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TL16C752D: TL16C752B

Part Number: TL16C752D

Hi all

Would you mind if we ask TL16C752B?

We know that we should use TL16C752D instead of TL16C752B.
(Of course, we recommend that customer should use TL16C752D.)
However, we have some questions about TL16C752B.

<Question>
Does TL16C752B have the same problem as following URL?
http://www.ti.com/lit/er/sllz058a/sllz058a.pdf
As the back ground of this question, our customer has following failure.
-Theleast significant bit turned over.
 TL16C752B has following Errata. Hoever, it is not relation to the customer's failure. 
http://www.ti.com/lit/er/sllz049/sllz049.pdf

If you have knowleage about it, could you let us know?

Kind regards,

Hirotaka Matsumoto

  • Hey Hirotaka-San,

    "Does TL16C752B have the same problem as following URL?"

    -To my knowledge, no. When the C revision was made it was a completely different design from the B version so it would be unlikely for B to see the same issue as C (though not impossible).

    "As the back ground of this question, our customer has following failure.
    -Theleast significant bit turned over."

    -When you say the bit is turned over, are you saying the LSB is always flipped or the bit will always be 0?

    "If you have knowleage about it, could you let us know?"

    Can you tell us more about the customer set up? (Schematics would be useful)

    What are they programing into our internal registers when initializing the device? (trigger limit, clock divisor, interrupt enables, LCR, ect....)

    What data are they sending and receiving when this issue occurs? (o-scope shots would be helpful)

    How often this the bit get "turned over?" (is it repeatable?)

    Does this LSB turn over occur only on the first byte sent/received or does it happen everytime?

    Have they tried replacing B with D to see if the problem goes away?

    Thanks,

    -Bobby

  • Bobby san

    Thank you for your reply!

    -When you say the bit is turned over, are you saying the LSB is always flipped or the bit will always be 0?
    ->We are checking it, we will feedback you.

    Can you tell us more about the customer set up?(Schematics would be useful)
    What are they programing into our internal registers when initializing the device? (trigger limit, clock divisor, interrupt enables, LCR, ect....)
    What data are they sending and receiving when this issue occurs? (o-scope shots would be helpful)
    How often this the bit get "turned over?" (is it repeatable?)
    Does this LSB turn over occur only on the first byte sent/received or does it happen everytime?
    ->Thank you for your advice, at the first, we wanted to know the same problem as -C version.
       We will collect information which you mentioned.

    Have they tried replacing B with D to see if the problem goes away?
    ->We ask to our csutomer to try replacing it.

    Kind regards,

    Hirotaka Matsumoto

  • Hello Matsumoto-san,

    Have you had a chance to check with the customer for this additional information?

    Thank you,
    Max
  • Max san

    Thank you so much for your help always!
    Now, we can't get additional information from customer.
    We encouraged the customer to check the thing which your mentioned.
    If we have some update, we will ask you.

    Kind regards,

    Hirotaka Matsumoto