Hello,

I've been searching for some 7400-series replacement ICs on the web. I can find a couple of them on one website and a few more on another, but buying them that way means high shipping costs. Some of the sites have what are apparently mongrel brands.
Anyone know of a company that has a decent inventory of branded 74XX ICs?

Thanks.

 

Gee, can you give even one part number? My search engines don't do, "74xx" very well.
CMOS chips?

Maybe Mouser, Jameco, Digikey.

 

7400 series ICs are probably past their best use date.
Try looking for 74LSxxx or 74ALSxxx for alternatives.
Even 74HCT might work for you depending on specific application.

Avoid mixing series.

 

Hello,

I've been searching for some 7400-series replacement ICs on the web. I can find a couple of them on one website and a few more on another, but buying them that way means high shipping costs. Some of the sites have what are apparently mongrel brands.
Anyone know of a company that has a decent inventory of branded 74XX ICs?

Thanks.

Are you going to repair some circuit implemented with chips from the 74XX family?

 

Jameco www.jameco.com sells 7400 series IC's

 

Digikey also have a selection.
Max.

 

$ .10 ea or all $ 5.00 + US postage.
7400-7, 7402-2, 7403-9, 7401-1, 74H04-1,7404-1, 7409-2, 7430-5, 7442-2, 7416-1, 7476-3, 7485-15, 74L85-1 [ different pinout from 7485 ], 7490-1, 7492-6, 7493-8, 74L98-4, 74121-11, 74151-2.

 

Are you going to repair some circuit implemented with chips from the 74XX family?
__________________
Agustín,

I am restoring an old Heathkit IO-4105 oscilloscope. One of the five 7400-series ICs on the horizontal board is indicating bad. I was going to replace all of them, but apparently the 7400s are getting scarce, and of dubious origin. So, as MrChips has suggested, I am going to replace all of them with a newer iteration of the original chips.

Many thanks to all for your helpful responses.

 

Provide a list and quantity of what you need.
Also it would help if I saw the schematics.