HA8-3 Chipset on ebay...

[Joe Travis N6YPC]

I'm curious if anyone in the group has purchased and used the HA8-3 chipset from ebay?  Having experienced IC fakery with ICs from China, I'd like to know if these are good.

https://www.ebay.com/itm/114968700310?ssPageName=STRK%3AMEBIDX%3AIT&fromMakeTrack=true

Thanks,

Joe Travis n6ypc

[Glenn Roberts]

I don’t think this was the original source of the chip (it came from a friend) but I did have a problem with an AY-3-8910 with the Microchip branding just like the one in the picture.  The problem was one of the parallel I/O port outputs was non-functional.  Purely guesswork on my part but I don’t think this was so much a “fake” chip as one that failed QA testing but was somehow not disposed of properly. It’s increasingly a hazard we face in the world of “through hole” legacy chips…

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[Terry Smedley]

Joe:

This seller created the listing for me last September when I was finding sources for the HA-8-3 board components.  I bought three sets.  The AY, TMS, ADC, and MUX chips weren't fake in the sense that they worked as expected.  But I don't believe they are new - to my eye they appeared to have been "refurbished" - the top surface of the chips appeared to have been etched clean and the imprint is just a little too pristine.   I never tried the 4116s as we had a static RAM solution for the HA-8-3 early on in development.

Glenn's comment about the AY:  This chip has very low output drive capability on the digital ports (datasheet says 1 TTL load), and I encountered several (including the one that I sent to Glenn) that had one or or more blown output lines.  That is the reason that the 74LS07 was added to the new board.

FWIW

Terry

[Joseph Travis]

Thanks Terry & Glenn.  I looked at the number of sets that had been sold and figured someone from the group had to have bought some.  I guess I'll bite.

GI (General Instrument) was the original manufacturer of the AY-3-8910.  I used to work across the street from them at AMCC when there was a mass exodus to GI.  I had never seen and am suspicious of the MicroChip version.  Also because it was Motorola (less than a mile away) that bought GI. 

BR,

Joe

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[Dave McGuire]

On 9/6/22 22:56, Joseph Travis wrote:
> GI (General Instrument) was the original manufacturer of the AY-3-8910.
> I used to work across the street from them at AMCC when there was a mass
> exodus to GI.  I had never seen and am suspicious of the MicroChip
> version.  Also because it was Motorola (less than a mile away) that
> bought GI.

If I'm not mistaken, back in the mid-1980s, quite a while before
Motorola bought GI, Microchip bought GI's chip division. Microchip
supplied many formerly-GI parts, and still do.

-Dave

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Dave McGuire, AK4HZ
New Kensington, PA

[Joseph Travis]

That could be, I just don't remember that.  Microchip and Atmel had offices about a mile away too.  Back then we (at AMCC) were pushing the 10 Gbit barrier and a few years later were doing 40+ Gbits.  We used to say we were "on the bleeding edge" of technology, it was exciting times until the dotCom crash.

BR,

Joe Travis n6ypc

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[Dave McGuire]

Nice! Yup, here it is:

http://ww1.microchip.com/downloads/pr_archive/en/en013045.pdf

So I wasn't quite right: GI didn't sell their IC division to
Microchip Technology; GI's IC division was spun off and *became*
Microchip Technology in 1987. So there's no need to be suspicious. ;)

Microchip makes a whole lot more than PIC microcontrollers, though
they only seem known to hobbyists as the source of PIC microcontrollers.
The earliest PICs say "GI" on them; PICs date back to the mid-1970s!

-Dave

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