Testing TTLs in circuit

[caius]

Hi all,
I have two logical comparators (HP and B&K) but sometimes they gives false positive so I'm wondering if there is some device that can test TTL (74XX) in circuit, I mean testing if logical functions of the internal gates are correct (like my EPROM programmer can do out of circuit )

Thanks

P.S.
I presume that connecting the TTL in circuit to the socket of the EPROM programmer (using some clip) and trying to test it would be not very useful since you will power the whole PCB in this way.

 

[RGP]

ABI Boardmaster is the only one I personally know of but that doesn't mean it's the only one.

You get clips and stick them on the IC, you tell the ABI which 74xx chip it is and it detects which way round, powers it up and runs tests.

Of course, out of circuit testing in isolation is absolutely the best way but all that desoldering will take hours.

There are very likely other testers, I just don't know of them.

 

[caius]

Thanks, infact this ABI BOARDMASTEE 4000 IC tester is the one I'm looking for.Do you some source to get this from?

Otherwise I have found this model:

http://www.bkprecision.com/products...nued/560B-560b-28-pin-progrmbl-ic-tester.htmlhttp://www.bkprecision.com/products/uncategorized/discontinued/560B-560b-28-pin-progrmbl-ic-tester.htmll

caius2013-05-20 18:36:56