S32K146 overvoltage threshold which will damage MCU

[yin_hua]

Hi NXP,

I'm working with MCU S32K146,  I want to understand the MCU over voltage effect of S32K146. Please help to clarify the following questions:

1. From datasheet, if the Vdd supply voltage is between [5.5V, 5.8V], MCU can operate with no restrictions for 60s lifetime, does this mean within 60s lifetime, the safety mechanism of MCU can still work?

2. Above 5.8V but before MCU damage, MCU software can't operate properly which is the critical failure mode for my application. MCU damage is system safe state for my application. Therefore, could NPX provide the over-voltage threshold which will definitely damage the MCU within 300ms (FTTI of my application), then I can evaluate the dangerous over-voltage range for my application.

Thanks for your support.

[oscar_hinojosa]

Hello,

Here are the answers to your questions:

1. Definitely. A continuous operation voltage for a VDD/VDDA/VREFH between 5.5V and 5.8V is not recommended. As mentioned in the DS the functionality/operation, and the lifetime is limited and reduced. See Table 2 -Note3 in the Datasheet
2. NXP DOES NOT assure the MCU functionality if the customer exceeds the normal operating parameters, and does not follow our recommendations in our DS and HWDG.

 We must recommend to the customer operates the MCU within the normal operation levels indicated in the DS. See Table 3 in the Datasheet

Best regards,

Oscar Hinojosa.

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