Texas Instruments ISO164x/ISO164x-Q1 Digital Isolators

Texas Instruments ISO164x/ISO164x-Q1 Bi-Directional I2C Digital Isolators are hot-swappable, low-power, bidirectional isolators compatible with I2C interfaces. This digital isolator supports UL 1577 isolation ratings of 3000VRMS in the 8-D package. Each isolation channel in this low emissions device has a logic input and open-drain output separated by a double capacitive silicon dioxide (SiO2) insulation barrier. This family includes devices certified by VDE, UL, CSA, TUV, and CQC. The Texas Instruments ISO164x/ISO164x-Q1 has two isolated bidirectional channels for clock and data lines. ISO164x/ISO164x-Q1 integrates logic required to support bidirectional channels, providing a much simpler design and smaller footprint when compared to optocoupler-based solutions. The ISO164x-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Reliable isolated bidirectional, I2C compatible, communication
    • ISO1640 - Fully bidirectional isolated SDA and SCL communication
    • SDA and SCL hot-swappable
  • Bidirectional data transfer up to 1.7MHz operation
  • Robust isolation barrier with enhanced EMC
    • > 100 years projected lifetime at 500VRMS working voltage
    • Up to 3000VRMS isolation rating
    • Up to 5kV surge capability
    • ±100kV/µs typical CMTI
    • ±8kV IEC-ESD 61000-4-2 contact discharge protection across the isolation barrier
    • Same side ±8kV IEC-ESD unpowered contact discharge on SCL2 and SDA2 (side 2)
  • 3V to 5.5V (side 1) and 2.25V to 5.5V (side 2) supply range
  • Open-drain outputs with 3.5mA (side 1) and 50mA (side 2) sink current capability
  • 80pF (side 1) and 400pF (side 2) max. capacitive load
  • 8-SOIC (D-8) package options
  • –40°C to +125°C operating temperature
  • Safety-related certifications (planned)
    • UL 1577 component recognition program
    • DIN V VDE V 0884-11
    • IEC 60950-1, IEC62368-1, IEC 61010-1, IEC 60601-1 and GB4943.1-2011 certifications

Applications

  • Isolated I2C buses
  • SMBus and PMBus interfaces
  • Power Over Ethernet (PoE)
  • Motor control systems
  • Battery management

Functional Block Diagram

Block Diagram - Texas Instruments ISO164x/ISO164x-Q1 Digital Isolators
Published: 2021-01-22 | Updated: 2024-09-10