The 74HC157D comes in a 16-SOIC package (0.154" body width, 3.90 mm) — a standard footprint that places without tombstoning risk on a typical 1.6 mm PCB. The 1.27 mm pitch gives the assembler room to route a single trace between pads on a two-layer board. MSL is not explicitly stated in the record, but for a standard SOIC in a 74HC family, the typical rating is MSL 1 — no bake required before reflow if the bag seal is intact. Check the reel label to be sure.
Logic-level and supply rails
The 5.2 mA output drive (both high and low) is enough to fan out to four standard 74HC inputs but not to drive a long backplane trace or a relay coil — plan a buffer if the load exceeds the rated current. If the ambient around the part exceeds 85°C, the 74HC family's propagation delay and output current derate — the datasheet's derating curve is the reference.
No stock-holding claim is made; quantities are lot-specific and verified per order.