Active production — 20-bit bus register with 150 MHz clock ceiling
The SN74ALVCH16721DL: That 4.3 ns sets the timing budget for the downstream latch or bus — the data must be stable at the receiver's setup window before the next clock edge arrives.
Parametric fit — supply range, drive, and temperature grade
Output drive is 24 mA source and sink at the rated voltage — enough to drive a 50-ohm backplane trace or a bank of LED indicators directly. Input capacitance is 3.5 pF per pin, and quiescent current is 40 µA typ — negligible in a powered system but relevant for battery-backed domains. The 56-BSSOP package (7.50 mm body width) with 0.65 mm pitch is a common SSOP footprint. The supplier device package is 56-SSOP — same mechanical outline. Board layout matches the JEDEC MO-118 variation; no special via-in-pad or thermal relief is required for this logic-level part.
Sourcing posture and compliance documentation
Compliance documentation includes the ROHS3 declaration and the standard TI material composition data. No UL, IEC, or AEC-Q automotive qualification is cited for this part — it is a commercial/industrial-grade logic device, not automotive-rated.