topic Re: Microcontroller MKM35Z512VLL7 : problems with 2 passes in the Reflow Oven? in Kinetis Microcontrollers

Microcontroller MKM35Z512VLL7 : problems with 2 passes in the Reflow Oven?

beste-ivan — Fri, 06 Jun 2025 14:50:38 GMT

Hello to everyone, i'm using th uC MKM35Z512VLL7.

I have a PCB where SMD components are mounted on the top LA and bottom LB sides.
On the TOP side LA, the MKM35Z512VLL7 microcontroller (IC1) is soldered. On the BOTTOM side, a very tall and heavy component is soldered (Relay RL2).
For issues with component (RL2), before we solder the microcontroller IC1 on side LA. Then after we solder component (RL2) on side LB.
Therefore, the microcontroller (IC1) will go through TWO stages in the SMD soldering oven.
The soldering profile is according to the IPC/JEDEC Standard J-STD-020 with T(max)=+260°C.
Can I have problems with the microcontroller if it goes through two cycles in the reflow oven?

thanks

Ivan

Re: Microcontroller MKM35Z512VLL7 : problems with 2 passes in the Reflow Oven?

beste-ivan — Thu, 12 Jun 2025 14:55:42 GMT

Hello everyone. Does anyone have comments or observations on the maximum number of welding cycles that the KM35 can tolerate (one or two)? Tks

Re: Microcontroller MKM35Z512VLL7 : problems with 2 passes in the Reflow Oven?

Veronika_techsupport — Fri, 13 Jun 2025 07:38:12 GMT

Hello @beste-ivan

Your request is currently in progress with responsbile team. Once I will receive response I will come back to you.

Thank you for your understanding and patience.

Best regards

Kind regards

Re: Microcontroller MKM35Z512VLL7 : problems with 2 passes in the Reflow Oven?

Veronika_techsupport — Wed, 18 Jun 2025 08:46:36 GMT

Hello @beste-ivan

could you please contact regarding your issue the point of sale/authorized distributor where you bought your parts? They will be able to check your ordered part and provide you further support.
Part is MSL 3 level. https://www.nxp.com/part/MKM35Z512VLL7, https://www.nxp.com/webapp/chemical-content/MKM35Z512VLL7.html
Thank you for understanding.

Best regards