SN74HC139N - Decoder / Demultiplexer

Was looking for a decoder with low propagation delay for a college project, and these chips are delivering exactly that. The dual 2-to-4 layout saved me board space for two separate address lines.

Pulled the trigger on these for a memory bank expansion project, and the dual 2-to-4 decoder layout makes wiring a breeze—each channel works independently without any glitchy cross-talk.

Propagation delay on this chip is impressively short—my address decoding circuit responds instantly now. Used it to clean up a messy multiplexer setup, and the dual 2-to-4 layout saved me space on the board.