Supply range and temperature grade
The SN74AHC138D: Operating from 2V to 5.5V, this part bridges 3.3V and 5V logic domains without a separate level translator. The -40°C to 85°C industrial temperature range covers most factory-floor and outdoor enclosure environments, though not extended automotive under-hood duty. The single-supply architecture simplifies board layout — no dual rails or sequencing required. Outputs source or sink 8mA, sufficient to drive a standard CMOS load or a low-power LED indicator through a series resistor.
Package and footprint fit
Housed in a 16-SOIC (0.154" body width, 3.90mm), the SN74AHC138D uses the same land pattern as the industry-standard SOIC-16. The 1.27mm pin pitch is routable on a two-layer board without micro-vias, and the package is compatible with reflow profiles typical for lead-free assemblies.
Sourcing and compliance
Texas Instruments lists this device as Active with ROHS3 compliance.