Any idea if Microchip will support 3.3V on MCUs?

Pavel Kolinko · Joined: 15 Mar 2005 Posts: 10

Microchip dsPic supports 3.3V.

However I was wondering if anyone knows
whether Microchip has plans to support 3.3V in MCUs.

I looked for 3.3V MCUs on Microchip website, but it doesn't seem like they have any.

Thanks in advance for your help.
Pavel

newguy · Joined: 24 Jun 2004 Posts: 1911

The LF processors are low voltage capable. Some are able to run as low as 2.0 V (I think). For example, the 18F452 runs at 4.2 - 5.0 V, while the 18LF452 will run down to something in the neighbourhood of 2 or 3 V. I'm too lazy to look up the exact specs - check microchip's website again.

Pavel Kolinko · Joined: 15 Mar 2005 Posts: 10

Thanks!
I found the LF parts that I need.

MikeValencia · Joined: 04 Aug 2004 Posts: 238 Location: Chicago

Pavel,

Just make sure that you have Brown-Out Reset DISABLED. Otherwise, you'll never get these things to run! I guess the feature is in there because these same 3.3V chips can still run at 5V.

MGP · Joined: 11 Sep 2003 Posts: 57

You also may have problems with low voltage in-system programming since you can't do a bulk erase at Vdd less than 4.2V. You need to be able to do a bulk erase if you want to change fuse settings, since a bulk erase is the only way to erase the existing fuse settings.

kender · Joined: 09 Aug 2004 Posts: 768 Location: Silicon Valley

ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands