[Elecraft] Re: Help, I think I've killed my K1

Fri Feb 21 20:34:15 2003

The 7.5V spec means the device can survive that much voltage without damage
but it's only guaranteed to work like a microprocessor up to 6.0V.

The 78L06 can be as much as 6.15V and there are a lot of  K1s and K2s that
get by with that, so I wouldn't be surprised it yours works at 6.2V.  For
non-critical applications, that's okay, but sometimes the problems that are
caused by the voltage being out-of tolerance can be very tough to determine.
"Is it the micro itself or is it some random input causing the problem?"

I just mentioned the possibility, so if you do see irregular operation, you
can switch back to the 78L06.

73/ Bob - AG5Q

----- Original Message -----
From: "Morrow, Michael A." <[email protected]>
To: "'Bob - AG5Q'" <[email protected]>; "John Webster" <[email protected]>;
<[email protected]>
Sent: Friday, February 21, 2003 7:13 PM
Subject: RE: [Elecraft] Re: Help, I think I've killed my K1

>
> Bob / AG5Q wrote:
>
> > The NTE-988 is speced at 6.2V rather than 6.0V like the ZR78L06.
> >
> > This will mean running the 16C77 at 6.2V which is slightly
> > higher than it's spec limit of 6.0.
>
> I think it would be OK.  The max. voltage rating spec for 16C7x devices on
> Vdd above Vss (logic ground) is 7.5 volts.
>
> 73,
> Mike / KK5F
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