On Tue, 23 Nov 1999 09:45:54 +0100, Morgan Olsson wrote:

>Tony Nixon wrote:
>>Morgan Olsson wrote:
>> >
>> > I m uncertain how/where to read the revision
>> >
>> > I have some DIL40 marked
>> >
>> > 16F877-20/P
>> > 9924BSL
>> >
>> > and some PLCC
>> >
>> > PIC16F877-04/L
>> > 9925SBN
>>
>>99 = year
>>25 = week code (week of january 1 is week 01)
>>S = 6 inch wafer line
>>B = Mask revision number
>>N = Assembly code of the manufacturing plant.
>>
>>These markings are explained on page 179 of the 16F8XX data sheet.
>
>Oh, thanks.
>
>>Unless you (or Microchip) made a mistake, they don't match your F877
>>code, unless you change the BSL to SBL.
>
>Strange, the DIL40 really reads "BSL"
>As revision S is not here yet..., I believe Microchip did wrong marking, and it
 should be SBL.
>

I have a pair of PIC that must be at mask rev H.

parts have on them:

PIC16F877-20/P
9943MHS

Others have the follwing and must be mask rev 3.

PIC16F877-20/P
9916B3P

I also have some 874's with

PIC16F874-20/P
9927SBW

These, unfortunately, look like Rev B parts!


Dan