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SN74LVC1G373: VIL condition of LE pin?

Lee, Sam
Expert 6065 points
Part Number: SN74LVC1G373

Hi team,

 

Can you please reply to the following question?

 

SN74LVC1G373’s datasheet specifies VIL=0.8V at Vcc=3.3V. However, in customer's test, the latch seems disabled when LE pin falls around 1.4V.

So, is it correct for the output to act as Low, when LE pin becoms 1.4V,?

Thanks.

Best Regards,

Sam Lee

  • 0
    Guru 317370 points

    VIL ≤ 0.8 V means that the input state is guaranteed to be seen as low when the voltage is at least that low.
    Similarly, VIH ≥ 2 V means that the input state is guaranteed to be seen as high when the voltage is at least that high.

    For any voltage in between, the state of the input is undefined. In other words, the actual threshold might be anywhere between VIL and VIH.
    (Also see footnote 1.)