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ISO7321C: Different voltage supply on ISO7321

Part Number: ISO7321C
Other Parts Discussed in Thread: ISO7841

Hi Expert,

Can ISO7321/ISO7841 work under we provide 5V supply to VCC1 and 3.3V to VCCO?

Best regards,

Eric Lai


Field Application Engineer

Texas Instruments Taiwan Limited

O: +886-2-2175-2582

M: +886-909-262-582


  • Hi Eric,

    Yes, ISO7321, ISO7841 & most other digital isolators at TI can operate at 5V VCC1 & 3.3V VCC2. Please note that VCC1 and VCC2 supply voltages can independently be supplied with any voltage in their operating voltage. For ISO78xx & ISO77xx, VCC1 & VCC2 can be anywhere between 2.25V & 5.5V independently. Thanks.

    Koteshwar Rao