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Archive is here: Archive 1: October 2004 – April 2007
I'm not sure who would use this list but shouldn't it confine itself to actual bipolar 5-volt TTL parts, and not CMOS stuff like 744060, etc.? -- Wtshymanski 22:16, 7 June 2006 (UTC)
Phillips 74HC7266 datasheet:
http://www.ortodoxism.ro/datasheets/philips/74HC7266.pdf
74230 Octal Buffer/Driver with 3-state outputs
TI SN74AS230A datasheet:
http://www.unicornelectronics.com/ftp/Data%20Sheets/74as230.pdf
74222 16 x 4 Synchronous FIFO Memory with 3-State Outputs
I have a TI SN74LS222N (also listed as SN74LS222N) in my hand, but could not find a datasheet. It appears to be:
SN54LS222A 16 × 4 SYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY WITH 3-STATE OUTPUTS
...but I can't be sure without a datasheet.
-- Guy Macon ( talk) 23:17, 18 January 2007 (UTC)
Do these count as 7400 series ICs?
Texas Instruments SN74AUP1G57 Low-Power Configurable Multiple-Function Gate
Texas Instruments SN74AUP1G58 Low-Power Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G98 Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G97 Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G98 Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G99 Ultra-Configurable Multi-Function Gate With 3-State Outputs
If so, what number should they be listed under? Numbers 74157-58 74197-99 are already used by other parts.
-- Guy Macon ( talk) 01:40, 19 January 2007 (UTC)
Two more TTL chips 74LS827* 10-Bit Inverting Buffer/Driver 74LS828* 10-Bit Buffer/Driver 78.8.120.176 ( talk) 12:59, 23 May 2009 (UTC)
12.145.33.227 01:47, 19 January 2007 (UTC)
http://www.alldatasheet.com/ttl_list.html has a list of 7400 series parts.
Guy Macon ( talk) 19:11, 22 January 2007 (UTC)
i changed the links to the non-existant article "Exclusive NOR" (which redirects to the article on logical equality) to point to the more relevant article "XNOR gate". 142.165.95.83 23:06, 31 January 2007 (UTC)
Would adding puncuation between the 74 and the number in the series make the list easier to read? Perhaps make 74299 -> 74-299, 74*299, or just '299? I find the list rather hard to read, but possibly it's just me. Theorbtwo 13:09, 31 March 2007 (UTC)
Another 'main' use of this list is to find the function of a (possibly discontinued and/or unavailable) 74-series device, so as to figure out a replacement method or design around it. Many otherwise excellent datasheet resources on the Internet often do not include reference to such devices. There are also so-called 74-series devices which are/were manufactured by a limited number of fabs and have fallen out of use; this does not mean that they should be excluded from a list such as this in my opinion especially in the light of the other 'main' use of the list I mention above. It is worth noting that there are several very cooperative suppliers who still sell 'discontinued' or 'obsolete' devices from stock often bought in from companies with an overflow of unwanted stock for earlier products - very useful for repair and prototype modification purposes, as long as you can find and identify the device you are interested in. F.C.Trevor Gale. 80.101.115.225 ( talk) 02:24, 11 February 2014 (UTC)
Even more, I would like a table arranged by type of device, to find a part number from its type, e.g. this small example:
GATES | Quad 2-Input | Triple 3-Input | Dual 4-Input | 8-Input | More Inputs |
---|---|---|---|---|---|
AND | 7408, 7409*, 74130*,74131* | 7411, 7415* | 7421 | ||
OR | 7432 | 744075 | 744078 | ||
XOR | 74135, 74136*, 74386 | ||||
NAND | 7400, 7401*,7403*,7426*,7413,7424 | 7410, 7412* | 7420, 7422* | 7430 | 74133, 74134* |
7437, 7438*, 7439 | 7440, 74140 | ||||
NOR | 7402, 7436, 74232 | 7427 | 7423,7425,744002 | 744078 | |
7428, 7433*, 74128 | |||||
XNOR | 74135, 74266*, 747266 |
Maitchy ( talk) 01:58, 16 September 2009 (UTC)
I just archived this talk page as is, added a link to the archive, and removed all comments that do not apply to the content of the page. Wikipedia has a procedure for suggesting page deletion; that procedure should be followed rather tha arguing about whether the page is useful in it's talk page. If anyone disagrees with the archiving I did, please feel free to revert the talk page page to the previous state.
