54S257DM from National Semiconductor is a MULTIPLEXER 2 LINE INPUT, TTL
SNJ54S257J from Texas Instruments is a 54S257 QUADRUPLE 2-LINE TO 1-LIN
SN54ALS251J from Texas Instruments is a 1-OF-8 DATA SELECTORS/MULTIPLEXE
{"one"=>"Select 2 to 5 items to compare", "other"=>"{{ count }} of 5 items selected"}
Select first item to compare
Select second item to compare
Select third item to compare