Re: 7712 info

From: silverdr_at_wfmh.org.pl
Date: Thu, 18 Jun 2020 19:35:32 +0000
Message-Id: <9CF4974C-0E70-4EFF-9315-B3CC443AA384_at_wfmh.org.pl>
> On 2020-06-18, at 17:58, Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de> wrote:
> 
> Never seen any, but the numbers suggest HMOS-I as the process used.

True - I keep forgetting that these numbering schemes were valid across more than just "big" chips.

> There were also a few 87xx, meaning HMOS-II.
> 
> Here's the list of all that I have seen so far and what they can be replaced with:
> 
> 7707   7406 or 74LS06
> 7708   74LS257
> 7709   74LS258
> 7710   74LS138
> 7711   74LS139
> 7712   74LS08
> 7713   74LS04
> 7714   74LS02
> 7715   74LS373
> 65245  74LS245 (found in VIC-20)
> 8708   74LS257
> 8712   74LS08
> 8713   74LS04

Thanks!

> As for reliability... They did work, but it seems they don't age well. But that's OK after more than 30 years.

Might it be that I mixed something? Like.. RAM chips? I vaguely recall that MOS once made replacements for some otherwise common parts and that didn't go too well in terms of reliability. But can't be sure now if/what those were.

-- 
SD! - https://e4aws.silverdr.com/
Received on 2020-06-18 22:00:02

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