• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 2 answers
  • Subscribers 19 subscribers
  • Views 699 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.

SN74LVT16245A: SN74LVT16245BDGGR usage issue

Eagle.Miao
Intellectual 910 points
Part Number: SN74LVT16245A
Other Parts Discussed in Thread: SN74LV4T125

There were two failures in our company's nearly 200 sets of finished products,

one of which was below 10 ohms of the Pin20 pair of ground impedance as shown in the figure,

and one of which was below 10 ohms of the PIN22 pair of ground impedance as shown in the figure.

The internal breakdown was suspected.Is there any problem with my schematic diagram? Could you please check it for me?

In addition, PWM terminal input has any good Suggestions, or reference circuit.？

thank you！

  • 0 in reply to Eagle.Miao
    TI__Genius 16725 points
    Hello,

    Yes the input of below 10 Ohms between the input and ground does seem too low. I am going to need a few more things from you to completely understand this.
    Why do you have pull down resistors on the input? Also, have you left the unused inputs of this device floating?
    Could a buffer such as the SN74LV4T125 be a better fit for you for this application?

    Thanks!
    - Karan
  • 0 in reply to Karan Kotadia
    Prodigy 20 points

    Hi Karan,

    we are the end user for this case, now I am concerning the mark on the top side, which I highlight by red in picture underneath, because it's unshowned in datasheet,

    could you please let us know what these character mean? such as "8" means year, "GS" means manufacture facility,

    thanks!

    Jerry

  • 0 in reply to jiangdong ji
    TI__Guru* 96712 points

    Hi Jerry,

    I see that you also posted this top-side marking question here.  There's no need to post the same question three times.

    Also, you didn't answer any of Karan's questions.  If you'd like our help, we will need you to work together with us.

    From your schematic, it looks like you have left 13 inputs of this device floating, which is a certain way to cause the device to draw excessive current, and could possibly destroy it. I'm sure that's why Karan asked about the floating inputs.

    You may want to read this application report for more information: Implications of Slow or Floating CMOS Inputs