What`s the VOL value of S32K3

[Devin51]

In the MWCT2xxxS series DS, there is no explicit VOL parameter. Instead, conditions like VOL <= 0.7V are provided.

1. Could you please clarify the specific typical and maximum values of VOL? We need these values to confirm the compatibility between the external circuit and the IO.
2. If the maximum value is 0.7V, it seems a bit high to control NPN OFF. Could you let us know if VOL is defined under specific conditions, such as a particular current condition?
3. In the following GPIO model, please provide the RDSON parameter. This will help us calculate VOL based on the specific use case.

[PavelL]

Hello @Devin51 ,

The row in the datasheet means: if you forced current 6mA to the pin (set as output low), the voltage on the pin will be less or equal to 0.7V. This value is the worst case for process & temperature spread.

In my opinion, driving NPN should be an issue. Depends on your embodiment, but there is usually 10k resistor in series with base - so the (base) current is in about 260uA = (3.3 - 0.7) / 10k. If you need higher base current, the series resistor will have much lower value, but still you can turn off the NPN. If you use external pull-up resistor to create base current e.g. 6mA, you need to use another NPN (or external driver) to help GPIO turn off the 1st (power) NPN.

RDSON value is not provided because is process & voltage & temperature dependent. Instead of RDSON, the IBIS model makes more sense to me. I do not see available IBIS model for this MCU on web page, so, please contact NXP sale support or NXP sales representative with your IBIS requirement.

Best regards,

Pavel