Dear team,
I have some questions about the input threshold.
My customer uses VDD=5V, but the input voltage reaches 6.3V due to inappropriate resistors. After several tests, our device is broken. I think the root cause is that the input exceeds VDD+0.5V, because we request that '' input should not be pushed than 0.5V above VDD'' in the datasheet. But I don't know why the chip is broken when the input is 6.3V (VDD=5V). The signal pin's maximum rating should be larger than 6.3V. Because if the VDD=12V, the input can be up to 12.5V. Could you please help explain why the input is limited by VDD? When the input exceeds VDD+0.5, how is our device damaged?
Thanks & Best Regards,
Sherry