[coco] 6309 speed

[Paul T. Barton]

In the manual for Hitachi 6309/E chips,
it states that you must put in 50-100 ohm
resistors in the data path and address lines
because they glitch. address lines take
50 or 100 and date lines the other,
can't remember which.

Paul - idezilla

--- Gene Heskett <gene.heskett at verizon.net>
wrote:

> On Wednesday 03 August 2005 10:34,
> jdaggett at gate.net wrote:
> >Roy
> >
> >The CMOS process that the 6309 was most likely
> done on is prior to
> >high speed or HCMOS days. Outside a
> potentential die shrink
> >during production, I doubt much other changed.
> >
> >Most likely done on 9V or 11V CMOS and at 5
> VDC, I doubt the
> >speed can exceed much beyond 5 MHZ or so. Then
> that will need
> >proper heat sinking. The main problem in heat
> is the actual plastic
> >dip package itself. Plastic is not a great
> conductor of heat.
> >
> >james
> 
> I don't recall ever seeing a regular cmos
> transition in less than 25 
> or 30 ns, and that took 28 volts on a 15 volt
> rated chip to do that.  
> I was using it as an edge generator in a tv
> character generator.  It 
> ran about 20 degrees above ambient, and did it
> 24/7 for several years.
> 
> The 63C09's that I have can muster up edges on
> most pins as fast as my 
> scope can see, 10 ns as its only a 100mhz dual
> trace.  That sort of 
> speed isn't old time plain cmos by quite a long
> row of apple trees.
--snipped--



		
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