• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 50 subscribers
  • Views 291 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.

OPA549: OPA549S convert to OPA549T

Patrick Rossiter
Prodigy 40 points
Part Number: OPA549

Hi there,

I have a PCB which is designed for the OPA549T, but I can't get this component anymore. Has anyone had any issues bending the legs of the OPA549S to fit the OPA549T footprint?

Thanks in advance,

Patrick

  • 0
    Guru 140200 points

    Hi Patrick,

    I hope you don't need to bend too many of these OPAmp? In any case I would take pliers with rounded edges.

    Kai

  • +1
    TI__Genius 12955 points

    Hi Patrick,

    This can be done for a quick evaluation but as you can imagine is not recommended for a long-term manufacturing solution.  The main risk is that the stress on the leads can create gaps between the pins and the mold compound, which then can lead to delamination.  Delamination can result in many different performance problems associated with moisture building on the die.  This likely won't show any problems in a bench eval., it would take time to develop.

     Regards,

    Mike

  • 0
    TI__Guru* 93105 points

    Patrick,

    I have bent leads on 3-pin TO-220 packages but never tried it with an 11-pin, closed space (1.7 mm) TO-220 package like the OPA549 uses. I believe it would be very difficult to form the pins accurately. 

    In the past we have had customers who have needed custom lead formation of the KV (7-pin) and KVC (11-pin) packages for their particular and unique lead arrangements. Although I have not dealt with any of the companies that offer custom semiconductor lead forming these services appear to be available. If you have many OPA549 devices that require the lead forming having one of the companies do the work would likely provide the best results.

    Regards, Thomas

    Precision Amplifiers Applications Engineering