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Ultra-low power two-channel digital isolator


Package | PIN: SOIC (D) | 8
Temp: M (-55 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.50
10-24 $2.25
25-99 $2.10
100-249 $1.84
250-499 $1.72
500-749 $1.46
750-999 $1.24
1000+ $1.18


  • Ultra-low power consumption
    • 4.8 µA per channel quiescent current (3.3 V)
    • 15 µA perchannel at 100 kbps (3.3 V)
    • 120 µA per channel at 1 Mbps (3.3V)
  • Robust isolation barrier
    • >100-year projected lifetime
    • 3000VRMS isolation rating
    • ±100 kV/µs typicalCMTI
  • 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 isolationbarrier
    • Very lowemissions
  • Safety-related certifications (planned):
    • UL 1577 Component Recognition Program
    • DIN V VDE V 0884-11
    • CQC, TUV and CSA certifications

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Texas Instruments  XISO7021DR

The ISO7021 device is an ultra-low power, multichanneldigital isolator that can be used to isolate CMOS or LVCMOS digital I/Os. Each isolation channelhas a logic input and output buffer separated by a double capacitive silicon dioxide(SiO2) insulation barrier. Innovative edge based architecture combined withan ON-OFF keying modulation scheme allows these isolators to consume very-low power while meeting3000-VRMS isolation rating per UL1577. The per channel dynamic currentconsumption of the device is under 120 µA/Mbps and the per channelstatic current consumption is 4.8µA at 3.3 V, allowing for use of theISO7021 in both power and thermal constrained system designs.

The device can operate as low as 1.71 V, as high as5.5 V, and is fully functional with different supply voltages on each side of isolation barrier.The two-channel isolator comes in a narrow body8-SOIC package with one forward and one reverse-direction channel in a 8-SOIC package. The device has default output high and lowoptions. If the input power or signal is lost, default output is high for the ISO7021 device without thesuffix F and low for the ISO7021F device with the F suffix. See theDevice Functional Modes section for moreinformation.