Device identity and sourcing posture
Note that this part is RoHS non-compliant, which means it contains lead in the solder finish. For designs requiring RoHS conformance, a lead-free variant from the same logic family would be needed — the 74FCT564APC is specified for legacy BOMs or high-reliability applications where tin whisker risk from lead-free finishes is a concern.
Lifecycle and supply chain
Because it is RoHS non-compliant, some distributors may carry limited stock compared to lead-free equivalents. The Bulk package means it ships in tubes or trays rather than reels — a detail to confirm with the supplier if the pick-and-place feeder setup expects tape.
Cross-reference and second-source fit
For a BOM that requires a functional equivalent, the best approach is to compare the datasheet timing parameters (propagation delay, output skew) within the same FCT family rather than jumping to a different logic series.