I have been messing around with the Picmicro's for about 20yrs now and only come across One project or suggestion on using the Micro processor supervisory reset IC, (DS1233)?
Is it overlooked? or just considered not necessary anymore?

 

hi Max,
I used these earlier versions, worked well on mobile environments.
E

 

These are just 3pin versions?

 

I thought the brown-out reset feature made them unnecessary on PICs.

 

This was in a 30yr old design that I saw it in.
16C84.

 

This was in a 30yr old design that I saw it in.
16C84.

The PIC16c84 was well documented how to avoid brownout errors (by forcing a reset) but lots of voltage supervisor chips did exist (still exist?).

 

These are just 3pin versions?

There is a wide variety of packages and functionality to choose from. Like many design problems it would help if you could articulate your requirements.

 

There is a wide variety of packages and functionality to choose from. Like many design problems it would help if you could articulate your requirements.

Read the question, he doesn't have a "requirement". He simply saw one in an old design and asked if supervisor chips in old designs are no longer needed in modern PIC (newer than 16c84 chips).

 

I had been looking at bringing an older design up to scratch and modernize it a little, it was just out of interest I mentioned their insistence on the DS1233.
I had never come across it before.
I am upgrading the original to a 18F series.

 

I had been looking at bringing an older design up to scratch and modernize it a little, it was just out of interest I mentioned their insistence on the DS1233.
I had never come across it before.
I am upgrading the original to a 18F series.

Well, the PIC series usually provides many of the same things as a supervisory circuit, so I might hesitate to incur the extra expense, unless you can convince yourself that it provides a functionality the basic processor does not. Make the argument and we'll shoot holes in it if possible.

 

Well for a $ or so difference between the usual cap and a couple of resistors, there is very little in cost, especially for a one-off.
And the footprint is less.