S32KのトピックRe: Output voltaje thersholds versus Source Current

Output voltaje thersholds versus Source Current

DiegoRC — Fri, 15 Jul 2022 22:14:57 GMT

Hello.

I need to know the logical digital output thresholds of the S32K1xx series, based on the current supplied for the range of VDD = 3.3V.

Already consulted the Table 17- Datasheet (S32K-DS) but they are only specified for certain currents (3mA-3.5mA to VDD = 3.3V) , as well as the Figure 8 - AN2434 that only specifies it for VDD = 5V.

Re: Output voltaje thersholds versus Source Current

davidtosenovjan — Mon, 18 Jul 2022 13:42:36 GMT

Specified Voh/Vol is min/max value when sourcing/sinking current is Ioh/Iol as specified.
V-I characteristic for logic 1 (output) can estimated by linear approximation between points and <Ioh;Voh> and <0mA ; VDD>. The same way you can estimate V-I characteristic for logic 0.

Re: Output voltaje thersholds versus Source Current

DiegoRC — Mon, 18 Jul 2022 19:44:51 GMT

Hello. Thanks for the support.

For an estimate it seems valid to me. But not for a "worst-case analysis" (as is my case).

Is it the only theoretical way to get the thresholds?

Is there no such data?

Re: Output voltaje thersholds versus Source Current

davidtosenovjan — Wed, 20 Jul 2022 11:35:45 GMT

How it is defined (i.e. minimum current at defined voltage) it is basically worst case.

You can also use IBIS model we are providing.

Re: Output voltaje thersholds versus Source Current

seanli_study — Tue, 02 Sep 2025 02:09:26 GMT

Hi David：

Does the S32K1 have the threshold data for VOL and VOH? If it depends on the sourcing/sinking current? Can VOL_max be calculated through the formula of MOS transistor's resistance * sink maximum current? Can we obtain this data?