EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: Pasky on February 15, 2015, 11:45:47 pm
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I'm thinking similar to those home made devices you see on Ebay that can identify transistors, diodes, and etc... But I'm looking for a device that can identify 7400 logic chips. Does such a device exist? If so what are they called? Where can I purchase one and how much should I be expecting to pay for one? Thank you.
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Common on Ebay.....
http://www.ebay.co.uk/itm/Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-FET-/181100277247?pt=LH_DefaultDomain_3&hash=item2a2a6aedff (http://www.ebay.co.uk/itm/Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-FET-/181100277247?pt=LH_DefaultDomain_3&hash=item2a2a6aedff)
http://www.ebay.co.uk/itm/Integrated-Circuit-IC-Tester-f-74-40-45-Series-Logic-Gate-Tester-Digital-Meter-/251836565232?pt=LH_DefaultDomain_3&hash=item3aa2a106f0 (http://www.ebay.co.uk/itm/Integrated-Circuit-IC-Tester-f-74-40-45-Series-Logic-Gate-Tester-Digital-Meter-/251836565232?pt=LH_DefaultDomain_3&hash=item3aa2a106f0)
http://www.ebay.co.uk/itm/NEW-DIGITAL-IC-INTEGRATED-CIRCUIT-TESTER-TTL-CMOS-RAM-/281599554082?pt=LH_DefaultDomain_3&hash=item4190a43222 (http://www.ebay.co.uk/itm/NEW-DIGITAL-IC-INTEGRATED-CIRCUIT-TESTER-TTL-CMOS-RAM-/281599554082?pt=LH_DefaultDomain_3&hash=item4190a43222)
http://www.ebay.co.uk/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-FET-MOS-PNP-NPN-/291221017100?pt=LH_DefaultDomain_3&hash=item43ce20120c (http://www.ebay.co.uk/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-FET-MOS-PNP-NPN-/291221017100?pt=LH_DefaultDomain_3&hash=item43ce20120c)
http://www.ebay.co.uk/itm/Tester-Ic-Linear-Handy-LEAPER-2-/350714894240?pt=LH_DefaultDomain_3&hash=item51a83c97a0 (http://www.ebay.co.uk/itm/Tester-Ic-Linear-Handy-LEAPER-2-/350714894240?pt=LH_DefaultDomain_3&hash=item51a83c97a0)
http://www.ebay.co.uk/itm/LEAP-ELECTRONIC-LP-1A-TESTER-DIGITAL-IC-W-O-ADAPTOR-/271739976215?pt=LH_DefaultDomain_3&hash=item3f44f6fa17 (http://www.ebay.co.uk/itm/LEAP-ELECTRONIC-LP-1A-TESTER-DIGITAL-IC-W-O-ADAPTOR-/271739976215?pt=LH_DefaultDomain_3&hash=item3f44f6fa17)
Some just test, others can identify many common IC types.
Several Chinese Universal programmers also include a 74 and 4000 series tester/identifier as well.
Aurora
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Excellent, thank you Aurora! Would you be able to recommend one in specific that can test and identify?
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I'm thinking similar to those home made devices you see on Ebay that can identify transistors, diodes, and etc... But I'm looking for a device that can identify 7400 logic chips. Does such a device exist? If so what are they called? Where can I purchase one and how much should I be expecting to pay for one? Thank you.
They do seem to exist.
This one says...
1.self-diagnosis
2.identify unknown model No.
3.test 54/74 series TTL
4.test 4000&4500 series CMOS
5.40pin capability,
http://mch.en.alibaba.com/product/563651898-219143487/IC_Tester_54_74_series_Digital_IC_Tester_Universal_IC_Tester_MCH_YBD_868.html (http://mch.en.alibaba.com/product/563651898-219143487/IC_Tester_54_74_series_Digital_IC_Tester_Universal_IC_Tester_MCH_YBD_868.html)
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My chinese TOP2005 universal programmer can do it. It works resonably well, at least with simpler IC's like gates and flipflops. I haven't tested it extensively but I'd guess it does identify about 75% of the IC's correctly. It can't automagically determine between 7400 and 4000 series, though.
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Sorry, no recommendations as I do not have a need for such a unit. All suspect IC's are removed and new parts fitted in my workshop. This sort of gadget may be useful to those without easy access to replacement parts or where an OEM has removed a simple logic IC's identification.
If I were going to buy one, I would start off at a reasonably cheap model and see how useful these things really are.
