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Original question:

TLC3702: difference between REV B and REV C.

TLC3702: What is the difference between TLC3702IDR rev. B and TLC3702IDR rev. C

Luis Cahuich
Prodigy 10 points
Part Number: TLC3702

Tool/software:

Hello IT team, I hope you have a nice day.

I am wondering what is the difference between TLC3702IDR rev. B and TLC3702IDR rev. C.

The rational for this question is that we are using this IC in a frequency generator (relaxation oscillator).

When the revision C is used, we measure a lower frequency (5 to 8 Khz less) when compared to Rev B. This affects our application as it is frequency sensitive.

Is there any other change in the IC besides the die?

Thank you so much in advance.

  • 0
    Guru 279540 points

    The guaranteed datasheet parameters have not changed.

    Please show the schematic.

  • 0 in reply to Clemens Ladisch
    Prodigy 10 points

    Thank you so much for your reply.

    Unfortunately, I cannot show the schematic, as it is Emerson´s propriety.

    However, we have been manufacturing our devices using the Rev B for quite a long time by now. That changed in recent days when we started to use the Rev C and our boards started to fail our tests. Furthermore, when we change the Rev C IC for a Rev B IC, our boards work as always.

    It would be really helpful if you could share with us any insight.

    Thank you so much in advance. 

  • 0 in reply to Luis Cahuich
    TI__Guru*** 149636 points

    Luis,

    C is a little slower? C as faster would be less surprising. I don't know how much 5 to 8kHz means because I don't know the nominal frequency. TLC3702 is a low power comparator if the frequency is high enough then propagation delay become a major contributor to output frequency. It would be good to know the IN+ hysteresis amplitude. Common is 1/3 of supply. What is the supply voltage?