74LS240N IC 20 pin DIP plastic package

Octal 3-STATE Buffer/Line Driver/Line Receiver - 74LS240N Integrated Circuit, 20 pin Dual Inline Package (plastic).

Datasheet

These are new old stock from our very old parts bins.  All tested good on a Minipro TL866CS eprom programmer with CMOS/TTL chip testing capabilities. See the pics below.