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TLC555-Q1: Clock & timing forum

RYO
Intellectual 2000 points
Part Number: TLC555-Q1

Hi all,

I would like to know the relationship between the threshold voltage Vit and the trigger voltage Vi(trig) on TLC555-Q1. Do you have one? If Vit=2.7V and Vi(trig)=2.06V, the duty gets very small. Are there any possibilities to show such a condition?

If you have any data that show the relationship between the Vit and the Vi(trigger), or the correlation data of the resistance between each resistor, it'd be very appreciated.

Regards,
RYO

  • 0
    TI__Guru**** 165276 points

    RYO,

    The limits for these thresholds are ridiculously wide. The matching of the resistor chain is excellent across voltage and temperature and device to device. The comparators should always be less than 20mV input offset error.

    For a reasonable "worst case" variance test, give +100mV to one and -100mV to the other.