> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu]On Behalf
> Of William "Chops" Westfield
> Sent: Thursday, December 23, 2004 5:39 PM
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC]: Is 628A more sensitive to noise than 628?
> 
> 
> 
> On Dec 23, 2004, at 12:42 AM, Bala.Chandar@aventis.com wrote:
> 
> > I should clarify a few points. I replaced the PIC, not 
> because the old 
> > 628
> > was dead. I merely wanted to try out the newly bought 628A. Since I 
> > found
> > it highly sensitive to noise resulting in unsatisfactory 
> operation, I 
> > put
> > the original 628 back and now the circuit is working perfectly, as 
> > before.
> 
> Have you tried OTHER 628s?  Perhaps the one you are using 
> happens to be
> particularly insensitive...
> 
> BillW

Hi BillW,

My guess is that 16F628 is inherently more immune to noise than 16F628A is. (Does the die size have anything to do with this?) I would like to know others's experience with 628A. But, you have a point. I will use the other 628s I have for the same circuit and report my finding.

Regards,
Bala


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