What the AEC-Q100 grade means for a BOM line
The 74HC166D-Q100118 is an 8-bit parallel-in serial-out shift register from the 74HC family, qualified to AEC-Q100 (Automotive, AEC-Q100, 74HC series).
Housed in a 16-SOIC (0.154", 3.90mm width) package with a 16-SO supplier device package designation. The 1.27 mm pitch is a standard SOIC footprint — no fine-pitch reflow profile required, and a two-layer board with basic hand-solder rework can handle it. Supplied in Bulk packaging, so the parts arrive in tubes or trays rather than tape-and-reel — factor that into your pick-and-place feeder setup if the line expects reels.