TI still has in incredible number of 7400 and 74LS parts in production

I didn't realize this until now when I was poking around with a Digikey parametric search, but the number of early 70's parts that TI still actively produces is pretty incredible:

http://www.digikey.com/product-search/en?FV=ffec004c http://www.digikey.com/product-search/en?FV=ffec004d

Example active parts pages:

http://www.ti.com/product/SN7400 http://www.ti.com/product/SN74LS00

What an incredible commitment from TI. Where do you think these are still being used other than in hobbyists' basements?

It’s a conspiracy. TI develops the Patriot and Hawk missile systems using '70s technology, sells that entire business unit to Raytheon for a large chunk of money, then provides military grade chips to Raytheon so they can continue development and production. The normal grade chips you and I would buy are the castoffs.

(Dons his tin foil hat and saunters off into the sunset.)

Hi, used in still running industrial control systems, were in the space shuttle. Even in new units being produced now, SMD gates and buffers.

Tom...... :)

ISTR there being a reason for them being preferred in industrial environments. cant remember what though

TomGeorge:
Hi, used in still running industrial control systems, were in the space shuttle.
Even in new units being produced now, SMD gates and buffers.

Tom… :slight_smile:

You look through the list and almost all of those are still available in DIP as well. Almost all of the ICs at reasonable prices too.

JoeN: You look through the list and almost all of those are still available in DIP as well. Almost all of the ICs at reasonable prices too.

After such a long production run, I'd guess that most of the production glitches have been eliminated (so there are few waste or faulty units) and that they've fully recovered the development and start-up costs on them. They can, therefore, afford to sell them cheaply and [u]still[/u] make a handsome profit.