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SN74AVCA164245 - IOH, IOL

Ryuji
Guru 20090 points
Other Parts Discussed in Thread: SN74AVCA164245

Hello,

In the datasheet of SN74AVCA164245 page 1, there is the discription as below.

"Dynamic Drive Capability Is Equivalent to Standard Outputs With IOH and IOL of ±24 mA at 2.5-V VCC"

Hoever, in the EC table on the page 5, the IOH and the IOL is +/-12mA at the condition of  2.4V to 2.7V VCCO.
Could you please let me know his reason? Which are values correct? 

Best Regards,
Ryuji Asaka

  • 0
    TI__Expert 6335 points

    Ryuji,

    I've notified the apps engineer supporting this product. They will get back to you. Thanks.

    In the meantime, I quickly looked at the datasheet. I believe the +/- 24 mA refers to dynamic current (e.g. Current that is provided when the outputs switch from high to low or from low to high), while the +/- 12 mA refers to static current (e.g. Current that is provided when the outputs is at a steady high or at a steady low).

    Also, this app note has more details.

    Best Regards,
    Nirav

  • 0 in reply to Nirav Patel
    TI__Guru 59720 points

    Hi Ryuji ,

    I agree with Nirav on this . The app note explains the DOC ; where the low impedance high drive at the beginning and higher impedance lower drive after the transition . The feature helps in overshoots and undershoots suppression without series damping resistors .

    The static drive will be smaller than the dynamic drive available initially .