Product details

Serial clock Bi-directional Number of channels (#) 4 Isolation rating (Vrms) 5000 Serial data Bi-directional Operating temperature range (C) -40 to 125 Data rate (Max) (Mbps) 1.7 Surge voltage rating (Vpk) 10000 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.25
Serial clock Bi-directional Number of channels (#) 4 Isolation rating (Vrms) 5000 Serial data Bi-directional Operating temperature range (C) -40 to 125 Data rate (Max) (Mbps) 1.7 Surge voltage rating (Vpk) 10000 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.25
SOIC (DW) 16 77 mm² 10.3 x 7.5
  • Robust Isolated Bidirectional, I2C Compatible, Communication
    • ISO1640: Bidirectional SDA and SCL communication
    • ISO1641: Bidirectional SDA and unidirectional SCL communication
    • ISO1642/3/4: Bidirectional SDA and SCL communication with either 2 or 3 unidirectional GPIO channels
    • Hot-Swappable SDA and SCL
  • Bidirectional data transfer up to 1.7 MHz Operation
  • Up to 3 additional unidirectional isolated GPIO channels supporting 50 Mbps speed
  • Robust isolation barrier with enhanced EMC:
    • >100-year projected lifetime at 450 VRMS working voltage (D-8) and 1500 VRMS working voltage (DW-16)
    • Up to 5000 VRMS isolation rating per UL1577
    • Up to 10 kV reinforced surge capability
    • ±100 kV/µs typical CMTI
    • ±8 kV IEC-ESD 61000-4-2 contact discharge protection across isolation barrier
    • Same side ±8 kV IEC-ESD unpowered contact discharge on SCL2 and SDA2 (Side 2)
  • Supply range: 3 V to 5.5 V (Side 1) and 2.25 V to 5.5 V (Side 2)
  • Open-drain outputs with 3.5-mA (Side 1) and 50-mA (Side 2) current-sink capability
  • Max capacitive load: 80 pF (Side 1) and 400 pF (Side 2)
  • 16-SOIC (DW-16) and 8-SOIC (D-8) Package Options
  • –40°C to +125°C Operating Temperature
  • Safety-Related Certifications (planned):
    • UL 1577 Component Recognition Program
    • DIN VDE V 0884-11
    • IEC 62368-1, IEC 61010-1, IEC 60601-1 and GB4943.1-2011 certifications
  • Robust Isolated Bidirectional, I2C Compatible, Communication
    • ISO1640: Bidirectional SDA and SCL communication
    • ISO1641: Bidirectional SDA and unidirectional SCL communication
    • ISO1642/3/4: Bidirectional SDA and SCL communication with either 2 or 3 unidirectional GPIO channels
    • Hot-Swappable SDA and SCL
  • Bidirectional data transfer up to 1.7 MHz Operation
  • Up to 3 additional unidirectional isolated GPIO channels supporting 50 Mbps speed
  • Robust isolation barrier with enhanced EMC:
    • >100-year projected lifetime at 450 VRMS working voltage (D-8) and 1500 VRMS working voltage (DW-16)
    • Up to 5000 VRMS isolation rating per UL1577
    • Up to 10 kV reinforced surge capability
    • ±100 kV/µs typical CMTI
    • ±8 kV IEC-ESD 61000-4-2 contact discharge protection across isolation barrier
    • Same side ±8 kV IEC-ESD unpowered contact discharge on SCL2 and SDA2 (Side 2)
  • Supply range: 3 V to 5.5 V (Side 1) and 2.25 V to 5.5 V (Side 2)
  • Open-drain outputs with 3.5-mA (Side 1) and 50-mA (Side 2) current-sink capability
  • Max capacitive load: 80 pF (Side 1) and 400 pF (Side 2)
  • 16-SOIC (DW-16) and 8-SOIC (D-8) Package Options
  • –40°C to +125°C Operating Temperature
  • Safety-Related Certifications (planned):
    • UL 1577 Component Recognition Program
    • DIN VDE V 0884-11
    • IEC 62368-1, IEC 61010-1, IEC 60601-1 and GB4943.1-2011 certifications

The ISO1640, ISO1641, ISO1642, ISO1643 and ISO1644 (ISO164x) device s are hot swappable, low-power, bidirectional isolator s that are compatible with I2C interfaces. The ISO164x supports UL 1577 isolation ratings of 5000 VRMS in the 16-DW package, and 3000 VRMS in the 8-D package. Each I2C 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. The ISO1642 and ISO1643 intregrates 2 unidirectional CMOS isolation channels, while the ISO1644 intregrates 3 unidirectional CMOS isolation channels which can be used for static GPIO isolation or to isolate a Serial Peripheral Interface (SPI) bus. This family includes basic and reinforced insulation devices certified by VDE, UL, CSA, TUV and CQC. The ISO1640/2/3/4 have two isolated bidirectional channels for clock and data lines and the ISO1641 has a bidirectional data and a unidirectional clock channel. The ISO164x family integrates logic required to support bidirectional channels, providing a much simpler design and smaller footprint when compared to optocoupler-based solutions.

The ISO1640, ISO1641, ISO1642, ISO1643 and ISO1644 (ISO164x) device s are hot swappable, low-power, bidirectional isolator s that are compatible with I2C interfaces. The ISO164x supports UL 1577 isolation ratings of 5000 VRMS in the 16-DW package, and 3000 VRMS in the 8-D package. Each I2C 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. The ISO1642 and ISO1643 intregrates 2 unidirectional CMOS isolation channels, while the ISO1644 intregrates 3 unidirectional CMOS isolation channels which can be used for static GPIO isolation or to isolate a Serial Peripheral Interface (SPI) bus. This family includes basic and reinforced insulation devices certified by VDE, UL, CSA, TUV and CQC. The ISO1640/2/3/4 have two isolated bidirectional channels for clock and data lines and the ISO1641 has a bidirectional data and a unidirectional clock channel. The ISO164x family integrates logic required to support bidirectional channels, providing a much simpler design and smaller footprint when compared to optocoupler-based solutions.

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Technical documentation

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Type Title Date
* Data sheet ISO164x Hot-Swappable Bidirectional I2C Isolators with Enhanced EMC and GPIOs datasheet (Rev. D) 14 Sep 2021
User guide ISO1644DWEVM Reinforced Isolated I2C With GPIOs Evaluation Module 01 Jun 2021
Application note How Do Isolated I2C Buffers with Hot-Swap Capability and IEC ESD Improve ... 25 Mar 2021
Technical article Top 6 design questions about I2C isolators 13 Mar 2019

Design & development

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Evaluation board

ISO1644DWEVM — ISO1644, ISO1643 and ISO1642 evaluation module for I²C isolator in DW package

ISO1644DWEVM is an evaluation module used to help designers evaluate the ISO1642, ISO1643, and ISO1644 devices' performance for quick development and analysis of data transmision systems using TI's ISO1642, ISO1643, and ISO1644 isolated I²C devices with general purpose input and output channels (...)

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Simulation model

ISO164x IBIS Model (Rev. A)

SLLM460A.ZIP (28 KB) - IBIS Model
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SOIC (DW) 16 View options

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