| Author |
Message |
Ogre
Guest
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 Posted:
Mon Feb 14, 2005 11:02 pm Post subject:
Logic Chips |
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Hi
I'm trying to build a circuit involving the 74AC04 Hex Inverter, but
can't find any. I've found 74LS04 and 74HC04, but unsure which closest
matches the AC. Any help appreciated!
Ogre
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Tim Wescott
Guest
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| Posted:
Tue Feb 15, 2005 12:16 am Post subject:
Re: Logic Chips |
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Ogre wrote:
| Quote: | Hi
I'm trying to build a circuit involving the 74AC04 Hex Inverter, but
can't find any. I've found 74LS04 and 74HC04, but unsure which closest
matches the AC. Any help appreciated!
Ogre
Look for the 74ACT, also. The 74AC is faster than the 74HC and 74LS -- |
if it needs to be blazingly fast you may need a 74AS. Look at your
application, look at data sheets, see if proposed substitutes are fast
enough.
Digi-Key has them in stock, if you're in the US.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com |
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Chris Carlen
Guest
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| Posted:
Tue Feb 15, 2005 12:26 am Post subject:
Re: Logic Chips |
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Ogre wrote:
| Quote: | Hi
I'm trying to build a circuit involving the 74AC04 Hex Inverter, but
can't find any. I've found 74LS04 and 74HC04, but unsure which closest
matches the AC. Any help appreciated!
Ogre
|
Why 74AC04? They are evil fast. But if that's what you need...
http://www.digikey.com
has them in all shapes, sizes, and manufacturers.
Consider also the AHC family. A little tamer.
Good day!
--
_______________________________________________________________________
Christopher R. Carlen
Principal Laser/Optical Technologist
Sandia National Laboratories CA USA
crcarle@sandia.gov -- NOTE: Remove "BOGUS" from email address to reply.
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Ken Smith
Guest
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| Posted:
Tue Feb 15, 2005 2:49 pm Post subject:
Re: Logic Chips |
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In article <cuqqg60nru@news3.newsguy.com>,
Chris Carlen <crcarle@BOGUS.sandia.gov> wrote:
| Quote: | Ogre wrote:
Hi
I'm trying to build a circuit involving the 74AC04 Hex Inverter, but
can't find any. I've found 74LS04 and 74HC04, but unsure which closest
matches the AC. Any help appreciated!
Ogre
Why 74AC04? They are evil fast. But if that's what you need...
http://www.digikey.com
has them in all shapes, sizes, and manufacturers.
Consider also the AHC family. A little tamer.
|
AHC has a lower drive current. Than the AC and ACT parts.
If you don't need the speed and the drive I'd suggest you try not to
design AC parts in. It looks like they may be on the fade. Fairchild's
web site no longer has a direct link to them in the logic page and shows
them as "mature". "Mature" is what makers call a product when they've
lost interest in it but will still sell it as long as it makes money.
BTW: I'd really like ACT speed in an unbuffereed ACT04. Has anyone seen
one?
--
--
kensmith@rahul.net forging knowledge |
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Rich Grise
Guest
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| Posted:
Wed Feb 16, 2005 2:28 am Post subject:
Re: Logic Chips |
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On Tue, 15 Feb 2005 14:49:32 +0000, Ken Smith wrote:
| Quote: | In article <cuqqg60nru@news3.newsguy.com>,
Chris Carlen <crcarle@BOGUS.sandia.gov> wrote:
Ogre wrote:
Hi
I'm trying to build a circuit involving the 74AC04 Hex Inverter, but
can't find any. I've found 74LS04 and 74HC04, but unsure which closest
matches the AC. Any help appreciated!
Ogre
Why 74AC04? They are evil fast. But if that's what you need...
http://www.digikey.com
has them in all shapes, sizes, and manufacturers.
Consider also the AHC family. A little tamer.
AHC has a lower drive current. Than the AC and ACT parts.
If you don't need the speed and the drive I'd suggest you try not to
design AC parts in. It looks like they may be on the fade. Fairchild's
web site no longer has a direct link to them in the logic page and shows
them as "mature". "Mature" is what makers call a product when they've
lost interest in it but will still sell it as long as it makes money.
BTW: I'd really like ACT speed in an unbuffereed ACT04. Has anyone seen
one?
|
I don't think there can be such a thing as an "unbuffered" ACT chip. The
"T" means "TTL compatible", which is most definitely _not_ unbuffered!
Now, ACU would be something to see! Although, there might be HCU chips.
Good Luck!
Rich |
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