Guy Macon ( talk) 16:48, 18 May 2007 (UTC)
A table would be somewhat easier to read than a plain list, especially if additional columns of data are to be added. I have created an example converted table with additional columns here: User:DMahalko/7400table
DMahalko ( talk) 04:21, 30 April 2009 (UTC)
That's very useful, IMO. I will try to fill in the blank entries in the next few days, and then I will move it over to the main page. Guy Macon ( talk) 11:19, 23 May 2010 (UTC)
I would like to see a page for each of the 74xx/74xxx ic's with a pin-out for each. Since, generally speaking, each 7400-series device uses a "standardized" pin-out, there should not be any ambiguity in that regard. Specs could be ignored since there are diffences between 74xx/LS/HC, etc.
I would be happy to personally spearhead the effort (although it could take a while to complete).
I guess my only real concern is whether anyone besides me would find it useful. —Preceding unsigned comment added by Guy.cooper ( talk • contribs) 19:30, 27 October 2010 (UTC)
But given that each part number generally describes a different functional part, wouldn't that approach still lead to the creation of a few hundred pages? There would be some overlap where the higher part number represents just a next-generation of a part, so some savings could be realized. Or are you talking about combining all gate devices (without regard to the number of gates or inputs) on the same page? i.e.; All NAND gates on one page, all NOR gates on another, etc. That would realize additional savings. Guy.cooper ( talk) 16:47, 11 December 2010 (UTC)
The following entries...
74122: Retriggerable Monostable Multivibrator with Clear
74123: Dual Retriggerable Monostable Multivibrator with Clear
74130: Quad 2-input AND gate Buffer with 30V open collector outputs
74131: Quad 2-input AND gate Buffer with 15V open collector outputs
...appear to conflict with this TI datasheet:
http://focus.ti.com/lit/ds/symlink/sn74123.pdf
Any comments before I edit the Wikipedia page to match the datasheet?
Guy Macon ( talk) 22:40, 27 October 2010 (UTC)
Why is 74LS78A, an "LS" device included in the list? -- Mortense ( talk) 23:42, 18 November 2010 (UTC)
I placed a copy of the relevant datasheet here: (dead link)
As you can see, the H78 does not have the same pinout as the L78 and LS78A, the H78 and L78 do not have the same truth table as the LS78A, and the H78, L78, and LS78A have three different schematics and three different logic symbols.
As far as I know, this was the only time TI violated the rule that calls for the 74H78, 74L78, 74LS78, 74LS78A, etc. to have the same pinout and the same truth table. No other manufacturer appears to have repeated TI's error. I guess TI didn't get the memo about listing the 7400 series being easy and fun...
Alas, the List of 7400 series integrated circuits Wikipedia page is organized according to the rule that TI violated in this one instance, and so we have to list the parts separately. I just redid those three parts on the list with the hope that it will be clear what the differences are. BTW, can anyone find an online source for the TI datasheet I referenced above? I want to put in a note with a citation, but I don't want to link to my personal web page to do it. Guy Macon ( talk) 23:09, 1 February 2011 (UTC)
Right now the list has:
Here is where I am now on a better version:
I am signifying the different truth tables by listing Positive Pulse Triggered or Negative Edge Triggered in the description.
I can't find a TI 74LS78 datasheet, but it looks to me like only the 74H78 has a different pinout (please check and see i this is correct).
I don't know whether the 74LS78 is Positive Pulse Triggered Negative Edge Triggered.
Are there any examples of the same full part number having different truth tables or different pinouts?
Guy Macon ( talk) 02:02, 3 February 2011 (UTC)
Thanks! It looks like "74LS78" will work for the 74LS78 and 74LS78A, so I am going to change the page to this:
Guy Macon ( talk) 16:01, 4 February 2011 (UTC)
The References section of the article has this tag:
"This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please improve this article by introducing more precise citations where appropriate. (October 2009)"
It sounds as if this is asking for someone to put up to ten numbered links on every IC on the list showing which are listed in each TTL databook. Or perhaps it is asking for page numbers as well, which would make the references section hundreds of items long.
