1-of-8 decode in a 16-SOIC footprint
The SN74LV138ATD: This is a single 3-to-8 line decoder/demultiplexer — three address inputs select one of eight active-low outputs, the standard building block for memory-mapped I/O expansion, address decoding, or demultiplexing a data stream onto eight separate lines. The 16-SOIC package (0.154-inch body width) fits a compact PCB layout; the 1.27 mm pin pitch is routable on two-layer boards without via congestion under the part.
Industrial temperature grade and compliance
ROHS3 compliant — no lead, mercury, cadmium, or other restricted substances; the part is accepted across EU, UK, and most Asia-Pacific markets without exemption paperwork.