What is the difference between STM32F100RBT6 and STM32F100RBTB? What is the meaning of the ending 'B'? Someone told me that the STM32F100RBT6 is obsolete. Are there any problems to be expected by exchanging the devices? Best regards Peter

[PHopp.1]

..

[TDK]

The datasheet lists the different part options. Doesn't seem like STM32F100RBTB is valid. Where do you see it? Unlikely that any part starting with STM32F100RBT would be incompatible with each other, temperature range aside.

https://www.st.com/resource/en/datasheet/stm32f100cb.pdf

[PHopp.1]

I'm sorry, there is a digit for temperature missed: STM32F100RBT6B.

Regarding the datasheet the last 'B' is an "internal Code", whatever it means.

[Tesla DeLorean]

Helps not to be dyslexic

STM32F100RBT6B

https://www.mouser.com/ProductDetail/STMicroelectronics/STM32F100RBT6B?qs=eF7XX6ARXFHMlfWFz2g6gg%3D%3D

These are antiquated parts, but if my recollection is good some where along the line ST changed the die they used for the Value Line parts, so if you read the DEV_ID registers you'll see they used an IC for a more functional F103 part than they started with.

The Value Line F100 parts use the same die as F103 parts with functions disabled or untested. ie didn't test USB, tested only a fraction of the FLASH/RAM, and then labelled as good-enough to meet the price/functionality targets for the part# they were selling it as.

Read the DEV_ID, and make sure you have the appropriate FLASH PAGE size when working with a specific DIE. I don't know this is different, but it would be on top of my checklists when supporting both parts in the field/production.

[Tesla DeLorean]

RM0041 for F100 parts, RM0008 for F10x

[waclawek.jan]

Omitting marketing material (which often strips suffixes), I can't find any mention of STM32F100RBT6 (i.e. without the B suffix) back to 2010. I'd say, it might've been an early model, soon surpassed by an update.

JW

[PHopp.1]

https://eu.mouser.com/Search/Refine?Keyword=stm32f100rbt6

There is no mouser part no and they don't have it on stock. It must be really an old part. I will simply replace it in my bom.

[waclawek.jan]

https://community.st.com/s/question/0D53W00000trNfsSAE/is-there-any-difference-between-stm32f100c8t6b-and-stm32f100c8t6