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Could they mean that the 1 is for MSL-1 and the 3 is for MSL-3:



Victor,



-----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-SAwCiq0p74rp1VjbJ2KwYhfTKtPqX

> x

> cTKsKZYCGGxofwy72prM2kZSCtGHPF0yQzQAytU_QVib44Cu-IBWW40DIyeoDrEQTNcmOi

> - 

> iuSYSbwoo9uOWkwMsYOgLpgGtKwmlenCQ2qMUd-IluZU4hJMiMAwmQlvALZwlfnfe9p0y

> 3-ada-0yro_rIN4ri1yG9W-ZAXgWcwuQI3v44ByozahmNdDu-

> pP83qBz7C1LvOj23z4u80ql5EFxO_M1uaNi8HamPkYIv5nst4jWzwTx9kLe

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> VdSo

> ATlHSFiOVsTCt_saqPqKUpH5GxSz0S4qHYNHBJVeAvg0srqjam2tMTKtH_4ep6RpxaZMva

> - 9pU_Ey3iAJVT9HvW2kqUcoDZQO-bB3n0i_E50WvzT7FtGb8AY1fX6J8wP7q1t6XJ

> 9Y4gX2enmlUGVq5roSzf_LM_4qzxpZ1mlezG7b5aZxH2oGmw_vefrS7sZbKNHTFjh_

> Gdgyz4FHrdsp4ysX9vdVTIZyEMa-IrUGN_7E6JEROsA7dEt5NZikg5mrq17ntQe8

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> -

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> 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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