I would likely buy this unit as it claims to do what is needed of it and looks reasonable for the money:
http://www.ebay.co.uk/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-FET-MOS-PNP-NPN-/291221017100?pt=LH_DefaultDomain_3&hash=item43ce20120c (http://www.ebay.co.uk/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-FET-MOS-PNP-NPN-/291221017100?pt=LH_DefaultDomain_3&hash=item43ce20120c)
also available from here:
http://www.ebay.co.uk/itm/NEW-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-/111030818336?pt=LH_DefaultDomain_3&hash=item19d9f3d620 (http://www.ebay.co.uk/itm/NEW-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-/111030818336?pt=LH_DefaultDomain_3&hash=item19d9f3d620)
Aurora
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Some boards I have, have the IC identifiers scratched off, so something like this could speed up the process in identifying them.
Thank you all for your advice and help, you've saved me a lot of time in finding what I need. Cheers!
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I'm baffled by the sudden interest in TTL chips.
Did someone invent a working time machine? If so, can you go back to 1987 and kick my ass?
Thanks.
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I'm thinking similar to those home made devices you see on Ebay that can identify transistors, diodes, and etc... But I'm looking for a device that can identify 7400 logic chips. Does such a device exist? If so what are they called? Where can I purchase one and how much should I be expecting to pay for one? Thank you.
Eyeball. They put the part number right on the chip. What's with this sudden interest in TTL chips on here? Did a wormhole to 1983 open somewhere?
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Hrmm, just messaged the seller for this device:
http://www.ebay.co.uk/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-FET-MOS-PNP-NPN-/291221017100?pt=LH_DefaultDomain_3&hash=item43ce20120c (http://www.ebay.co.uk/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-FET-MOS-PNP-NPN-/291221017100?pt=LH_DefaultDomain_3&hash=item43ce20120c)
They just replied back saying it cannot identify 7400 logic chips. Bummer.
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I'm baffled by the sudden interest in TTL chips.
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You know, for some of us hobbyists there's nothing wrong with good old TTL. I have tons of them and use them when I need them.
Nobody's suggesting putting it in new production stuff.
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@Pasky
Really ? Maybe he does not understand the question or remember the original 74xx IC's ?
7400 series are 5V logic gates just like a 74LS so the worst it will do is identify a 74xx as a 74LSxx. Depending upon the application that may or may not be an issue.
I grew up on 74 and 4000 series IC's and have a large spares stock. as has been stated tehse are considered elderly chips. But when you are repairing old but high quality equipment who cares if they are obsolete....unless you can't find a replacement of course ;) My 1990's/early 2000's professional thermal cameras cost around $56000 and still used 74HC series buffers in the design. They are SMT technology though ;)
I have 74xx, 74LS, 74ALS, 74HC and 74HCT series in my spares drawers.... some are so old that they are virtually antiques :-DD
Aurora
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Let there be no snobbery about chips and their ages :-DD
Aurora
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I'm baffled by the sudden interest in TTL chips.
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You know, for some of us hobbyists there's nothing wrong with good old TTL. I have tons of them and use them when I need them.
Nobody's suggesting putting it in new production stuff.
You're right, no one did. And I don't think that's the point either.
Why not encourage the young lad to get a nice stash of DK96s, 12AU6s, filament transformers, Leyden jars, and those big wall-mounted knife switches that Dr Frankenstein used?
Whether or not *I* enjoy that as a hobby, doesn't mean that's the best path to start.
Just skip the old nostalgia junk and just go for the fresh and modern.
It won't hurt. Promise.
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I'm baffled by the sudden interest in TTL chips.
...
You know, for some of us hobbyists there's nothing wrong with good old TTL. I have tons of them and use them when I need them.
Nobody's suggesting putting it in new production stuff.
You're right, no one did. And I don't think that's the point either.
Why not encourage the young lad to get a nice stash of DK96s, 12AU6s, filament transformers, Leyden jars, and those big wall-mounted knife switches that Dr Frankenstein used?
Whether or not *I* enjoy that as a hobby, doesn't mean that's the best path to start.
Just skip the old nostalgia junk and just go for the fresh and modern.
It won't hurt. Promise.
Where do you get this idea that I'm creating a new circuit using 7400 logic chips? I'm actually reverse engineering some boards and the identification marks on the chips have been scraped away as I said in an earlier post. Not to mention, what the hell do your 3 posts even offer to the topic? We get it, 7400 is obsolete.
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Many cheap universal programmers (like the Wellon) can do it. If a device isn't supported or incorrectly identified you can create an id pattern for it.
Here is a link to mcumall. Look at the VP series. You can download the software and try it out without the programmer connected. Canadian company I believe.
http://www.mcumall.com/downloads/ (http://www.mcumall.com/downloads/)
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Thanks, I have a TOP 3000 programmer. I'm unsure if it's compatible with the Wellon type though. I tried to search in the program how to identify chips when someone else mentioned earlier they use their TOP programmer as well. I can't seem to find the option. I tried 'Read MFC' but it didn't work. Let me see if what you posted has something I can work with. Thanks.
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On a Wellon click on the test menu then pick autofind, simple as that.
