Active production, RoHS non-compliant
The 54AC157DM: It is marked RoHS non-compliant, so it is not exempt from the RoHS directive — confirm your assembly's exemption status before committing the BOM line.
Quad 2-input multiplexer, AC series
The 54AC157DM is a quad 2-input multiplexer from the AC series. It selects one of two data sources per channel and routes the chosen input to the output, controlled by a common select line. Supplied in Bulk packaging — loose units, not tape-and-reel, so it suits bench-level prototyping or low-volume production where reel feeding is not needed.