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ISO7740: Enable propagation delay

Takeshi Sasaki
Expert 4480 points
Part Number: ISO7740

Hi team,

Could you tell me why tpzh, tpzl has micro or nano second difference depending on having F suffix? Does it cause it by default output? Thank you for your support.

Best regards,

Takeshi Sasaki

  • 0
    TI__Expert 6195 points

    Hi Takeshi Sasaki,

    Yes this has to do with the default output. Non-F devices have a default state of HIGH and F devices have a default state of LOW. So when considering the enable propagation delay we need to consider if we are going from disabled to default state or disabled to non-default state. That is why there is a difference for F and non-F devices.

    Best regards,

    Dan