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L293: Marking

Roberto Pedrazzoli
Prodigy 10 points
Part Number: L293

Hi,
where can obtain informations about valid marking of the chip L293NE 75CE71M ?
The board is assembled externally and I supect a countrefeit because about 3% of mounted chips are not working and the logo and fonts are differents from the past.
The main defect is like a short between one (or more) inputs and 0V or the power supply.
Replacing the driver make the board working good, so others parts and pcb are ok.
Our standard production requires about 900 drivers/month and we don't have never see this problem.
Thanks

  • 0
    TI__Guru** 114905 points
    Hi Roberto,

    We are investigating and should have a response by Monday.
  • 0 in reply to Rick Duncan
    TI__Guru** 114905 points
    Hi Roberto,

    Sorry, I forgot to ask if you know where the L293NE devices were purchased?
  • 0
    TI__Prodigy 330 points
    In order for TI to begin the verification process all of the following information is required. Please review and provide the required information to ti-counterfeit@list.ti.com.
    Required information
    2) High quality pictures of the bottom & top of the device(s)
    3) High quality pictures of the 2D bar code labels.
    4) Copies/pictures of shipping documents, i.e. packing slip showing the origin of the devices to TI. (If this information cannot be provided we are unable to provide verification due to uncertainties regarding chain of custody of the products.)
    5) Provide device application.
    Once the required information is provided and submitted, your request will be reviewed for verification.
     Important Note: The attachment size limit for the group address (ti-counterfeit@list.ti.com) is 1MB. Email lisam@ti.com, and j-davenport@ti.com if your attachments are larger than 1MB.

     TI strongly encourages you to purchase all your TI parts either directly from TI or from authorized TI distributors (focus.ti.com/.../distribcountryresults.jhtml) and not from the gray market or brokers.
  • 0 in reply to Jim Davenport
    TI__Guru** 114905 points

    Hi Roberto,

    Since Jim has responded with instructions, this post will be closed. If you require more information, you can reply to the post. If the post is locked, please select "Ask a related question" at the top right of the post.

  • 0 in reply to Rick Duncan
    TI__Prodigy 330 points

    Roberto,

    Fir any further questions please respond to the counterfeit distribution list in the previous post.