Extend battery life and protect data in cost-sensitive industrial, medical, and consumer devices with the ultra-low-power STM32U3.
The STM32U3 series offers greater power efficiency in run mode compared to previous product generations. It is the first STM32 based on near-threshold design which drastically reduces the dynamic consumption of the final application. This product represents the market-leader in term of efficiency with 117 Coremark/mW and a static mode < 2 µA.
The series is based on an Arm© Cortex©-M33 core, with extended memory: 256 Kbytes of RAM and 1 Mbyte of dual bank flash. The STM32U3 series supports -40 °C to +105 °C temperature range.
Product types
This product line offers best-in-class low-power consumption and high energy efficiency without compromising costs: it comes in nine packages from 32 to 100 pins, in UFQFPN, WLCSP, LQFP, and UFBGA. The STM32U385xx devices embed several protection mechanisms and cryptography features.
Discover our product offering
| Product types | CPU (MHz) | FLASH (KB) | RAM (KB) | ULP Comparators | ULP timers | I3C | Coupling and chaining bridge (CCB) | HUK + PKA | AES 128/256 + S-AES |
| STM32U375 | 96 | 512 to 1024 | 256 | 2 | 4 | 2 | |||
| STM32U385 | 96 | 1024 | 256 | 2 | 4 | 2 | • | • | • |
Applications
Key benefits
Industry-leading energy efficiency
- Greater power efficiency in run mode compared to previous generations
- Near-threshold design drastically reducing dynamic consumption
- Market-leading efficiency with 117 Coremark/mW, (5X more efficient compared to previous product generations)
- Static mode (STOP) < 2 µA
Robust security to safeguard sensitive applications
- PSA Certified L3 & SESIP3 targets
- Key hardware protection provided by the coupling and chaining bridge (CCB) HAL
- In-factory provisioned attestation ensuring product authenticity
- Side-channel resistant hardware protection
- Ready for Cyber Resilience Act (CRA)
Versatile peripheral offering without compromising cost efficiency
- Built on 40 nm platform
- Integrating essential peripherals: I3C (new and updated IP allowing efficient data transfer, real-time event handling, error detection) and FDCAN IP (low-latency communication, large data transfer)
- Enabling a simple PCB design
Discover our development tools and software for STM32U3 series
Featured Videos
One number sums up the efficiency of the STM32U3: at 117 Coremark/mW, it breaks the 100 symbolic threshold, literally making it a new benchmark in the industry.