4 Pin Failure Mode Analysis (Pin FMA)

This section provides a Failure Mode Analysis (FMA) for the pins of the TVS1401. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

• Pin short-circuited to Ground (see Table 4-2)
• Pin open-circuited (see Table 4-3)
• Pin short-circuited to an adjacent pin (see Table 4-4)

Table 4-2 through Table 4-4 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.

Figure 4-1 shows the TVS1401 pin diagram. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the TVS1401 data sheet.

Figure 4-1 Pin Diagram

Following are the assumptions of use and the device configuration assumed for the pin FMA in this section:

• The DC signal on the protected line does not go above 14 V.

• All other pins are connected properly for each case.

• The slew rate of the signal on the protected line is below the specified limits according to the data sheet.