STM32U3 in STM32 Family
The STM32U3 series by STMicroelectronics represents a specialized branch of the ultra-low-power MCU portfolio, leveraging the Arm Cortex-M33 core with TrustZone technology. Operating at 96 MHz, these microcontrollers integrate 2 MB of Flash and 640 KB of RAM to handle complex workloads while maintaining strict energy efficiency. The series introduces advanced features like I3C interfaces, Integrated Switched Mode Power Supplies (SMPS) for optimized power conversion, and Hardware Secure Prime (HSP) to meet modern IoT security and power demands.
Variants in This Sub-Family
| Part Number | Difference | Stock |
|---|---|---|
| STM32U3C5CIT6 (STMicroelectronics) | CIT6 | 100 |
| STM32U3C5CIU6Q (STMicroelectronics) | CIU6Q | 100 |
| STM32U3B5CIU6Q (STMicroelectronics) | B5CIU6Q | 100 |
| STM32U3B5CIU6 (STMicroelectronics) | B5CIU6 | 100 |
| STM32U3C5CIT6Q (STMicroelectronics) | CIT6Q | 99 |
| STM32U3C5RIT6 (STMicroelectronics) | RIT6 | 98 |
| STM32U3C5RIT6Q (STMicroelectronics) | RIT6Q | 96 |
| STM32U3C5CIU6 (STMicroelectronics) | CIU6 | 97 |
| STM32U3B5RIT6Q (STMicroelectronics) | B5RIT6Q | 98 |
| STM32U3B5CIT6Q (STMicroelectronics) | B5CIT6Q | 90 |
Variants within the STM32U3 sub-family primarily differ based on package type (LQFP vs QFN) and the specific inclusion of cryptographic acceleration hardware. For instance, the STM32U3C5 series includes comprehensive crypto features, whereas the STM32U3B5 variants offer a slightly different peripheral mix. Part numbers ending in 'Q' indicate the presence of the integrated SMPS, which is essential for maximizing power efficiency in DC-DC conversion scenarios.
