ISO7721 High-speed, robust-EMC reinforced dual-channel digital isolator |

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High-speed, robust-EMC reinforced dual-channel digital isolator



The ISO772x devices are high-performance, dual-channel digital isolators with 5000 VRMS (DW and DWV packages) and 3000 VRMS (D package) isolation ratings per UL 1577. These devices are also certified by VDE, TUV, CSA, and CQC.

The ISO772x devices provide high electromagnetic immunity and low emissions at low power consumption, while isolating 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. The ISO7720 device has both channels in the same direction while the ISO7721 device has both channels in the opposite direction. In the event of input power or signal loss, the default output is high for devices without suffix F and low for devices with suffix F. See the Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, these devices help prevent noise currents on data buses, such as RS-485, RS-232, and CAN, from damaging sensitive circuitry. Through innovative chip design and layout techniques, the electromagnetic compatibility of the ISO772x devices has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO772x family of devices is available in 16-pin SOIC wide-body (DW), 8-pin SOIC wide-body (DWV), and 8-pin SOIC narrow-body (D) packages.


  • 100 Mbps Data Rate
  • Robust Isolation Barrier:
    • >100-Year Projected Lifetime at 1.5 kVRMS Working Voltage
    • Up to 5000 VRMS Isolation Rating
    • Up to 12.8 kV Surge Capability
    • ±100 kV/µs Typical CMTI
  • Wide Supply Range: 2.25 V to 5.5 V
  • 2.25-V to 5.5-V Level Translation
  • Default Output High (ISO772x) and Low (ISO772xF) Options
  • Wide Temperature Range: –55°C to +125°C
  • Low Power Consumption, Typical 1.7 mA per Channel at 1 Mbps
  • Low Propagation Delay: 11 ns Typical
  • Robust Electromagnetic Compatibility (EMC)
    • System-Level ESD, EFT, and Surge Immunity
    • ±8 kV IEC 61000-4-2 Contact Discharge Protection across Isolation Barrier
    • Low Emissions
  • Wide-SOIC (DW-16, DWV-8) and Narrow-SOIC (D-8) Package Options
  • Automotive Version Available: ISO772x-Q1
  • Safety-Related Certifications:
    • VDE Reinforced Insulation according to DIN V VDE V 0884-11:2017-01
    • 5000 VRMS (DW-16, DWV-8) and 3000 VRMS (D-8) Isolation Rating per UL 1577
    • CSA Certification per IEC 60950-1, IEC 62368-1 and IEC 60601-1 End Equipment Standards
    • CQC Certification per GB4943.1-2011
    • TUV Certification according to EN 60950-1 and EN 61010-1

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Part number Order Integrated isolated power Number of channels (#) Forward/reverse channels Isolation rating (Vrms) Surge voltage capability (Vpk) Data rate (Max) (Mbps) Current consumption per channel (DC) (Typ) (mA) Current consumption per channel (1 Mbps) (Typ) (mA) Propagation delay (Typ) (ns) Default output VCC (Min) (V) VCC (Max) (V) Rating Operating temperature range (C)
ISO7721 Order now No     2     1/1     5000
100     1     1.6     10.7     High
2.25     5.5     Catalog     -55 to 125    
ISO7710 Order now No     1     1/0     5000
100     1.1     1.7     10.7     High
2.25     5.5     Catalog     -55 to 125    
ISO7720 Order now No     2     2/0     5000
100     0.95     1.5     10.7     High
2.25     5.5     Catalog     -55 to 125    
ISO7721B Order now No     2     1/1     5000     7800     100     1     1.6     10.7     High
2.25     5.5     Catalog     -55 to 125