I agree that making the sources clear is very important, but I am having trouble figuring out how to do that in this particular case. Guy Macon ( talk) 22:54, 24 January 2011 (UTC)
Other than "this list should be deleted" (opinion duly noted), nobody has provided a good reason why the inline citations tag should be applied, and there are IMO good reasons why it should not be (see above), so I am removing it. Guy Macon ( talk) 14:45, 26 January 2011 (UTC)
The 74S262 is a 20-pin DIL package IC, in the 74-series of Schottky TTL, and is indeed a character-generator ROM in that technology. It was used in some ITT colour television Teletext Decoders which at the time used a great deal of other TTL in the design. I have several of these devices, date coded for 1977 and 1978 and I knew them as used in 1979. I do have the data sheet for this device but it will take a little time to find where I have it filed. F.C.Trevor Gale. 80.101.115.225 ( talk) 02:37, 11 February 2014 (UTC)
Evidence of this part (character generator ROM) is thinly strewn about some documents found on the net, for example in CQ-TV 130 p. 23. Proper datasheet seems to be unavailable online... What to do about it? — Preceding unsigned comment added by 217.226.232.239 ( talk) 20:42, 12 December 2011 (UTC)
The 74S262 is now in the main table. Drahtlos ( talk) 21:55, 27 November 2018 (UTC)
To datasheet, or not to datasheet, that is the question: Whether 'tis nobler in the mind to suffer the slings and arrows of missing pinouts and specifications, or to take arms against this sea of troubles, and by linking to a datasheet for each part end them: to link, to cite no more; and by a link, to say we end the heartache, and the thousand natural shocks that electronics engineering is heir to? 'Tis a consummation devoutly to be wished by Wtshymanski, to have a link-free list. To read, perchance to design by; aye, there's the rub, for in that designing without datasheets, what designs may come when we have shipped, must give us pause. There's the respect for remaining within the specification envelope that makes engineering of so long product life: for who would bear the whips and scorns of Wikipedia content disputes, the deletionist is without consensus, the proud inclusionist contumely, the pangs of despised Consensus, the Wikipedia Policies’ delay, the insolence of tendentious editors, and the spurns that patient merit of the unworthy Wikimarkup, when he himself might his Quietus make with a bare Bodkin?
We are gathered together here today to consider the following three edits:
This discussion touches upon a basic disagreement about what an encyclopedia is, and a deep disagreement by many, many editors about what is widely perceived as` shoving a particular interpretation down our throats against consensus. But it also is about this simple question: to link to datasheets or not to link to datasheets? Which makes for a better article? Please discuss. -- Guy Macon ( talk) 14:00, 29 December 2012 (UTC)
Maybe if we had a hot clue as to why we need to have datasheets in an encyclopedia, we could decide which datasheets to include? Or we could just keep Googling for random .PDF files and linking them here. -- Wtshymanski ( talk) 15:14, 8 January 2013 (UTC)
The article currently states
"There is even some reference to double-borrowings, such as 74193 -> 40193 -> 74HC40193[1]!" However other than the one reference the article cites I can't find any evidence that a 74HC40193 exists while a 74HC193 certainly does seem to. This seems to me to be more likely an error in a book than a part number actually used on a device. Plugwash ( talk) 23:04, 29 December 2012 (UTC)
Do we really need to include the '1G' parts in this list? After all, they're just single versions of the IC that's already described. IMO they just clutter the list. MinimanDragon32 ( talk) 10:33, 9 May 2014 (UTC)
Yes. Some more than could be added:
71.167.68.202 ( talk) 04:19, 17 December 2016 (UTC)
I added the new units column and started to classify the octal xxx parts as having 8 units but I think that that would only apply to units that are wholly independent, no? I.e. if they all share a common enable pin. If so, then we might want to consider renaming those to 8-bit xxx parts (single unit) since they operate in unison.-- Hooperbloob ( talk) 22:02, 23 October 2014 (UTC)
This part exist since we have it in our drawers in our lab. It seems to be a 1-of-16 multiplexor with tristate output. I didn't test the chips, though. 128.179.185.88 ( talk) 13:50, 10 March 2017 (UTC)
The 74x850 is now in the main table. Drahtlos ( talk) 21:57, 27 November 2018 (UTC)
Hello fellow Wikipedians,
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Per recent changes. AFAICS, there are two versions, for the same base part number (I've not seen this before).
