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YShko.1
Associate III
December 27, 2022
Solved

What package size i need to chhose on stm32G070RB

Hey,

I am using the STM32G070Rb development kit for my project.

i downloaded from the CAD resources the cpu schematics.

However in the libary there are 3 types of packages

1.LQFP-64-M

2.LQFP-64-L

3.LQFP-64

what package i have on my development kit?

0693W00000Y6vFpQAJ.pngthanks

This topic has been closed for replies.
Nikita91
Nikita91Best answer
Lead II
January 1, 2023

The 3 footprint LQFP-64, LQFP-64-M, LQFP-64-L are for the same device package 10x10mm body and 12x12mm including pins. Take a good look at what is displayed by choosing "Detailed View".

Only the dimensions of the pads change.

Choose the one that best suits your application or your company's rules.

9 replies

AScha.3
Super User
December 27, 2022

choose exactly same size as in ds of STM32G070Rb .

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YShko.1
YShko.1Author
Associate III
December 27, 2022

HOW CAN I KNOW?

physically mesure the cpu?

or i can fund it in the data sheet?

AScha.3
Super User
December 27, 2022

shure - just read..

0693W00000Y6w28QAB.png

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YShko.1
YShko.1Author
Associate III
January 1, 2023

Thank you for your reply,

Where you can see this Package information?

Nikita91
Lead II
December 30, 2022

What CAD do you use?

With Diptrace there are variant for the same package: the size of the pads are different if you do manual soldering or machine soldering (machine can use smaller pads).

Nikita91
Lead II
December 30, 2022

I looked at the proposed footprints.

They are all for the same package, only the pads dimension change. You can see this selecting "Pin detail view". The _M variant is obviously for manual soldering.

YShko.1
YShko.1Author
Associate III
January 1, 2023

I downloaded the CAD for EAGLE from the recources section.

I think the soldering is done by machine.

How they have the same package? There are 3 diffrent sizes, Like @AScha.3​ mention in his comment

Nikita91
Nikita91Best answer
Lead II
January 1, 2023

The 3 footprint LQFP-64, LQFP-64-M, LQFP-64-L are for the same device package 10x10mm body and 12x12mm including pins. Take a good look at what is displayed by choosing "Detailed View".

Only the dimensions of the pads change.

Choose the one that best suits your application or your company's rules.