windowed MC68HSR705J1ACS ?

From: Richard Erlacher <edick_at_idcomm.com>
Date: Tue Jan 22 09:26:18 2002

These parts have been discontinued by Motorola for about 5 years, so I'm not
surprised you're having difficulty finding them. That "SR" in the part number
disturbs me somewhat as well, as it's not on any of the windowed parts I have,
and I don't think they made two 20-pin windowed parts. I'm also not sure what
the MC68HC701J1A has to do with any of this. The '701 is a much older part
that never came in a 20-pin version, and, I don't think ever came in an 'HC
version either.

Perhaps the nomenclature is screwing up your search. I'm not sure what the
correct part number for the ceramic windowed package is, but I'm not at all
sure that MC68HC705J1ACS is it. I could go look, I suppose, but it's an
easter-egg hunt, so it might take some time. If you find the right
parts-search engine, it will turn up a supply of these parts, but not at
"cheap" prices. I found 'em a couple of weeks back, after getting a spam from
a "new" parts-search site. I have them look for Z84C0020 and MC68HC705J1A
just to see what they turn up, and I was surprised to find that they had
pointers to supply of both, not that I want to buy either.

If you're really determined to use the 20-pin part, there are a couple of
current 'HC805 and 'HC908 parts that might work for you. Mot has been trying
quite actively to kill off the 'HC05 series, but it seemingly refuses to die.

I remember the MOT guys discouraging me from using the 'HC705K1 (16 pins) back
in '94. They didn[t have a 16-pin replacement from the 'HC805 series at the
time so I used it anyway, but I also bought into the 20-pin part, since that
was still available. I've come to regret that, however. It didn't matter,
since management killed the project, but that was the last time I bought any
of the MOT MCU's. My experience has been that they don't tell the truth about
supply, and they won't support you at volumes under 100K parts per week. They
use distributors who won't supply you at levels like 200 per week, either, so
most of my clients are screwed with MOT parts. Consequently, I haven't used,
or even considered, a MOT part of any sort since '94.

Dick

----- Original Message -----
From: "Tom Uban" <uban_at_ubanproductions.com>
To: <classiccmp_at_classiccmp.org>
Sent: Monday, January 21, 2002 10:59 PM
Subject: Re: windowed MC68HSR705J1ACS ?


> I'm after the 20-pin DIP ceramic windowed part vs. the OTP part. The part
> number that I indicated (MC68HC705J1ACS) should be the one which matches
> what I am looking for. No one seems to have them, including the places
> that you reference, at *any* price.
>
> --tom
>
> At 09:10 PM 1/21/02 -0700, you wrote:
> >I'm not at all convinced I know what you're after. The 20-pin 68HC705
parts
> >with which I'm familiar are the MC68HC705J1A which comes in a number of
> >packages, one of which is the ceraminc windowed part. I don't think these
> are
> >unavailable in distribution, though I've never gotten one for less than
$60.
> >I think the last place I saw them for sale was Future-Active electronics.
> >www.future-active.com, though things change, and a quick look didn't show
> that
> >part. ISTR that DigiKey had the windowed parts too at one time.
> >
> >Dick
> >
> >----- Original Message -----
> >From: "Tom Uban" <uban_at_ubanproductions.com>
> >To: <classiccmp_at_classiccmp.org>
> >Sent: Monday, January 21, 2002 7:11 PM
> >Subject: windowed MC68HSR705J1ACS ?
> >
> >
> >> I am looking for a source for a MC68HSR705J1ACS Motorola 20 pin DIP
> >> with window (erasable) MC68HC701J1A microprocessor. I have only been
> >> able to find the OTP versions, but would like to find an erasable
> >> one for development. Does anyone know of a source, or have one (or 2)
> >> that you would be willing to sell me?
> >>
> >> --tnx
> >> --tom
> >>
> >>
> >
> >
> >
>
>
Received on Tue Jan 22 2002 - 09:26:18 GMT