ISO6741 datasheet(29/46 Pages) TI

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9 Application 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

The ISO674x-Q1 devices are high-performance, quad-channel digital isolators. These devices come with enable

pins on each side which can be used to put the respective outputs in high impedance for multi master driving

applications. The ISO674x-Q1 devices use single-ended CMOS-logic switching technology. The supply voltage

range is from 1.71 V to 5.5 V for both supplies, VCC1 and VCC2. Since an isolation barrier separates the two

sides, each side can be sourced independently with any voltage within recommended operating conditions. As

an example, it is possible to supply ISO674x-Q1 VCC1 with 3.3 V (which is within 1.71 V to 5.5 V) and VCC2 with

5V (which is also within 1.71 V to 5.5 V). You can use the digital isolator as a logic-level translator in addition to

providing isolation. When designing with digital isolators, keep in mind that because of the 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

Figure 9-1 shows the typical isolated CAN interface implementation.

0.1 F

10 F

MBR0520L

1:1.33

10 F

SN6505x-Q1

GND

3.3 V

GND

OUT

TPS76333-Q1

10 F

ISO 3.3V

VCC

GND

CANH1

CANL1

RXD1

TXD1

0.1 F

TCAN1046-Q1

ISO Barrier

Vcc

0.1 F

VCC1

VCC2

GND1

GND2

INA

OUTA

INC

OUTC

ISO6742-Q1

3,7

2,6

INB

OUTD

OUTB

IND

0.1 F

2,8

9,15

RXD2

TXD2

CANH2

CANL2

System Controller

STBx

11,14

VDD

CAN FD

Controller

CAN FD

Controller

Figure 9-1. Typical Isolated CAN Application Circuit

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ISO6740-Q1, ISO6741-Q1, ISO6742-Q1

SLLSFG4C – DECEMBER 2019 – REVISED MARCH 2021

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Product Folder Links: ISO6740-Q1 ISO6741-Q1 ISO6742-Q1

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