SFFS868 April 2024 ISOM8110-Q1
4.1 ISOM811(0-3)-Q1
This section provides a failure mode analysis (FMA) for the pins of the ISOM811(0-3)-Q1. 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)
- Pin short-circuited to supply (see Table 4-5)
Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.
Table 4-1 TI Classification of Failure Effects
| Class | Failure Effects |
|---|---|
| A | Potential device damage that affects functionality. |
| B | No device damage, but loss of functionality. |
| C | No device damage, but performance degradation. |
| D | No device damage, no impact to functionality or performance. |
Figure 4-1 shows the ISOM811(0-3)-Q1 pin diagram. For a detailed description of the device pins, see the Pin Configuration and Functions section in the ISOM811x-Q1 data sheet.
Figure 4-1 ISOM811(0-3)-Q1 Pin DiagramTable 4-2 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| AN | 1 | No power to the device so output is in default state. | B |
| CAT | 2 | Normal functionality | D |
| EM | 3 | Normal functionality | D |
| COL | 4 | Output state is undetermined. | B |
Table 4-3 Pin FMA for Device Pins
Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| AN | 1 | No power to the device so output is in default state | B |
| CAT | 2 | No power to the device so output is in default state | B |
| EM | 3 | Output state is undetermined. | B |
| COL | 4 | Output state is undetermined. | B |
Table 4-4 Pin FMA for Device Pins
Short-Circuited to Adjacent Pin
| Pin Name | Pin No. | Shorted to | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|---|
| AN | 1 | CAT | No power to the device so output is in default state. | B |
| CAT | 2 | AN | No power to the device so output is in default state. | B |
| EM | 3 | COL | Output state is undetermined. | B |
| COL | 4 | EM | Output state is undetermined | B |
Table 4-5 Pin FMA for Device Pins
Short-Circuited to
supply
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| AN | 1 | If the supply voltage is greater than VF, the device gets damaged with not current limiting resistor | A |
| CAT | 2 | No power to the device so output is in default state. | B |
| EM | 3 | Output state is undetermined. | B |
| COL | 4 | Output state is undetermined. | B |