The term COD (Country of Diffusion) refers to the country where the semiconductor wafer was fabricated ("diffused") and is a key piece of traceability and customs information. For the STM32F765IGT6 microcontroller, the specific COD is not encoded in the standard part number itself . The part number tells you the product line, core, features, package, and temperature grade, but not the fab location. To find the COD for your specific chip, you need to look at the marking on the device itself or its packaging. Here’s how to interpret it: 1. Check the Top Marking on the Chip The line below the main part number (STM32F765IGT6) contains the traceability information. It typically follows this pattern: XXXXXXXX YWWZZZ XXXXXXXX : A unique alphanumeric traceability code. Y : A single letter representing the Assembly Base (final packaging and test site). This is the closest official indicator of COD. WW : The two-digit week of manufacture. ZZZ : A multi-character lot code. The critical letter is Y (the Assembly Base code). For STMicroelectronics, common codes include: M : Malaysia (the most common for STM32) C : China K : Korea P : Philippines T : Taiwan V : Singapore A : Thailand (or other, less common sites) Example: A marking ending with M234 means the chip was assembled/tested in Malaysia in week 23 of a given year. 2. Check the Packaging Label The outer box, tape, or reel will have a label that often states the COD explicitly in text, for example: COO: MALAYSIA Country of Origin: CHINA ASSEMBLED IN MALAYSIA This is the most straightforward and legally binding declaration for customs. 3. Datasheet and Official Documents While the datasheet doesn't give the COD for a specific unit, it confirms the possible assembly sites. ST's official Product Qualification or Packaging Information documents list the qualified manufacturing and assembly sites for a product family. Summary for STM32F765IGT6: Part Number: STM32F765IGT6 (ARM Cortex-M7, 2MB Flash, LQFP176 package). Most Likely COD: Malaysia is ST's primary assembly/test site for STM32 devices. China and the Philippines are also very common. How to Know for Sure: You must look at the marking on the physical chip (the assembly base code letter) or the shipping packaging label . If you have the physical chip or its original packaging, that is the only way to provide the exact COD. If you are creating a Bill of Materials (BOM) or doing pre-purchase research, it is standard to list the primary source (e.g., "Malaysia") with the note that it is subject to change based on ST's manufacturing allocation.
