IC testers for TTL, CMOS, Op amps, etc

Discussion in 'General Electronics Chat' started by SamEricson, Apr 28, 2015.

  1. SamEricson

    Thread Starter Member

    Apr 25, 2015
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    What is some good IC chips that have a large library for every TTL, CMOS, Op amps . etc. to test IC chips in circuit and out of circuit?

    The Huntron doesn't have any library or compare to a known good IC chip. So I need to buy some IC testers to be able to have a library to compare to for troubleshooting circuit boards.

    I use the Hutron to check the signatures of IC chips in circuit but I need an IC tester to test TTL, CMOS, Op amps etc to know if the IC chips are good or not.
     
  2. #12

    Expert

    Nov 30, 2010
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    There is no such thing as an IC chip that has a library of other chips inside it.
    You will just have to do as you said in your second sentence.
     
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  3. Papabravo

    Expert

    Feb 24, 2006
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    I don't even know if there are testers for individual chips. Making money of off such a device seems like a very unlikely proposition. For boards they have bed of nails testers, but you need advanced training just to program and run one of those monsters.
     
  4. #12

    Expert

    Nov 30, 2010
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    I don't know if there are such testers available on a retail level. Individual chip testers were made in-house (where I worked) for incoming parts assessment. About half a dozen circuits were used for each part number in the purchase order. SamEricson will probably end up doing that.
     
  5. SamEricson

    Thread Starter Member

    Apr 25, 2015
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    BK 570A , circuit IC tester
    http://www.mouser.com/ds/2/43/575A_datasheet-182467.pdf

    Vizatek IC test
    http://www.amazon.com/VIZATEK-VZ4-Portable-Digital-Tester/dp/B00BGA6LAG/ref=sr_1_2?ie=UTF8&qid=1430255861&sr=8-2&keywords=IC tester

    Leaper-2
    http://www.amazon.com/IC-Tester-Han..._sbs_hi_3?ie=UTF8&refRID=1R3TMZNJ14J29RG2XHK5

    The only problem is that I have to remove the IC chips one by one to test the IC chip using these IC tests

    The ECOMMS BUGTRAP Logic comparator model 2000C is really nice because you can use IC Test Clips and leave the IC chip in circuit
     
    Last edited: Apr 28, 2015
  6. Papabravo

    Expert

    Feb 24, 2006
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    I don't envy him having that responsibility. Bad parts that impede customer confidence will get you fired regardless of whose fault it was.

    Wow $1,170.00 for the 575A I suppose it is worth it for some people. It never was for us.
     
  7. SamEricson

    Thread Starter Member

    Apr 25, 2015
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    I have to unsolder the IC chips one by one and test them using a Leaper-2. I'm looking for something so i can test the In circuit using IC clips 8pin IC chips, 16pin IC chips, 24 Ic chips. etc
     
  8. SamEricson

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    Apr 25, 2015
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  9. dl324

    Distinguished Member

    Mar 30, 2015
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    In circuit testing needs to be included in the design. For the majority of designs, it's not worth the bother.

    When I worked on HP 3000 Series III computers, we were able to write machine language programs that exercised certain logic. We did this to supplement what the regular diagnostics checked.

    HP made a logic comparator (HP 10529A) that allowed you to insert a personality module that emulated functionality of the chip you wanted to compare. You ran the chip in it's circuit as normal, but you clipped the comparator with the personality module for that chip. It compared the behavior of the chip in-circuit and flagged any differences. This may be the best fit you'll find for your needs. But it can only test up to 16 pin logic chips.

    Here's a URL for the manual: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCMQFjAB&url=http://www.arcade-museum.com/manuals-test-equipment/10529A-Year1973-Manual.pdf&ei=gANAVem2M8zooATzwYGYDA&usg=AFQjCNGSV7v0KjMM1Ot36HoltjcyW9Fr6g&sig2=f5XFLaRtbV3MdNFgSIpbjw&bvm=bv.91665533,d.cGU

    Theory of operation starts on page 14.

