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ISO1044
  • ISO1044

ISO1044

ACTIVE

Isolated CAN FD transceiver in small package

Texas Instruments ISO1044 Product Info

1 April 2026 4

Parameters

Rating

Catalog

Isolation rating

Basic

Data rate (max) (Mbps)

5

Working isolation voltage (VIOWM) (Vrms)

459

Surge isolation voltage (VIOSM) (VPK)

5000, 8000

Transient isolation voltage (VIOTM) (VPK)

4242

Withstand isolation voltage (VISO) (Vrms)

3000

CMTI (min) (kV/µs)

85

Supply voltage (V)

1.71 to 5.5, 4.5 to 5.5

Bus fault voltage (V)

-58 to 58

Common-mode voltage (V)

-12 to 12

Operating temperature range (°C)

-40 to 125

Package

SOIC (D)-8-29.4 mm² 4.9 x 6

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
  • 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

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.

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