Kinetis MicrocontrollersのトピックFRDM-KL25Z miss U7 MMA8451Q

FRDM-KL25Z miss U7 MMA8451Q

wangjianbing — Mon, 29 Dec 2025 02:24:48 GMT

The FRDM-KL25Z is missing the U7 MMA8451Q chip in the new version. This chip is an important component for this board, but I don't understand why it was removed. Because of this, I can't use the board, yet the price has increased even though the chip has been removed. I need the old board. Please check, you removed the chip but didn't change the board model number, so when I ordered, I expected the old board, but I received the new one.

Re: FRDM-KL25Z miss U7 MMA8451Q

Alice_Yang — Mon, 29 Dec 2025 07:57:35 GMT

Hello @wangjianbing

Thank you for contacting us. I’m sorry, we only have the new version (Rev.I) available, and the old version will no longer be produced. As noted on the FRDM-KL25Z homepage: “MMA8451Q accelerometer not soldered on Rev.I | MMA8451Q is no longer recommended for new designs.”

You may try contacting distributors or other third-party platforms to check if they still have stock of the previous version.

Thank you for your understanding.

Alice

Re: FRDM-KL25Z miss U7 MMA8451Q

bobpaddock — Mon, 29 Dec 2025 14:39:40 GMT

NXP sold all existing stock of most of their Accel/Gyros to Rochester Electronics several years ago. ST or Analog Devices is a better place to look for MEMs today.

If you are starting a new design the Kinetis line is not the line to do it in.

https://www.rocelec.com/global-search/MMA8451Q

Re: FRDM-KL25Z miss U7 MMA8451Q

wangjianbing — Wed, 31 Dec 2025 02:36:02 GMT

Ok. i see. I have an issue please check it how to solution it. This version change is only removed U7? If i solder this U7 MMA8451Q in board. whether can use it like as older version? Now I need an solution to disposal it. Thanks!