Hi,
I am very sorry for this. Yes, you are right.
This is mask set dependent part numbering when mask set of the device is inserted into a part number. It follows numbering of newer devices. This is standard for automotive qualified devices. If you order such device you will be sure you have the same mask set. A mask set defines an errata list. These device part number starts wit S. If our order the part starting with MC then you can receive device with any mask set on the stock. The transformation table between mask code and mas number is not presented so, I am sorry, you will have to ask and I’ll provide the table as presented bellow.
Devices:


Best regards,
Ladislav