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ISO7740: Replace ADuM1410BRWZ

Chen Alex1
Genius 3665 points
Part Number: ISO7740

HI Sir

May I know the ISO7740FDWR IS P2P ADuM1410BRWZ?

I saw the pIN 7 define is different between twice?

thanks

  • 0
    TI__Genius 17275 points

    Hi Chen,

    Thank you for your question.

    As you have mentioned, pin 7 and pin 10 are different, which is the disable and control 2 pin respectively. For compatibility, please consider the question below:

    Is the CTRL2 pin at HIGH state?

    • If yes, then the ISO7740FDWR can be used
    • If CTRL2 pin is LOW state, then our part is not compatible

    If this is still a bit confusing, you can send a schematic for us to review in order to ensure compatibility.

    Regards,
    Aaditya Vittal

  • 0 in reply to Aaditya V.
    Genius 3665 points

    hi sir

    updated for you, can replace it directly?

    thanks

  • 0 in reply to Chen Alex1
    TI__Genius 17275 points

    Hi Chen, 

    Thank you for your reply and for sending the schematic. 

    From the schematic you have sent, it looks like the disable (pin 7) and CTRL2 (pin 10) are pulled down to GND, which makes the default state of the device LOW.

    Unfortunately, this configuration is not compatible for pin to pin replacement with the ISO7740F device. In order to use the ISO7740F device, you can leave pin 7 open and make pin 10 pulled up to VCC, which enables the output on the ISO7740F device.

    Regards,
    Aaditya Vittal

  • 0 in reply to Aaditya V.
    Genius 3665 points

    HI Aaditya Vittal

    Other TI solution?

    how about ISO67XX?

  • 0 in reply to Chen Alex1
    TI__Genius 17275 points

    Hi Chen, 

    Thank you for your additional question.

    The ISO67xx family of devices would also have the same requirement as I mentioned for the ISO77xx devices as well. There would have to be a slight change to the pinout in order for the devices to work pin to pin, as shown below:

    Aaditya V. said:
    In order to use the ISO7740F device, you can leave pin 7 open and make pin 10 pulled up to VCC, which enables the output on the ISO7740F device

    Regards,
    Aaditya Vittal