BCD-to-decimal decoder, 1-of-10 output
The SN74LS145DR is a 74LS-series BCD-to-decimal decoder that takes a 4-bit BCD input and asserts one of ten active-low outputs. The 1 x 4:10 configuration means a single decoder block maps four input lines to ten output lines — useful for driving numeric displays, relay banks, or multiplexing indicator lamps where you need to select one of ten states from a binary-coded input. Supply range is 4.75V to 5.25V, standard for 5V TTL logic.
16-SOIC surface-mount package and temperature grade
The 1.27mm pin pitch is layout-friendly — two-layer boards handle the fan-out without vias. The supplier device package is also 16-SOIC, so the footprint matches the standard SOIC-16 land pattern. This covers benchtop instruments, office equipment, and indoor industrial control panels.