Last updated on July 18th, 2017 at 10:05 pmBinary decoder Binary decoder has n-bit input lines and 2 power n output lines. It can be 2-to-4, 3-to-8 and 4-to-16 line configurations. Binary decoder can be easily constructed using basic logic gates. VHDL Code of 2 to 4 decoder can be easily implemented with structural and behavioral modelling.