I is for industrial, which means it is guaranteed to run from -40C to +85C.
Otherwise it is a commercial part which is guaranteed (IIRC) -20C to +70C.

The L stands for low power, which means it is guaranteed to work down to a
lower voltage, which means it will use less power (good for battery-powered
devices).

For just about any semiconductor manuracturer, the various odd letters are
usually explained in detail toward the end of the data sheet.  Occasionally
it is on the first page or two, if they think that's the feature that will
sell the chip.

> -----Original Message-----
> From: Rudy Rudy [mailto:piclist@RUDYRUDY.COM]
> Sent: Monday, December 03, 2001 1:33 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]: Difference between 16F628-20/P-ND and
> 16F628-20I/P-ND???
>
>
> Ooops!  PIC should be all caps!
>
> Does anyone know the difference between 16F628-20/P-ND and
> 16F628-20I/P-ND?  One with the 'I', the other one without it.  I saw
> this in Digikey website.
>
> I am a little confused because the one with the 'I' is a little more
> expensive than the other, and I can't seem to find any difference
> whatsoever in the description of the 2 chips.  I have checked
> microchip
> website and the spec sheet, and I can't find anything.
>
> In the spec sheet, it says that there are 2 types: 16F and 16LF (where
> the LF version is the one that'll work at lower supply
> voltage).  But I
> don't think this is it though!
>
> Please enlighten me if anyone knows what the 'I' stands for.
> Thank you
> very much!
>
>
>  Rudy
>
> --
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>

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