The ur-74 series is a dual monostable. The later 74HCT series part though is an open collector high voltage driver (as AND gates). More sources are welcome, but we probably need to note both of them. Andy Dingley ( talk) 20:05, 26 July 2017 (UTC)
Hi everyone.
URLs pointing to nxp.com were all broken when I started looking through earlier today, and it seems like the old NXP datasheets have been moved to a new domain.
I went through and updated nxp.com datasheet URLs where I could, or substituted in some TI variants if I couldnt find the new corresponding datasheet.
Quite a large number were updated, so I wont list them all individually here. I hope everything I have changed is fine (first commit). — Preceding unsigned comment added by Tom.storey ( talk • contribs) 17:00, 5 August 2017 (UTC)
Hello fellow Wikipedians,
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As I incrementally cleanup the big table, if I can't find a datasheet then I'm moving those parts here until someone finds a datasheet. Also, I listed missing numbers from 7400 to 74200, in case they exist. • Sbmeirow • Talk • 04:11, 22 July 2018 (UTC) --- Special Thanks to Drahtlos for the massive amount of work after I briefly started a cleanup effort when I added blank cells for the four new columns: Input / Output / Pins / Datasheet. I updated the first 40 rows and added first 100+ datasheets, then Drahtlos did all the rest!!! • Sbmeirow • Talk • 11:05, 3 November 2018 (UTC)
Hi @ Sbmeirow: buffer is usually meant to indicate a higher output current, as in 7420 - dual 4-input NAND gate, vs 7440 - dual 4-input NAND buffer. If we replace buffer with gate in the description then perhaps something like "high current" should be indicated in the Output column. Or we could put 'buffer' back in the description... Cheers, Drahtlos ( talk) 20:01, 23 July 2018 (UTC)
The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.
Currently this page attempts to differentiate 'legacy' and 'modern' chips. Can we instead combine the section to focus on as list of functions in the 7400s? First, this creates an arbitrary line between of the age of a part and does not denote whether the part is in production. Second, the 7400 is a 2-input NAND gate where all subsequent families used a 74xx00 as a the NAND function in the family. This would remove the need for the 1G-3G tables since 1G-3G parts are their are device families; this is because the LVC1G and the LVC device families are different technologies and can be seen in the voltage ranges of the devices. Rings48 ( talk) 15:21, 26 July 2018 (UTC)
Is it more likely that a reader knows a part number (usually because they are looking at a board that has one on it) and wants to look up the function, or is it more likely that a reader is designing a new product using TTL, knows the function, and wants to find out the part number?
How about this; a section with all chips in numeric order, split per WP:NCSPLITLIST, and a section listing non-obsolete chips organized by function? -- Guy Macon ( talk) 03:08, 13 August 2018 (UTC)
As I looked through the old data books, I found several part numbers that were assigned twice for completely different functions, sometimes by different companies, sometimes even by Texas Instruments. How should those be handled? Should we list both assignments (as I started for 74x68 and 74x69)? Or, if we list only one, then which? Here are the conflicts I found:
Drahtlos ( talk) 15:15, 15 September 2018 (UTC)
@ Matthiaspaul: it appears that the {{anchor}} template does not handle multiple anchor values correctly (and I don't know how to fix the template). With the restored anchor, List of 7400-series integrated circuits#54888 works but List of 7400-series integrated circuits#74888 does not. Seeing that 74888 is used more often than 54888, I changed the anchor to the more common case. As a compromise, I will change the anchor from {{anchor|74888|54888}} to {{anchor|54888|74888}} so the more common case works now and both will work when the template is fixed. That said, 54888 is used only by redirects which nobody uses and which can probably be removed. Drahtlos ( talk) 01:32, 3 June 2020 (UTC)
Currently, sorting works one the title rows for each section. Options for fixing include:
I think it would be historically interesting and encyclopedically relevant to learn about the exact year of introduction of each of the listed parts, to be mentioned in a separate table column. However, I am well aware that this would be very difficult to track down reliably unless someone has a comprehensive archive of very old chip data sheets, catalogs and magazines. -- Matthiaspaul ( talk) 18:40, 17 May 2022 (UTC)
This article was nominated for deletion on 16 September 2009 (UTC). The result of the discussion was keep. |
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Archive is here: Archive 1: October 2004 – April 2007
I'm not sure who would use this list but shouldn't it confine itself to actual bipolar 5-volt TTL parts, and not CMOS stuff like 744060, etc.? -- Wtshymanski 22:16, 7 June 2006 (UTC)
Phillips 74HC7266 datasheet:
http://www.ortodoxism.ro/datasheets/philips/74HC7266.pdf
74230 Octal Buffer/Driver with 3-state outputs
TI SN74AS230A datasheet:
http://www.unicornelectronics.com/ftp/Data%20Sheets/74as230.pdf
74222 16 x 4 Synchronous FIFO Memory with 3-State Outputs
I have a TI SN74LS222N (also listed as SN74LS222N) in my hand, but could not find a datasheet. It appears to be:
SN54LS222A 16 × 4 SYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY WITH 3-STATE OUTPUTS
...but I can't be sure without a datasheet.
