Re: Help Identifying three IC's

Rusty wrote:
Hi All,

Is there a machine which you can plug in a 16 pin IC and it will tell
you what it is/number is? I have a circuit board with three 74lS????
ics which have had the numbers sanded off the top and I need to replace
them as they are faulty.

Thanks

Tim

When I was really desperate to identify a house-numbered IC, I removed
the packaging to expose the silicon chips. Then I would inspect them
with a metallurgical microscope. They often had the manufacturer's
logo and the standard catalog part number easily readable somewhere
around the periphery of the chip.

There are some nasty chemicals that will dissolve epoxy without hurting
the silicon, but I just used brute force. If you do it this way, first
get some practice on some other ICs.

.

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