2.2 Current Injection Stress

When stressing products the goal is to stress in every combination of input bias conditions and subsequent output conditions that can be achieved without disrupting the stability of the product. To start, one needs to place the product into a known, stable state that has a reproducible INOM. With inputs high, all of the pins held high are exposed to a positive polarity current pulse. Any pins required to be low for product stability are not stressed. The inputs that can switch to low are then pulsed with a negative pulse and any pin held high for stability is not stressed. There may be pins held high or low for stability that cannot tolerate a current pulse. Outputs depending on the output condition will have a pulsed current of the same polarity. The high-Z condition is preferred, if possible, since it gives the opportunity to stress it with both positive and negative pulses. Bi-directional pins will need to be configured in a specific state and then stressed appropriately.