-- Guy Macon ( talk) 23:17, 18 January 2007 (UTC)
Do these count as 7400 series ICs?
Texas Instruments SN74AUP1G57 Low-Power Configurable Multiple-Function Gate
Texas Instruments SN74AUP1G58 Low-Power Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G98 Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G97 Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G98 Configurable Multiple-Function Gate
Texas Instruments SN74LVC1G99 Ultra-Configurable Multi-Function Gate With 3-State Outputs
If so, what number should they be listed under? Numbers 74157-58 74197-99 are already used by other parts.
-- Guy Macon ( talk) 01:40, 19 January 2007 (UTC)
Two more TTL chips 74LS827* 10-Bit Inverting Buffer/Driver 74LS828* 10-Bit Buffer/Driver 78.8.120.176 ( talk) 12:59, 23 May 2009 (UTC)
12.145.33.227 01:47, 19 January 2007 (UTC)
http://www.alldatasheet.com/ttl_list.html has a list of 7400 series parts.
Guy Macon ( talk) 19:11, 22 January 2007 (UTC)
i changed the links to the non-existant article "Exclusive NOR" (which redirects to the article on logical equality) to point to the more relevant article "XNOR gate". 142.165.95.83 23:06, 31 January 2007 (UTC)
Would adding puncuation between the 74 and the number in the series make the list easier to read? Perhaps make 74299 -> 74-299, 74*299, or just '299? I find the list rather hard to read, but possibly it's just me. Theorbtwo 13:09, 31 March 2007 (UTC)
Another 'main' use of this list is to find the function of a (possibly discontinued and/or unavailable) 74-series device, so as to figure out a replacement method or design around it. Many otherwise excellent datasheet resources on the Internet often do not include reference to such devices. There are also so-called 74-series devices which are/were manufactured by a limited number of fabs and have fallen out of use; this does not mean that they should be excluded from a list such as this in my opinion especially in the light of the other 'main' use of the list I mention above. It is worth noting that there are several very cooperative suppliers who still sell 'discontinued' or 'obsolete' devices from stock often bought in from companies with an overflow of unwanted stock for earlier products - very useful for repair and prototype modification purposes, as long as you can find and identify the device you are interested in. F.C.Trevor Gale. 80.101.115.225 ( talk) 02:24, 11 February 2014 (UTC)
Even more, I would like a table arranged by type of device, to find a part number from its type, e.g. this small example:
GATES | Quad 2-Input | Triple 3-Input | Dual 4-Input | 8-Input | More Inputs |
---|---|---|---|---|---|
AND | 7408, 7409*, 74130*,74131* | 7411, 7415* | 7421 | ||
OR | 7432 | 744075 | 744078 | ||
XOR | 74135, 74136*, 74386 | ||||
NAND | 7400, 7401*,7403*,7426*,7413,7424 | 7410, 7412* | 7420, 7422* | 7430 | 74133, 74134* |
7437, 7438*, 7439 | 7440, 74140 | ||||
NOR | 7402, 7436, 74232 | 7427 | 7423,7425,744002 | 744078 | |
7428, 7433*, 74128 | |||||
XNOR | 74135, 74266*, 747266 |
Maitchy ( talk) 01:58, 16 September 2009 (UTC)
I just archived this talk page as is, added a link to the archive, and removed all comments that do not apply to the content of the page. Wikipedia has a procedure for suggesting page deletion; that procedure should be followed rather tha arguing about whether the page is useful in it's talk page. If anyone disagrees with the archiving I did, please feel free to revert the talk page page to the previous state.
