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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
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3-1(3) Signal polarity (i.e., whether the signal voltage crosses the GND potential like an analog signal)
It is necessary to select either unidirectional or bidirectional ESD protection diodes, considering the polarity of signal lines to be protected. Different types of diodes are used for unmodulated digital signals that swing only in the positive direction (e.g., between 0 V (logic Low) and 5 V (logic High)) and unbiased analog signals whose voltage can be positive and negative. Bidirectional ESD protection diodes should be used for signals that range above and below GND as shown below. (Both unidirectional and bidirectional diodes can be used for signals whose voltage can only be positive or negative.)