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Original question:

TCA9803: Quiescent current consumption when EN=0 and when VCCA or VCCB=0

TCA9803: TCA9803 VOL level when input is not 0V

SYLVAIN BOURIOT
Intellectual 440 points
Part Number: TCA9803

Tool/software:

Hello,

In TCA9803 datasheet, VOL  (Low-level output voltage) is only specified when the input is 0V:

-> Low-level output voltage (VOL)  of SDAA and SCLA   are specified for VILB =0V.

-> Low-level output voltage (VOL) of  SDAB and SCLB are specified for VIA =0V.

Does the Low-level output voltage (VOL)  of SDAA and SCLA increase, if VILB is not 0V but 0.3V (for example)?

Does the Low-level output voltage (VOL)  of  SDAB and SCLB  VOL increase, if VIA is not 0V but 0.3V (for example)?

Best Regards

Sylvain

  • 0
    TI__Mastermind 48108 points

    Hi Sylvain,

    A VIA or VIB that is slightly greater than 0V (say 0.3V as you said) should not affect the drive strength of the output voltage. The output voltage varies based off process variation, loading conditions, and temperature. 

    As long as a VIA / VIB is indeed a valid low logic input, then a low logic output with the following output characteristics would occur. 

    Regards,

    Tyler