Guy Macon ( talk) 16:48, 18 May 2007 (UTC)
A table would be somewhat easier to read than a plain list, especially if additional columns of data are to be added. I have created an example converted table with additional columns here: User:DMahalko/7400table
DMahalko ( talk) 04:21, 30 April 2009 (UTC)
That's very useful, IMO. I will try to fill in the blank entries in the next few days, and then I will move it over to the main page. Guy Macon ( talk) 11:19, 23 May 2010 (UTC)
I would like to see a page for each of the 74xx/74xxx ic's with a pin-out for each. Since, generally speaking, each 7400-series device uses a "standardized" pin-out, there should not be any ambiguity in that regard. Specs could be ignored since there are diffences between 74xx/LS/HC, etc.
I would be happy to personally spearhead the effort (although it could take a while to complete).
I guess my only real concern is whether anyone besides me would find it useful. —Preceding unsigned comment added by Guy.cooper ( talk • contribs) 19:30, 27 October 2010 (UTC)
But given that each part number generally describes a different functional part, wouldn't that approach still lead to the creation of a few hundred pages? There would be some overlap where the higher part number represents just a next-generation of a part, so some savings could be realized. Or are you talking about combining all gate devices (without regard to the number of gates or inputs) on the same page? i.e.; All NAND gates on one page, all NOR gates on another, etc. That would realize additional savings. Guy.cooper ( talk) 16:47, 11 December 2010 (UTC)
The following entries...
74122: Retriggerable Monostable Multivibrator with Clear
74123: Dual Retriggerable Monostable Multivibrator with Clear
74130: Quad 2-input AND gate Buffer with 30V open collector outputs
74131: Quad 2-input AND gate Buffer with 15V open collector outputs
...appear to conflict with this TI datasheet:
http://focus.ti.com/lit/ds/symlink/sn74123.pdf
Any comments before I edit the Wikipedia page to match the datasheet?
Guy Macon ( talk) 22:40, 27 October 2010 (UTC)
Why is 74LS78A, an "LS" device included in the list? -- Mortense ( talk) 23:42, 18 November 2010 (UTC)
I placed a copy of the relevant datasheet here: (dead link)
As you can see, the H78 does not have the same pinout as the L78 and LS78A, the H78 and L78 do not have the same truth table as the LS78A, and the H78, L78, and LS78A have three different schematics and three different logic symbols.
As far as I know, this was the only time TI violated the rule that calls for the 74H78, 74L78, 74LS78, 74LS78A, etc. to have the same pinout and the same truth table. No other manufacturer appears to have repeated TI's error. I guess TI didn't get the memo about listing the 7400 series being easy and fun...
Alas, the List of 7400 series integrated circuits Wikipedia page is organized according to the rule that TI violated in this one instance, and so we have to list the parts separately. I just redid those three parts on the list with the hope that it will be clear what the differences are. BTW, can anyone find an online source for the TI datasheet I referenced above? I want to put in a note with a citation, but I don't want to link to my personal web page to do it. Guy Macon ( talk) 23:09, 1 February 2011 (UTC)
Right now the list has:
Here is where I am now on a better version:
I am signifying the different truth tables by listing Positive Pulse Triggered or Negative Edge Triggered in the description.
I can't find a TI 74LS78 datasheet, but it looks to me like only the 74H78 has a different pinout (please check and see i this is correct).
I don't know whether the 74LS78 is Positive Pulse Triggered Negative Edge Triggered.
Are there any examples of the same full part number having different truth tables or different pinouts?
Guy Macon ( talk) 02:02, 3 February 2011 (UTC)
Thanks! It looks like "74LS78" will work for the 74LS78 and 74LS78A, so I am going to change the page to this:
Guy Macon ( talk) 16:01, 4 February 2011 (UTC)
The References section of the article has this tag:
"This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please improve this article by introducing more precise citations where appropriate. (October 2009)"
It sounds as if this is asking for someone to put up to ten numbered links on every IC on the list showing which are listed in each TTL databook. Or perhaps it is asking for page numbers as well, which would make the references section hundreds of items long.
