Data Sheet

1.1 Product marking
The sticker located on the top or bottom side of the PCB board shows the information about product identification
such as board reference, revision, and serial number.
The first identification line has the following format: “MBxxxx-Variant-yzz”, where “MBxxxx” is the board reference,
“Variant” (optional) identifies the mounting variant when several exist, "y" is the PCB revision and "zz" is the
assembly revision: for example B01.
The second identification line is the board serial number used for traceability.
Evaluation tools marked as “ES” or “E” are not yet qualified and therefore not ready to be used as reference
design or in production. Any consequences deriving from such usage will not be at ST charge. In no event, ST will
be liable for any customer usage of these engineering sample tools as reference designs or in production.
“E” or “ES” marking examples of location:
• On the targeted STM32 that is soldered on the board (For an illustration of STM32 marking, refer to the
STM32 datasheet “Package information” paragraph at the www.st.com website).
• Next to the evaluation tool ordering part number that is stuck or silk-screen printed on the board.
Some boards feature a specific STM32 device version, which allows the operation of any bundled commercial
stack/library available. This STM32 device shows a "U" marking option at the end of the standard part number
and is not available for sales.
In order to use the same commercial stack in his application, a developer may need to purchase a part number
specific to this stack/library. The price of those part numbers includes the stack/library royalties.
1.2 Codification
The meaning of the codification is explained in Table 2.
Table 2. Codification explanation
NUCLEO-XXYYRT
NUCLEO-XXYYRT-P
Description Example: NUCLEO-L452RE
XX MCU series in STM32 Arm Cortex MCUs STM32L4 Series
YY MCU product line in the series STM32L452
R STM32 package pin count 64 pins
T
STM32 Flash memory size:
• 8 for 64 Kbytes
• B for 128 Kbytes
• C for 256 Kbytes
• E for 512 Kbytes
• G for 1 Mbyte
• Z for 192 Kbytes
512 Kbytes
-P STM32 has external SMPS function No SMPS
NUCLEO‑XXXXRX NUCLEO‑XXXXRX‑P
Product marking
DB2196 - Rev 14
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