3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for SN74AXC4T245-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.

Table 3-1 Die Failure Modes and Distribution

Die Failure Modes	Failure Mode Distribution (%)
Driver HIZ no output	18%
Output functional – out of specification timing or voltage	27%
Driver stuck at fault high	21%
Driver stuck at fault low	24%
Driver stuck at undetermined state	10%