Is it pre-production part?  or new parts?  is it TQFP used as package  
for MEMS?  if it is, I would be careful.
jk
On Jul 10, 2018, at 11:33 AM, Gumpert, Ben wrote:

> Steve,
>
> I've seen multiple MSL ratings when the part is classified at  
> multiple reflow temperatures. The label on the packaging should  
> tell you which peak temperature the MSL is associated with so you  
> can see if it's adequate for your process.
>
> Ben
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
> Sent: Tuesday, July 10, 2018 11:05 AM
> To: [log in to unmask]
> Subject: EXTERNAL: [TN] MSL Rating question on Microchip device...
>
> 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=gPVv3S5fz9WS0muSSENj7rO6t8VXvQgK1rcMoyYTG0FvQlD0DIEzVjQKFnEXzjwd- 
> qWoH4WrGz915jp9zrn-G-x_qSIVtc8zbLug- 
> SAwCiq0p74rp1VjbJ2KwYhfTKtPqXxcTKsKZYCGGxofwy72prM2kZSCtGHPF0yQzQAytU_ 
> QVib44Cu-IBWW40DIyeoDrEQTNcmOi- 
> iuSYSbwoo9uOWkwMsYOgLpgGtKwmlenCQ2qMUd- 
> IluZU4hJMiMAwmQlvALZwlfnfe9p0y3-ada-0yro_rIN4ri1yG9W- 
> ZAXgWcwuQI3v44ByozahmNdDu- 
> pP83qBz7C1LvOj23z4u80ql5EFxO_M1uaNi8HamPkYIv5nst4jWzwTx9kLe371AdpR1Zad 
> e37d-Lbj994RtcoMlt-_tywF_Sm-fI_q- 
> cK0pdzb47WLG3M1qI1PK3dWAQdVdSoATlHSFiOVsTCt_saqPqKUpH5GxSz0S4qHYNHBJVe 
> Avg0srqjam2tMTKtH_4ep6RpxaZMva-9pU_Ey3iAJVT9HvW2kqUcoDZQO- 
> bB3n0i_E50WvzT7FtGb8AY1fX6J8wP7q1t6XJ9Y4gX2enmlUGVq5roSzf_LM_4qzxpZ1ml 
> ezG7b5aZxH2oGmw_vefrS7sZbKNHTFjh_Gdgyz4FHrdsp4ysX9vdVTIZyEMa- 
> IrUGN_7E6JEROsA7dEt5NZikg5mrq17ntQe8y7r5_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
>
> -- 
>
>
>
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