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I'm baffled by the sudden interest in TTL chips.
...
You know, for some of us hobbyists there's nothing wrong with good old TTL. I have tons of them and use them when I need them.
Nobody's suggesting putting it in new production stuff.
You're right, no one did. And I don't think that's the point either.
Why not encourage the young lad to get a nice stash of DK96s, 12AU6s, filament transformers, Leyden jars, and those big wall-mounted knife switches that Dr Frankenstein used?
Whether or not *I* enjoy that as a hobby, doesn't mean that's the best path to start.
Just skip the old nostalgia junk and just go for the fresh and modern.
It won't hurt. Promise.
Where do you get this idea that I'm creating a new circuit using 7400 logic chips? I'm actually reverse engineering some boards and the identification marks on the chips have been scraped away as I said in an earlier post. Not to mention, what the hell do your 3 posts even offer to the topic? We get it, 7400 is obsolete.
Nowhere in your initial post do you say you're reverse engineering anything.
How do you even know they're 7400 logic if the markings are removed? They could be CMOS, or GALs, PALs, you name it.
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Reverse engineering is fun.
I've never seen a PAL or GAL with marking removed, no need really.
As for CMOS or TTL start with your eyes any marked chips you see is a place to start. Of course that doesn't mean you cant mix but it is a start. Supply voltage also handy.
Even with a chip identifier of some sort there can be multiple hit's. Part of the game is to hit the datasheets and check each one out.
It can be quite profitable to keep some old gear in operation. I still do it for some old customers even though I retired.
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Just looking at the ebay ic testers.
This one looks very useful. Yes, I know it's both Chinese and a gadget. It does more than just logic.
Video
???????????? ???????—????—???????????? (http://v.youku.com/v_show/id_XMzQ5NzI1ODgw)
Ebay link
http://www.ebay.ca/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-/121216153333?pt=LH_DefaultDomain_0&hash=item1c390bb6f5 (http://www.ebay.ca/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-/121216153333?pt=LH_DefaultDomain_0&hash=item1c390bb6f5)
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Thanks, I have a TOP 3000 programmer. I'm unsure if it's compatible with the Wellon type though. I tried to search in the program how to identify chips when someone else mentioned earlier they use their TOP programmer as well. I can't seem to find the option. I tried 'Read MFC' but it didn't work. Let me see if what you posted has something I can work with. Thanks.
Did you find it yet? I don't know how similar the software is but in my version
you
- click on the Type button
- then select TTL/CMOS
- double click on Standard (Menufactrue? wtf? Never noticed that one before)
- Then choose 74/40/45 logik series
- In the next screen you can click Search, that sometimes finds the inserted part.
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Nowhere in your initial post do you say you're reverse engineering anything.
How do you even know they're 7400 logic if the markings are removed? They could be CMOS, or GALs, PALs, you name it.
If you had bothered to read the entire topic before replying rather than the first post, you'll see it's right before your first reply. https://www.eevblog.com/forum/beginners/any-devices-i-can-purchase-that-can-identify-logic-chips/msg610621/#msg610621. (https://www.eevblog.com/forum/beginners/any-devices-i-can-purchase-that-can-identify-logic-chips/msg610621/#msg610621.) I know their not gal's or PAL's because of the layout and if they were I could have just dumped them with my programmer. Again, you're just going off for no reason without even looking into what you're replying at.
Just looking at the ebay ic testers.
This one looks very useful. Yes, I know it's both Chinese and a gadget. It does more than just logic.
Video
???????????? ???????—????—???????????? (http://v.youku.com/v_show/id_XMzQ5NzI1ODgw)
Ebay link
http://www.ebay.ca/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-/121216153333?pt=LH_DefaultDomain_0&hash=item1c390bb6f5 (http://www.ebay.ca/itm/New-Transistor-Tester-Detect-IC-Tester-Meter-Maintenance-Tester-MOS-PNP-NPN-/121216153333?pt=LH_DefaultDomain_0&hash=item1c390bb6f5)
Awesome, definitely what I need. I guess the seller did misunderstand then. I'll be grabbing one of these. Thanks everyone!
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There appear to be two versions of that tester. If you look at the ebay links I previously provided you will see that there is a later model that has more membrane button ? In other respects its seems the same. It would be worth buying the latest version as it may have bug fixes and/or more IC identities loaded.
Aurora
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Have you had a look at your TOP3000 programmer? Does it really not have the function the TOP2005 has? Seems a waste to buy something when you've already got it.
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Have you had a look at your TOP3000 programmer? Does it really not have the function the TOP2005 has? Seems a waste to buy something when you've already got it.
Ah, I found this area. I have some logic chips lying around and I'll test it with it later today. It's under 'Tools -> Test IC' in Topall v8.17.
(http://i.imgur.com/cXE2s2z.png)