What happens if overvoltage is given to the Vdd of PSoC?

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NaMo_1534561
Level 5
Level 5
Distributor - Macnica (Japan)
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Hello,

What happens if overvoltage is given to the Vdd of PSoC?

Generally, I think there is a short circuit between VDD and GND, but customers are asking me to investigate whether the overvoltage applied to Vdd can appear on the output port and damage the peripheral circuitry.


MPN CY8C4025AXI-S412

Best Regards,

Naoaki Morimoto

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Naoaki-san,

I'm afraid you misunderstood my description.

The overvoltage condition I mentioned is on the IO pin with respect to VDD or VSS.

Therefore the protection diode could be damaged as I described in the "IO-VDD and IO-Vss" case.

If you are talking about Overvoltage on the VDD of the IC you would see more significant failures.  Possibly VDD-VSS shorts on one or more pins along with other internal failures.  In this case,  either the CPU would stop working or if working it would draw excessive current in active or sleep modes.

Len
"Engineering is an Art. The Art of Compromise."

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