Dual decade counter in 16-SOIC — what the 35 MHz count rate buys you
The -55°C to 125°C temperature range qualifies this part for avionics, satellite payloads, downhole instrumentation, and military ground vehicles — any environment where the board sees extreme thermal cycling. The 16-SOIC package (3.90 mm body width) fits a standard surface-mount footprint, compatible with automated assembly lines.
Asynchronous reset — why it matters for state machines
The asynchronous reset on each counter element forces all outputs low without waiting for the next clock edge. In a production test jig or a fault-recovery sequence, this lets you clear the counter mid-cycle and restart from zero on the next negative edge. No clock-gating logic required — the reset pin overrides the clock.
Lifecycle and compliance
The CD74HC390M96 is listed as Active, meaning TI continues to manufacture and support the part. No last-time-buy risk for ongoing production. ROHS3 compliant — no exemptions that would require a waiver for EU or California markets.
Sourcing this part
Available through independent distribution channels. For dual-sourcing resilience, the CD74HCT390E (through-hole, 27 MHz, 4.5 V supply) is a functional alternative if the board can accommodate a DIP footprint and the lower speed.