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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.
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3-1 Key characteristics for normal operation (in the absence of an ESD event)(3)

Figure 3.7 Unidirectional vs bidirectional polarity
Figure 3.7 Unidirectional vs bidirectional polarity

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.)

3 Key electrical characteristics of TVS diodes (ESD protection diodes)

3 Key electrical characteristics of TVS diodes (ESD protection diodes)
3-1 Key characteristics for normal operation (in the absence of an ESD event)(1)
3-1 Key characteristics for normal operation (in the absence of an ESD event)(2)
3-2 Key characteristics for protection against ESD events(1)
3-2 Key characteristics for protection against ESD events(2)
3-2 Key characteristics for protection against ESD events(3)

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