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CD4049UB: hand rework issues

Luis Lopes
Prodigy 20 points
Part Number: CD4049UB

Hello all, 

Related to assembly conditions for components such as CD4049UB , LM358DR, UC3526DW, CD4011BM, LM7805MPX/NOPB,

I work at a assembly company and one of our clients from medical area is critizing the fact of rework on those components mencioned above.

The fact is that those components were mounted in a PCB with wrong revision, and our suggestion is remove all components from one PCB and assembly them in the correct one, following IPC 7711/7722 guidelines.

Regarding this, I want to know from T.I. if the hand rework for remove and replace this components will compromise the integrity of semiconductors.

If there is any technical article that contemplates any implications of rework of T.I semiconductors, please let me know.

CD4013BM
  • 0
    TI__Expert 3450 points

    Hi Luis,

    TI has published an application report on general handling and process recommendations for ICs, which has recommendations for maximum IC body temperature, storage conditions, and rework/repair. Repair or re-assembly will increase the risk of board failure and we cannot make any guarantee, however, TI semiconductors should remain intact if proper care is taken in storage, heating and cooling, moisture control, etc. during rework. 

    regards,

    Gabriel