Re: 2764 -> 2364/68764 adapter

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Thu, 14 Jul 2016 08:59:40 +0200 Message-ID: <5787385C.8040101@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 07/13/2016 11:45 PM, Clockmeister wrote:
>
>
> On 13/07/2016 8:48 PM, Gerrit Heitsch wrote:
>>
>> A simple OR gate (74LS32 for example) will tie _OE and _CE together
>> and produce the correct signal for a 2364.
>>
>
> I usually construct a simple OR gate using diodes and a resistor. Hasn't
> failed me yet.

Yes, but it uses a pulldown resistor. I don't like using those since you 
depend on the input not having an internal pullup. If it has one, the 
resulting voltage divider might put the line into illegal territory.

  Gerrit

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