Robust Isolated Bidirectional, I2C Compatible, Communication
ISO1640: Bidirectional Isolated SDA and SCL communication
ISO1641: Bidirectional Isolated SDA and unidirectional SCL communication
ISO1644: Bidirectional Isolated SDA and SCL communication with 3 Unidirectional GPIO channels
Hot-Swappable SDA and SCL
Bidirectional data transfer up to 1.7 MHz Operation
Up to 3 additional unidirectional isolation channels supporting speeds up to 50 Mbps operation
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
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) Sink Current 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
Description for the ISO1641
The ISO1644,ISO1640 and ISO1641 (ISO164x) devices are hot swappable, low-power, bidirectional isolators 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 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 ISO1644 and ISO1640 has two isolated bidirectional channels for clock and data lines while 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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