Re: Perplexing 64 addressing finding

From: Jim Brain <>
Date: Wed, 9 Aug 2017 08:56:22 -0500
Message-ID: <>
On 8/9/2017 2:38 AM, Francesco Messineo wrote:
> Hi,
> according to the datasheets, HCT08 is a few ns SLOWER than an LS08.
Sigh.  Thanks Francesco.  I need to hand in my credentials.  I read the 
sheets backwards (I read LS as 34nS, and HCT as 17, when they were both 
open in the window.)
> Are all unused inputs of the '08 tied to a supply rail?
Yep, but the above makes everything line up.  LS worked, wire works, but 
HCT (being slower yet), does not.


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Received on 2017-08-09 14:00:04

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