• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 15 subscribers
  • Views 132 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ISO1640: Is it possible operate on VCC2 is 1.8V?

David Kim2
Expert 2275 points
Part Number: ISO1640

Hi

VCC2 voltage went down due to changes in customer specifications.

Is i2c communication possible with the following specifications?

VCC1=5V / VCC2=1.8V

If it doesn't work, is there any part available on VCC2=1.8V?

Thanks

  • 0
    TI__Mastermind 49445 points

    Hi David,

    Thanks for reaching out and for your interest in ISO1640.
    Unfortunately, ISO1640 doesn't support 1.8V operation either at VCC1 or VCC2. Hence, ISO1640 cannot be used with VCC2 = 1.8V.

    We do not have any other I2C isolator that supports 1.8V operation. An alternative to this would be to use a bidirectional level translator between the ISO1640 and 1.8V device. For bidirectional level translator suggestion, please post this question on the Logic forum (link below) and mention an example TI level translator to auto send a notification the right team. Thanks.

    https://e2e.ti.com/support/logic-group/logic/f/logic-forum


    Regards,
    Koteshwar Rao