DM74155N, DM74156N, SN74157N 16 PIN DIP PACKAGE DECODER/MULTIPLEXER SN74156N, SN74156N, ITT74157N IC
DM74155N dual 2-to-4 line decoder/demultiplexer, inverting outputs
DM74156N dual 2-to-4 line decoder/demultiplexer, inverting outputs open-collector
SN74157N quad 2-line to 1-line data selector/multiplexer, non-inverting outputs

