Best place I've found for data sheets: http://www.datasheets.com/search/index.jsp
Shows you a PDF of the datasheet. Hover at bottom right and you have a choice to download.
Google datasheet search now returns 50 wannabe sellers who sometimes don't even HAVE the datasheet. No baloney at datasheets.com, but you CAN look at inventory and prices at Mouser, Digikey etc.
You have to sign up, but no SPAM from all over...
Regards, Terry King ...On the Mediterranean in Italy
with any chip or sensor you are interested in, download the datasheet and study it. They may not make a lot of sense at first but at least they can help you ask the right questions.
here is some more info on logic gates:
hello BotFIN, that's a great ic for beam robot, specially walkers, with no pragraming whatsoever!!
here's a great link to make a cool robot using 74hc..... :
Ehh… 74HC14 is a Hex inverting Schmitt trigger and not a microcontroller.