

8

7

6

5

4

3

2

1

C1

X-FMR

ISO3086T

Isolated Supply to

other Components

RS-485 Bus

Interface

Control

Circuitry

ISO3086T

SLLSE27C

– JANUARY 2011 – REVISED JULY 2011

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Figure 1. Typical Application Circuit (For Details See SLUU469)

PIN DESCRIPTIONS

NAME

PIN No.

FUNCTION

D1

1

Transformer Driver Terminal 1, Open Drain Output

D2

2

Transformer Driver Terminal 2, Open Drain Output

GND1

3

Logic-side Ground

4

Logic-side Power Supply

R

5

Receiver Output

RE

6

Receiver Enable Input. This pin has complementary logic.

DE

7

Driver Enable Input

D

8

Driver Input

GND2

9, 15

Bus-side Ground. Both pins are internally connected.

NC

10

No Connect. This pin is not connected to any internal circuitry.

Y

11

Non-inverting Driver Output

Z

12

Inverting Driver Output

B

13

Inverting Receiver Input

A

14

Non-inverting Receiver Input

16

Bus-side Power Supply

2

Copyright

© 2011, Texas Instruments Incorporated