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ULN2003LV Vin(ON) @ 320uA

pawan kumar3
Prodigy 110 points
Other Parts Discussed in Thread: ULN2003LV

Hi,

I would like to know what the Minimum ON Voltage would be when ULN2003LV is pulled up to 3.3V through a 10K resistor.

Datasheet specifies that The Von(min) is 1.65V when V(pull up)=3.3V and R(pull-up) =1K.

When the current is reduced by a factor of 10, would there be any change in the Von(Min). If yes, what would the voltage be?

Any help would be appreciated.



Pawan

  • 0
    TI__Guru*** 140026 points
    Pawan,

    There would be a small reduction in the minimum VIH but I don't have data currently available.
    Do you need a lower VIH requirement? Please state why?
  • 0 in reply to Ron Michallick
    Prodigy 110 points

    Thanks for tour reply Ron.

    I would be having another circuit driving this inverter. The High signal there would be as low as 2.3V. So, if this VIH is going to increase in any case, it would fail the design.

    Increasing the pullup resistance would reduce the burden on power supply feeding these IC's as there are many such lines.

    If increasing the pullup resistor is not going to increase VIH level, it would'nt be a problem for me.

    Also, is there a similar part with 8 inverters in a package? (Similar specs : VIH and low VOL, 0.6V max.) Please suggest.

    Your suggestion would be helpful to me.

    Pawan

  • 0 in reply to pawan kumar3
    TI__Guru*** 140026 points
    Pawan,

    The minimum VOH of 2.3V is 650mV beyond (design margin) the ULN2003LV input VIH that includes temperature and device variance.

    The output is low voltage and low current. Would an 8 channel logic device be a good fit?