• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 2 answers
  • Subscribers 15 subscribers
  • Views 1496 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.

is there any competitive isolated I2C to NSI8100N?

Aki Li
Genius 9335 points
Other Parts Discussed in Thread: ISO1540, ISO1541

Customer is looking for a replacement for NSI8100N? Could you help check it? Thank you.

  • 0
    Guru 294400 points

    The NSi8100N is a P2P clone of the ISO1540.

  • 0
    TI__Genius 17100 points

    Hi Aki,

    Yes the ISO1540 and ISO1541 are TI’s isolated I2C solutions and can be pin-to-pin replacements for NSI8100N.

    Additionally a discrete solution can be built using ISO77xx devices depending on customer’s isolation requirements.

    Are these solutions acceptable? Please let us know.

    Thank you for your post,

    Manuel Chavez

  • 0 in reply to Manuel Chavez
    TI__Genius 9335 points

    Hi Manuel ,

    Thank you for the information. Could you help give more details on ISO77XX for this application? They are using NSI8100N on PMBus. 

  • 0 in reply to Aki Li
    Guru 294400 points

    Using a ISO77xx would require additional components (i.e., a redesigned board). If you use it to reduce costs, then you could just as well use optocouplers, where the diode inputs make it easier to separate the two unidirectional paths.

    source: Vishay application note 04: Optical Isolator for I²C Bus System

  • 0 in reply to Aki Li
    TI__Genius 17100 points

    Hi Aki,

    I apologize for the delay in this response. ISO77xx in this application would be preferable over ISO154x in applications where >2.5kVrms isolation voltage is required.

    ISO77xx would not provide a pin-to-pin compatible solution and does require external components as shown in the White Paper linked here and in the schematic below:


    Both of these solutions are compatible with PMBus.


    Thank you,
    Manuel Chavez