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PCA9515B: VOL – VILC

Franz Figueroa32
Intellectual 2660 points
Part Number: PCA9515B

Hi E2E,

Good day!

On section 8.1 page 8 of the datasheet, it is stated that "the input voltage of each internal buffer must be 70 mV or more below the low level output when the output is driven low internally". However, on the Table 6.5 page 5, it is indicated that Low-level input voltage below low-level output voltage is typically 120mV.

May I know what is the difference between the two?

Thank you for your usual support.

Best regards,

Franz

  • 0
    TI__Guru 73991 points

    Hey Franz,

    I believe the two are referencing similar parameters. Essentially when you want to send a low into the output of this device (which is already low) you need to drive below 0.4V. VoL minimum for this device looks to be 0.47V and 70mV below that (VoL-ViLc) is 0.4V. (This makes me assume that the minimum VOL-ViLc is 70mV) while the typical is 120mV. SO ideally you should drive low to 0.38V if we use the minimum VoL and the typical VoL-ViLc.

    -Bobby

  • 0 in reply to BOBBY
    TI__Intellectual 2660 points

    Hi Bobby,

    Thank you for the explanation.

    Best regards,

    Franz