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'Erasing the 16C622'
1997\03\07@122856 by Robert Drake

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Hi All
We are having major problems attempting to erase the 622, anyone
else had the simular problems. The eraser we use will clean a 71in about
20-30 minutes but the 622 needs over 1HOUR!!!

Any ideas,reasons,solutions

       Thanks

               Rob
--
Robert Drake

1997\03\07@154042 by Andy Kunz

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>We are having major problems attempting to erase the 622, anyone
>else had the simular problems. The eraser we use will clean a 71in about
>20-30 minutes but the 622 needs over 1HOUR!!!

Yeah, get a decent eraser.  Mine (from Digi-Key) erases a 71 in 2-5
minutes, I forget exactly.

Andy

==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
         Hardware & Software for Industry & R/C Hobbies
       "Go fast, turn right, and keep the wet side down!"
==================================================================

1997\03\07@222144 by Jeff King

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At 03:23 PM 3/7/97 -0500, you wrote:
>>We are having major problems attempting to erase the 622, anyone
>>else had the simular problems. The eraser we use will clean a 71in about
>>20-30 minutes but the 622 needs over 1HOUR!!!
>
>Yeah, get a decent eraser.  Mine (from Digi-Key) erases a 71 in 2-5
>minutes, I forget exactly.
>
>Andy
>

My DigiKey eraser erases a 16C56 in about 5 minutes. A 16C622 takes at
least 20-30 minutes. MicroChip tells me this because of the smaller
cell size on the 622.

On the other hand, my larger (and much more expensive) production eraser
wouldn't even erase a 622 after a hour. Does a good job on EPROM's though.
Guess the 622 is just a hard part to erase.
Regards,

------------------------------------
| Jeff King      Aero Data Systems |
| spam_OUTjeffTakeThisOuTspammich.com  P.O. Box 510895   |
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1997\03\10@032723 by Dag Bakken

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> Hi All
> We are having major problems attempting to erase the 622, anyone
> else had the simular problems. The eraser we use will clean a 71in
> about 20-30 minutes but the 622 needs over 1HOUR!!!
> Any ideas,reasons,solutions

I have one of those cheap UV erasers, and it erases any Microchip part in a
matter of minutes.  I'm not quite sure how much time it uses, because I have
never encountered an unerased chip.  I think the timer is set to 10 minutes (or
something in that area).  The eraser is constructed like a bed where you put the
chips upside down.  This ensures that the chip is always very close to the UV
source no matter the size/shape of the chip.  It's about 2mm between the source
and the chip, and the effect is 4W.
I have never had any problems with erasing.


-Dag S

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