Re: Micro-PET

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Wed, 30 Dec 2020 17:41:32 +0100 Message-ID: <f8983a16-cd21-278f-f6c6-fac6fec68cc5_at_laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 12/30/20 5:15 PM, ruud_at_Baltissen.org wrote:
> Hallo Gerrit,
> 
> 
>> You can get faster SRAM in DIP. Check older 486 boards
>> for part numbers, 25ns are doable.
> 
> You are correct but there is a big BUT. I have seen a lot of old
> 486s and the biggest cache SRAM I found so far was 128 KB. And even
> these are rare. 64 KB ones can be found by the dozen but then you
> will need so many that you are better of with SMD ones, IMHO.

When looking on Ebay I was able to find 512Kx8 SRAM with 15ns in PLCC. 
Not quite DIP anymore, but you get get sockets for this kind.

512Kx8 in DIP seems to max out around 45ns.

  Gerrit