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'[EE] 7414 IC CHIP'
2010\02\21@184500 by BOB

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Does any one know of a place to buy about 10 or 20 7414 HEX SCHMITT
TRIGGER INVERTERS.  In the 14 pin DIP package.  I need them to condition
parallel port output signal for CNC  stepper motor drivers.  I have
checked MOUSER, ALLIED AND DIGIKEY.

They have a lot of surface mount stuff but are scarce to nonexistent on
the old DIP package.

BOB

2010\02\21@185322 by Dario Greggio

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BOB ha scritto:
> Does any one know of a place to buy about 10 or 20 7414 HEX SCHMITT
> TRIGGER INVERTERS.  In the 14 pin DIP package.  I need them to condition
> parallel port output signal for CNC  stepper motor drivers.  I have
> checked MOUSER, ALLIED AND DIGIKEY.

I think I have some 20 or 30 of them!
very old but working i.e. not used


--

Ciao, Dario
--
Cyberdyne

2010\02\21@191627 by Peter van Hoof

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Digikey does have the 74ls14
search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-1643-5-ND
Should work for you in 95% of cases.

Peter van Hoof



{Original Message removed}

2010\02\21@192553 by Peter van Hoof

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never mind , 0 in stock
sorry for that

 


----- Original Message ----
> From: Peter van Hoof <spam_OUTpvhoofTakeThisOuTspamyahoo.com>
> To: Microcontroller discussion list - Public. <.....piclistKILLspamspam@spam@mit.edu>
> Sent: Sun, February 21, 2010 7:16:26 PM
> Subject: Re: [EE] 7414 IC CHIP
>
> Digikey does have the
> 74ls14
search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-1643-5-ND
Should
> work for you in 95% of cases.

Peter van Hoof



-----
{Quote hidden}

TRIGGER
>
> INVERTERS.  In the 14 pin DIP package.  I need them to condition
>
>
parallel port output signal for CNC  stepper motor drivers.  I
>
> have
checked MOUSER, ALLIED AND DIGIKEY.

They have a lot of
> surface
> mount stuff but are scarce to nonexistent on
the old DIP
>
> package.

BOB

2010\02\21@193537 by Peter van Hoof

face picon face
The 74hct14 is available from Digikey as a dip
from several different manufacturers starting at $0.43 in singles
and it is in stock

The 74HCT family is a special version of 74HC with 74LS TTL-compatible inputs so 74HCT can be safely mixed with 74LS in the same system. In fact 74HCT can be used as low-power direct replacements for the older 74LS ICs in most circuits. The minor disadvantage of 74HCT is a lower immunity to noise, but this is unlikely to be a problem in most situations.

Peter van Hoof



{Original Message removed}

2010\02\21@194000 by Harold Hallikainen

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face
Jameco has them. See
http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=49437

Harol


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2010\02\21@200729 by mcd

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Newark has 'em in a bunch of flavors, no "plain" tho.

http://www.newark.com/jsp/search/browse.jsp?N=500003+1001906+5117196&Ntk=gensearch_001&Ntt=7414&Ntx=mode+matchallpartial&No=0&getResults=true&appliedparametrics=true&locale=en_US&catalogId=&prevNValues=500003+1001906&filtersHidden=false&appliedHidden=false&originalQueryURL=%2Fjsp%2Fsearch%2Fbrowse.jsp%3FN%3D500003%2B1001906%26Ntk%3Dgensearch_001%26Ntt%3D7414%26Ntx%3Dmode%2Bmatchallpartial%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_US%26catalogId%3D%26prevNValues%3D500003%2B1001906

*WOW*, heck of an URL.  Go to Newark, poke in 7414, click on logic ICs,
then select DIP package.  7 flavoer, C, ACT, H, etc. etc.

--McD



2010\02\21@201928 by Isaac Marino Bavaresco

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Em 21/2/2010 21:35, Peter van Hoof escreveu:
> The 74hct14 is available from Digikey as a dip
> from several different manufacturers starting at $0.43 in singles
> and it is in stock
>
> The 74HCT family is a special version of 74HC with 74LS TTL-compatible inputs so 74HCT can be safely mixed with 74LS in the same system. In fact 74HCT can be used as low-power direct replacements for the older 74LS ICs in most circuits. The minor disadvantage of 74HCT is a lower immunity to noise, but this is unlikely to be a problem in most situations.
>
> Peter van Hoof
>  


I think he wants the 7414 (no letters in the middle) because of its high
drive capability. The 74HCT14 output current is just 4mA. I think he
could use the 74AHCT14, which has a 24mA output current capability.

Best regards,

Isaac
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2010\02\21@203922 by Isaac Marino Bavaresco

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Em 21/2/2010 22:19, Isaac Marino Bavaresco escreveu:
{Quote hidden}

Sorry, the 74AHCT14 has 8mA output current capabality. The one with 24mA
output current capability is the 74ACT14, but it is not TTL compatible.
Does the OP need TTL levels compatibility?


Regards,

Isaac

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2010\02\21@205705 by Isaac Marino Bavaresco

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Em 21/2/2010 21:16, Peter van Hoof escreveu:
> Digikey does have the 74ls14
> search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-1643-5-ND
> Should work for you in 95% of cases.
>
> Peter van Hoof
>  

The problem with the 74LS14 (and also the no-letter 7414) is that
although it can sink up to 16mA at logic level 0, it can source less
than 1mA at logic level 1, and may not be suitable for the needs of the
OP's circuit (unless he is using PNP or P-Channel transistors after the IC).

The 74ACT14 has much higher drive capability, is not obsolete, is much
cheaper and consumes much less quiescent power. The only possible
problem is the CMOS voltage levels.


Regards,

Isaac

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2010\02\21@230125 by Forrest Christian

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I buy 74hc14n and 74hct14n's from mouser by the bucketful, on a regular
basis.

You should be able to drop in a 74hct14n or a 74ls14n without any problems.

-forrest

On 2/21/10 4:45 PM, BOB wrote:
{Quote hidden}

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