SFFS756 November 2023 SN74HCS20-Q1
The failure mode distribution estimation for SN74HCS20-Q1 in Table 3-1 comes from the combination of common failure modes listed in standards such as IEC 61508 and ISO 26262, the ratio of sub-circuit function size and complexity and from best engineering judgment.
The failure modes listed in this section reflect random failure events and do not include failures due to misuse or overstress.
| Die Failure Modes | Failure Mode Distribution (%) |
|---|---|
| Output stuck-at fault | 30% |
| Output open (HIZ) | 25% |
| Output functional – out of specification timing or voltage | 45% |