I would call your Future rep and ask, I guess. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Tom Brendlinger Sent: Tuesday, July 10, 2018 11:08 AM To: [log in to unmask] Subject: Re: [TN] MSL Rating question on Microchip device... Odin, I think you're correct in a general case, but in this case Future lists it as MSL1/3 but Microchip lists it as 3... I can't find any Microchip docs listing it as 1/3. Perhaps they previously classified it as MSL1/3 and have since changed it to 3. t On Tue, Jul 10, 2018 at 12:04 PM, Stadem, Richard D < [log in to unmask]> wrote: > It is NOT an error. > The component manufacturers simply had an original classification for > handling based on a leaded process (MSL-1), where the parts were reflow > soldered and reworked using Sn63 solder profiles prior to RoHS. > Because there were so many parts that were qualified per IPC-020 as MSL-1 > out in the market when RoHS was incorporated, the component manufacturers > and distributors had no way of going back to re-mark the original part > packaging to MSL-3 or higher if unleaded solder and its corresponding > hotter profiles were used. So they simply updated their part prints from > MSL-1 to MSL-1/MSL-3, with the understanding that the user would handle the > parts as a level 3 if they were going to go through the hotter lead-free > processing. > In other words, the parts would be fine if leaded (max reflow temp around > 220C) was used, but special precautions to keep the parts dry (MSL-3) were > required at the hotter profiles. > Also, some component manufacturers upgraded their components so they could > withstand the hotter processing temperatures, but they did not want to pass > on those Level 3 requirements to users who intended to process using leaded > temperatures, so they called them MSL-1/MSL-3, thus allowing no special > handling for those who were going to solder with a leaded process. > Odin > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Tom Brendlinger > Sent: Tuesday, July 10, 2018 10:42 AM > To: [log in to unmask] > Subject: Re: [TN] MSL Rating question on Microchip device... > > Hi Steve, > I think that 1/3 is an error. Microchip only defines their criteria for > MSL-1 and MSL-3: > https://www.microchip.com/wwwproducts/Rohs/ > > This report lists pretty much all of their QFPs as being MSL-3: > http://ww1.microchip.com/downloads/en/EnvironmentalInformation/ > Package%20Qualification%20Summary%20report%205_15_18.pdf > > T > > On Tue, Jul 10, 2018 at 11:05 AM, Steve Gregory <[log in to unmask]> > wrote: > > > Hi All, > > > > I just ran across something that was brought to my attention about the > MSL > > rating for a Microchip TQFP80 part, PN# PIC24FJ256GA108-I/PT > > <https://analytics.supplyframe.com/trackingservlet/track/?r= > > gPVv3S5fz9WS0muSSENj7rO6t8VXvQgK1rcMoyYTG0FvQlD0DIEzVjQKFnEX > > zjwd-qWoH4WrGz915jp9zrn-G-x_qSIVtc8zbLug-SAwCiq0p74rp1VjbJ2KwYhfTKtPqXx > > cTKsKZYCGGxofwy72prM2kZSCtGHPF0yQzQAytU_QVib44Cu-IBWW40DIyeoDrEQTNcmOi- > > iuSYSbwoo9uOWkwMsYOgLpgGtKwmlenCQ2qMUd-IluZU4hJMiMAwmQlvALZwlfnfe9p0y > > 3-ada-0yro_rIN4ri1yG9W-ZAXgWcwuQI3v44ByozahmNdDu- > > pP83qBz7C1LvOj23z4u80ql5EFxO_M1uaNi8HamPkYIv5nst4jWzwTx9kLe > > 371AdpR1Zade37d-Lbj994RtcoMlt-_tywF_Sm-fI_q- > cK0pdzb47WLG3M1qI1PK3dWAQdVdSo > > ATlHSFiOVsTCt_saqPqKUpH5GxSz0S4qHYNHBJVeAvg0srqjam2tMTKtH_4ep6RpxaZMva- > > 9pU_Ey3iAJVT9HvW2kqUcoDZQO-bB3n0i_E50WvzT7FtGb8AY1fX6J8wP7q1t6XJ > > 9Y4gX2enmlUGVq5roSzf_LM_4qzxpZ1mlezG7b5aZxH2oGmw_vefrS7sZbKNHTFjh_ > > Gdgyz4FHrdsp4ysX9vdVTIZyEMa-IrUGN_7E6JEROsA7dEt5NZikg5mrq17ntQe8 > > y7r5_MjRGjrWr9d7d57c8NJ-HE_WJMCK9KvwQMbI2rzs_fn0ogzAshEeM8su_nJNSXQoJ6- > > WVWH9LR26AGY4y0d3PuCaOSBGsxFFiaSHOaBnl8Zc4tVZjXxT68gr9bJ8R3- > > PsNm7SjxGiIymxAijZ7Qb4quJc> > > the part came in from Future and they put a MSL1 label on it and the > > package wasn't sealed. One of our more knowledgeable technicians wanted > to > > double check the rating because he knows that QFP's are normally MSL3 or > > higher. The Digikey page calls this a MSL3 part, but if you go to Avnet's > > page it gives this a 1/3 MSL rating...what is that? I have never heard > of a > > 1/3 MSL rating. I have also looked at the 305-page datasheet and can't > find > > a MSL rating in the Microchip documentation. Has anybody ever seen this > > before? > > > > Steve > > > > -- > > Steve Gregory > > Kimco Design and Manufacturing > > Process Engineer > > (208) 322-0500 Ext. -3133 > > > > -- > > > > > > > > This email and any attachments are only > > for use by the intended > > recipient(s) and may contain legally privileged, > > confidential, proprietary > > or otherwise private information. Any > > unauthorized use, reproduction, > > dissemination, distribution or other > > disclosure of the contents of this > > e-mail or its attachments is strictly > > prohibited. If you have received > > this email in error, please notify the > > sender immediately and delete the > > original. > > >