I agree that making the sources clear is very important, but I am having trouble figuring out how to do that in this particular case. Guy Macon ( talk) 22:54, 24 January 2011 (UTC)
Other than "this list should be deleted" (opinion duly noted), nobody has provided a good reason why the inline citations tag should be applied, and there are IMO good reasons why it should not be (see above), so I am removing it. Guy Macon ( talk) 14:45, 26 January 2011 (UTC)
The 74S262 is a 20-pin DIL package IC, in the 74-series of Schottky TTL, and is indeed a character-generator ROM in that technology. It was used in some ITT colour television Teletext Decoders which at the time used a great deal of other TTL in the design. I have several of these devices, date coded for 1977 and 1978 and I knew them as used in 1979. I do have the data sheet for this device but it will take a little time to find where I have it filed. F.C.Trevor Gale. 80.101.115.225 ( talk) 02:37, 11 February 2014 (UTC)
Evidence of this part (character generator ROM) is thinly strewn about some documents found on the net, for example in CQ-TV 130 p. 23. Proper datasheet seems to be unavailable online... What to do about it? — Preceding unsigned comment added by 217.226.232.239 ( talk) 20:42, 12 December 2011 (UTC)
The 74S262 is now in the main table. Drahtlos ( talk) 21:55, 27 November 2018 (UTC)
To datasheet, or not to datasheet, that is the question: Whether 'tis nobler in the mind to suffer the slings and arrows of missing pinouts and specifications, or to take arms against this sea of troubles, and by linking to a datasheet for each part end them: to link, to cite no more; and by a link, to say we end the heartache, and the thousand natural shocks that electronics engineering is heir to? 'Tis a consummation devoutly to be wished by Wtshymanski, to have a link-free list. To read, perchance to design by; aye, there's the rub, for in that designing without datasheets, what designs may come when we have shipped, must give us pause. There's the respect for remaining within the specification envelope that makes engineering of so long product life: for who would bear the whips and scorns of Wikipedia content disputes, the deletionist is without consensus, the proud inclusionist contumely, the pangs of despised Consensus, the Wikipedia Policies’ delay, the insolence of tendentious editors, and the spurns that patient merit of the unworthy Wikimarkup, when he himself might his Quietus make with a bare Bodkin?
We are gathered together here today to consider the following three edits:
This discussion touches upon a basic disagreement about what an encyclopedia is, and a deep disagreement by many, many editors about what is widely perceived as` shoving a particular interpretation down our throats against consensus. But it also is about this simple question: to link to datasheets or not to link to datasheets? Which makes for a better article? Please discuss. -- Guy Macon ( talk) 14:00, 29 December 2012 (UTC)
Maybe if we had a hot clue as to why we need to have datasheets in an encyclopedia, we could decide which datasheets to include? Or we could just keep Googling for random .PDF files and linking them here. -- Wtshymanski ( talk) 15:14, 8 January 2013 (UTC)
The article currently states
"There is even some reference to double-borrowings, such as 74193 -> 40193 -> 74HC40193[1]!" However other than the one reference the article cites I can't find any evidence that a 74HC40193 exists while a 74HC193 certainly does seem to. This seems to me to be more likely an error in a book than a part number actually used on a device. Plugwash ( talk) 23:04, 29 December 2012 (UTC)
Do we really need to include the '1G' parts in this list? After all, they're just single versions of the IC that's already described. IMO they just clutter the list. MinimanDragon32 ( talk) 10:33, 9 May 2014 (UTC)
Yes. Some more than could be added:
71.167.68.202 ( talk) 04:19, 17 December 2016 (UTC)
I added the new units column and started to classify the octal xxx parts as having 8 units but I think that that would only apply to units that are wholly independent, no? I.e. if they all share a common enable pin. If so, then we might want to consider renaming those to 8-bit xxx parts (single unit) since they operate in unison.-- Hooperbloob ( talk) 22:02, 23 October 2014 (UTC)
This part exist since we have it in our drawers in our lab. It seems to be a 1-of-16 multiplexor with tristate output. I didn't test the chips, though. 128.179.185.88 ( talk) 13:50, 10 March 2017 (UTC)
The 74x850 is now in the main table. Drahtlos ( talk) 21:57, 27 November 2018 (UTC)
Hello fellow Wikipedians,
I have just modified 22 external links on List of 7400 series integrated circuits. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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Per recent changes. AFAICS, there are two versions, for the same base part number (I've not seen this before).
