If static charge is applied to a general-purpose CMOS logic, what kinds of faults are expected? What measures can be used?

If static charge is applied to a general-purpose CMOS logic, the general-purpose CMOS logic may be damaged.

Because the gate oxide film that is used for the input gate of a general-purpose CMOS logic is thin (some hundred to thousand Å),it may be electrically damaged if some hundred to thousand volts of voltage such as static charge is applied.

To prevent this, input terminals of Toshiba’s general-purpose CMOS logic are equipped with protective circuit to protect the input gate from static charge. However, it should be avoided to directly discharge electricity to the device. Even devices with protective circuits may be deteriorate or destroyed.

[Figure: External interface section: Examples of preventive measures against static charge]

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