GND1

GND2

16

13

12

2,8

9,15

UCA0RXD

P3.0

UCA0TXD

16

11

15

4

XOUT

XIN

5

6

2

MSP430

F2132

1

3

4

5

7

0.1F

0.1F

ISO7331

ISO-BARRIER

4.7nF/

2kV

SM712

10 MELF

0.1F

DVss

DVcc

10F 0.1F

MBR0520L

MBR0520L

1:2.2

0.1F

3

1

D2

SN6501

D1

Vcc

4,5

2

GND

IN

EN

GND

OUT

1

5

2

3

TPS76350

10F

10F

10 MELF

3.3V

INA

INB

OUTC

EN1

OUTA

OUTB

INC

SN65HVD

3082E

RE

DE

D

R

EN2

14

10

1

4

3

2

B

A

GND

0.1F

ISO7330C, ISO7330FC, ISO7331C, ISO7331FC

www.ti.com

SLLSEK9B – JANUARY 2015 – REVISED APRIL 2015

9 Applications and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

ISO733x utilize single-ended TTL-logic switching technology. Its supply voltage range is from 3 V to 5.5 V for

single-ended design structure, digital isolators do not conform to any specific interface standard and are only

intended for isolating single-ended CMOS or TTL digital signal lines. The isolator is typically placed between the

data controller (that is,

μC or UART), and a data converter or a line transceiver, regardless of the interface type

or standard.

9.2 Typical Application

ISO7331C combined with Texas Instruments' mixed signal micro-controller, RS-485 transceiver, transformer

driver, and voltage regulator can create an isolated RS-485 system as shown in Figure 18.

Figure 18. Typical ISO7331 Application Circuit

Copyright © 2015, Texas Instruments Incorporated

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Product Folder Links: ISO7330C ISO7330FC ISO7331C ISO7331FC