The ur-74 series is a dual monostable. The later 74HCT series part though is an open collector high voltage driver (as AND gates). More sources are welcome, but we probably need to note both of them. Andy Dingley ( talk) 20:05, 26 July 2017 (UTC)
Hi everyone.
URLs pointing to nxp.com were all broken when I started looking through earlier today, and it seems like the old NXP datasheets have been moved to a new domain.
I went through and updated nxp.com datasheet URLs where I could, or substituted in some TI variants if I couldnt find the new corresponding datasheet.
Quite a large number were updated, so I wont list them all individually here. I hope everything I have changed is fine (first commit). — Preceding unsigned comment added by Tom.storey ( talk • contribs) 17:00, 5 August 2017 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on List of 7400 series integrated circuits. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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As I incrementally cleanup the big table, if I can't find a datasheet then I'm moving those parts here until someone finds a datasheet. Also, I listed missing numbers from 7400 to 74200, in case they exist. • Sbmeirow • Talk • 04:11, 22 July 2018 (UTC) --- Special Thanks to Drahtlos for the massive amount of work after I briefly started a cleanup effort when I added blank cells for the four new columns: Input / Output / Pins / Datasheet. I updated the first 40 rows and added first 100+ datasheets, then Drahtlos did all the rest!!! • Sbmeirow • Talk • 11:05, 3 November 2018 (UTC)
Hi @ Sbmeirow: buffer is usually meant to indicate a higher output current, as in 7420 - dual 4-input NAND gate, vs 7440 - dual 4-input NAND buffer. If we replace buffer with gate in the description then perhaps something like "high current" should be indicated in the Output column. Or we could put 'buffer' back in the description... Cheers, Drahtlos ( talk) 20:01, 23 July 2018 (UTC)
The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.
Currently this page attempts to differentiate 'legacy' and 'modern' chips. Can we instead combine the section to focus on as list of functions in the 7400s? First, this creates an arbitrary line between of the age of a part and does not denote whether the part is in production. Second, the 7400 is a 2-input NAND gate where all subsequent families used a 74xx00 as a the NAND function in the family. This would remove the need for the 1G-3G tables since 1G-3G parts are their are device families; this is because the LVC1G and the LVC device families are different technologies and can be seen in the voltage ranges of the devices. Rings48 ( talk) 15:21, 26 July 2018 (UTC)
Is it more likely that a reader knows a part number (usually because they are looking at a board that has one on it) and wants to look up the function, or is it more likely that a reader is designing a new product using TTL, knows the function, and wants to find out the part number?
How about this; a section with all chips in numeric order, split per WP:NCSPLITLIST, and a section listing non-obsolete chips organized by function? -- Guy Macon ( talk) 03:08, 13 August 2018 (UTC)
As I looked through the old data books, I found several part numbers that were assigned twice for completely different functions, sometimes by different companies, sometimes even by Texas Instruments. How should those be handled? Should we list both assignments (as I started for 74x68 and 74x69)? Or, if we list only one, then which? Here are the conflicts I found:
Drahtlos ( talk) 15:15, 15 September 2018 (UTC)
@ Matthiaspaul: it appears that the {{anchor}} template does not handle multiple anchor values correctly (and I don't know how to fix the template). With the restored anchor, List of 7400-series integrated circuits#54888 works but List of 7400-series integrated circuits#74888 does not. Seeing that 74888 is used more often than 54888, I changed the anchor to the more common case. As a compromise, I will change the anchor from {{anchor|74888|54888}} to {{anchor|54888|74888}} so the more common case works now and both will work when the template is fixed. That said, 54888 is used only by redirects which nobody uses and which can probably be removed. Drahtlos ( talk) 01:32, 3 June 2020 (UTC)
Currently, sorting works one the title rows for each section. Options for fixing include:
I think it would be historically interesting and encyclopedically relevant to learn about the exact year of introduction of each of the listed parts, to be mentioned in a separate table column. However, I am well aware that this would be very difficult to track down reliably unless someone has a comprehensive archive of very old chip data sheets, catalogs and magazines. -- Matthiaspaul ( talk) 18:40, 17 May 2022 (UTC)