ISO1044 Isolated CAN FD Transceiver in Small Package

1 Features

• Meets the ISO 11898-2:2016 physical layer

standard

• Supports classic CAN up to 1 Mbps and FD

(flexible data rate) up to 5 Mbps

• Protection features

– DC Bus Fault Protection Voltage: ±58 V

– IEC ESD tolerance on bus pins: ±8 kV

– HBM ESD tolerance on bus pins: ±10 kV

– Driver dominant time out (TXD DTO)

– Undervoltage protection on VCC1 and VCC2

• Common-mode voltage range: ±12 V

• Ideal passive, high impedance bus terminals when

unpowered

• High CMTI: 85 kV/µs minimum

• VCC1 voltage range: 1.71 V to 5.5 V

– Supports 1.8-V, 2.5-V, 3.3-V and 5.0-V logic

interface to the CAN controller

• VCC2 voltage range: 4.5 V to 5.5 V

• Robust electromagnetic compatibility (EMC)

– System-Level ESD, EFT, and surge Immunity

– Low Emissions

• Ambient temperature range: –40°C to +125°C

• 8-SOIC package

• Safety-related certifications:

– All certifications planned

– VDE reinforced insulation per DIN VDE V

0884-11:2017-01

– UL 1577 component recognition program

– IEC 60950-1, IEC 62368-1, IEC 61010-1 and

GB 4943.1-2011 certifications

2 Applications

• AC and servo drives

• Solar inverters

• PLC and DCS communication modules

• Elevators and escalators

• Industrial power supplies

• Battery charging and management

3 Description

The ISO1044B device is a galvanically-isolated

controller area network (CAN) transceiver that meets

the specifications of the ISO11898-2 (2016) standard.

The ISO1044B device offers ±58-V DC bus fault

protection and ±12-V common-mode voltage range.

The device supports up to 5-Mbps data rate in CAN

FD mode allowing much faster transfer of payload

compared to classic CAN. This device uses a silicon

dioxide (SiO2) insulation barrier with a withstand

voltage of 3000 VRMS and a working voltage of 450

VRMS. Electromagnetic compatibility has been

significantly enhanced to enable system-level ESD,

EFT, surge, and emissions compliance. Used in

conjunction with isolated power supplies, the device

protects against high voltage, and prevents noise

currents from the bus from entering the local ground.

The ISO1044B device supports a wide ambient

temperature range of –40°C to +125°C. The device is

available in the small SOIC-8 (D) package which

significantly reduces the solution size compared to a

traditional approach using optocouplers to isolate the

CAN transceiver.

Device Information

PART NUMBER(1)

PACKAGE

BODY SIZE (NOM)

ISO1044B

SOIC (8)

4.90 mm × 3.91 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

1

2

4

3

6

5

7

TXD

VCC1

RXD

GND1

CANL

GND2

8

VCC2

MCU

RXD

TXD

VDD

DGND

Digital

Gro und

ISO

Gro und

CAN B us

Gal van ic

Isol atio n B arrier

ISO104 4

CANH

VCC1

VCC2

Copyright © 201 7, Texas Instrumen ts Incorpor ate d

Application Diagram

www.ti.com

ISO1044

SLLSFB0A – MARCH 2020 – REVISED JULY 2020

Copyright © 2020 Texas Instruments Incorporated

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ISO1044

SLLSFB0A – MARCH 2020 – REVISED JULY 2020

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.