Post by thread:PIC16F877 Rev marking?

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 First I thought the first one is rev B ("BSL" after date code) But then I see on the PLCC "SBN" after date code. Still a B involved, but in another position... Looks like S revision... Strange! Or is the characters after the date just manufacturing lot etc, and theese are not 'A* nor B revisions, but bug free (supposedlu) ones? Thanks in advance /Morgan

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. Unless you (or Microchip) made a mistake, they don't match your F877 code, unless you change the BSL to SBL. -- Best regards Tony http://www.picnpoke.com Email spam_OUTsalesTakeThisOuTpicnpoke.com

Tony Nixon wrote: {Quote hidden}>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. /Morgan

Morgan, > >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 i t should be SBL. I'll back you up. I have a couple of 16F877 devices in Plastic 40 Pin DIP. I wondered the same thing . . . One has 9936SBW and the other 9924BSL in a larger bolder print. (I got this one (BSL) from a batch from Newfound Electronics) Regards, Craig Peacock

On Tue, 23 Nov 1999 09:45:54 +0100, Morgan Olsson wrote: {Quote hidden}>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