    I have one, but haven't used it. I've been meaning to make some boards so I don't have to use the expensive ones that came with it.
     
    Last edited: Apr 28, 2015
  10. SamEricson

    Thread Starter Member

    Apr 25, 2015
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    The ECOMMS BUGTRAP Logic comparator model 2000C is very close to the HP 10529A

    HP548 Logic Test Clip also
     
  11. dl324

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    They work well when you can single step the circuit or the clock is already very slow. I have a handful of these clips...
     
  12. SamEricson

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    Apr 25, 2015
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    Is it best to disconnect the clock and use a external function generator at a very slow clock speed?

    How can you single step a logic circuit? I know some logic circuits have a test mode in the diagnostics mode
     
  13. studiot

    AAC Fanatic!

    Nov 9, 2007
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    Logic state indicator and pulsers probes were very popular a few years back.

    More recently I saw a multimeter with the facility.

    http://forum.allaboutcircuits.com/threads/extra-functions-on-multimeter.106159/

    I also recently bought, but never received a TTL/CMOS chip tester module from HongKong.
    This was the first time supply has let me down from Asia and I haven't dared order another since they allegedly sent a replacement that didn't arrive either.
     
  14. dl324

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    Yes, otherwise the LEDs on the HP548A will probably flash too quickly.
    For the example I gave regarding HP 3000, I was working in the factory that assembled them. We (and Field Service) had something called a "Maintenance Panel" that connected through an aux port and allowed us to single step the computer. Any complex equipment will have test capability built in, but it isn't likely to be exposed to third party repair shops.
     
  15. dl324

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    Old timers like me are more likely to use them. I was just entering the field when HP was making their first set. These days it's more economical to replace a board than troubleshoot to the component level. Board swappers were even around when I first started out. I'd better stop there before I get on my soap box...
     
  16. SamEricson

    Thread Starter Member

    Apr 25, 2015
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    Global Specialties LM-2A Logic Monitor for CMOS or TTL ICs

    ABI Digital IC Tester Chip Master Compact

    Caseless IC Tester model TES200

    HP Comparator 5011T or 10529A
     
  17. SamEricson

    Thread Starter Member

    Apr 25, 2015
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    Can I replace an IC chips that with the same number but has a difference speed or when does it make a difference?

    I have seen techs replace IC chips that is a 74H with a 74C or 74S , does it really matter or when does it matter?

    This is called the Speed Numbers right?
    74 = Standard TTL
    74H = High speed TTL
    74L = Low Power TTL
    74S = Schottky TTL
    74LS = Low Power Schottky TTL
    74AS = Advanced Schottky TTL
    74ALS = Advanced Low Power Schottky TTL
    74C = Metal Gate (Pins are compatible with TTL)
    74HC = Silicon Gate High Speed (Pins are compatible with TTL)
    74HCT = Silicon Gate High Speed (compatible with TTL)
     
  18. #12

    Expert

    Nov 30, 2010
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    1) It has a different speed.
    2) Which circuit are you talking about? All of them? There is no one answer for all circuits everywhere all the time.
     
  19. dl324

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    As a general rule, no.
    Either those techs really know what they're doing; or they don't know what they're doing. I'd tend to believe the latter.

    Speed, fan in/out, threshold levels, ...; generally not interchangeable.
     
  20. SamEricson

    Thread Starter Member

    Apr 25, 2015
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    Yes I have noticed that also from the datasheets

    So the identification is this chart is called what?

    I know the IC testers get confused when testing the same IC part number but this identification list gets confusing for IC testers. I'm guessing it's called identification for say the 74H, 74L, 74s etc.

    When using either:
    Global Specialties LM-2A Logic Monitor for CMOS or TTL ICs
    The ECOMMS BUGTRAP Logic comparator model 2000C
    HP Comparator 5011T or 10529A

    You have to have the exact IC part number and identification or it won't test the TTL or CMOS chip right. Plus you have to buy a lot of parts to have on hand to verify.
     
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