Ultra-low power, ATEX/IECEx-certified, two-channel digital isolator


Product details


Integrated isolated power No Number of channels (#) 2 Forward/reverse channels 1/1 Isolation rating (Vrms) 3000 Data rate (Max) (Mbps) 4 Rating Catalog Surge voltage capability (Vpk) 6400 Current consumption per channel (DC) (Typ) (mA) 0.00475 Current consumption per channel (1 Mbps) (Typ) (mA) 0.12 Operating temperature range (C) -55 to 125 Default output High, Low Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 1.71 Propagation delay (Typ) (ns) 140 open-in-new Find other Digital isolators

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Digital isolators


  • Ultra-low power consumption
    • 4.8 µA per channel quiescent current (3.3 V)
    • 15 µA per channel at 100 kbps (3.3 V)
    • 120 µA per channel at 1 Mbps (3.3 V)
  • Robust isolation barrier
    • >100-year projected lifetime
    • 3000 VRMS isolation rating
    • ±100 kV/µs typical CMTI
  • Wide supply range: 1.71 V to 1.89 V and 2.25 V to 5.5 V
  • Wide temperature range: –55°C to +125°C
  • Small 8-SOIC package (8-D)
  • Signaling rate: Up to 4 Mbps
  • Default output High (ISO7021) and Low (ISO7021F) options
  • Robust electromagnetic compatibility (EMC)
    • System-level ESD, EFT, and surge immunity
    • ±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier
    • Very low emissions
  • Safety-related certifications (planned):
    • DIN V VDE 0884-11:2017-01
    • UL 1577 Component Recognition Program
    • IEC 60950-1, IEC 62368-1, IEC 61010-1, IEC60601-1 and GB 4943.1-2011 certifications
    • IECEx (IEC 60079-0 & IEC 60079-11) and ATEX (EN IEC60079-0 & EN 60079-11)

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The ISO7021 device is an ultra-low power, multichannel digital isolator that can be used to isolate CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by a double capacitive silicon dioxide (SiO2) insulation barrier. Innovative edge based architecture combined with an ON-OFF keying modulation scheme allows these isolators to consume very-low power while meeting 3000-VRMS isolation rating per UL1577. The per channel dynamic current consumption of the device is under 120 µA/Mbps and the per channel static current consumption is 4.8 µA at 3.3 V, allowing for use of the ISO7021 in both power and thermal constrained system designs.

The device can operate as low as 1.71 V, as high as 5.5 V , and is fully functional with different supply voltages on each side of isolation barrier. The two-channel isolator comes in a narrow body 8-SOIC package with one forward and one reverse-direction channel in a 8-SOIC package. The device has default output high and low options. If the input power or signal is lost, default output is high for the ISO7021 device without the suffix F and low for the ISO7021F device with the F suffix. See the Device Functional Modes section for more information.

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Technical documentation

Design & development

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Hardware development

document-generic User guide
The ISO7041DBQEVM is an evaluaiton module used to evaluate the ISO7041 low-power quad channel digital isolator in a 16-pin SSOP package (package code, DBQ). The EVM features enough test points, jumper option, and current sense capabilities for you to evaluate the device with minimal (...)
  • Ultra-low-power consumption
  • 4-kV surge isolation
  • 2 Mbps

CAD/CAE symbols

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SOIC (D) 8 View options

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