An ultra-low-power microcontroller features an Arm Cortex-M33 core with TrustZone and single-precision FPU, operating up to 96 MHz with 144 DMIPS performance and 117 CoreMark/mW efficiency. Integrated memory comprises 1 MB dual-bank Flash and 256 KB SRAM. Market-leading energy efficiency is achieved with 10 µA/MHz active mode consumption and 1.6 µA in stop mode, supporting a supply voltage range of 1.71 to 3.6 V and an operating temperature from -40 to +105 °C. Comprehensive analog integration includes two 12-bit ADCs up to 2.5 Msps, two DAC channels, two operational amplifiers, and two comparators. Digital connectivity features multiple timers, an audio digital filter, up to 21 capacitive touch channels, 3x I2C, 2x I3C, 3x SPI, 1x OCTOSPI, 2x USART, 2x UART, 1x LPUART, Full-Speed USB (Host/Device), 1x SDMMC, and 1x FDCAN. Advanced security is provided through hardware accelerators including AES, PKA, HASH (SHA-256), and TRNG, with a Coupling & Chaining Bridge on crypto-enabled variants, complemented by memory protection features like RDP, write protection, and secure proprietary code. Available in UFQFPN, LQFP, UFBGA, and WLCSP packages, the device is ECOPACK2 (lead-free, RoHS compliant).
STMicroelectronics STM32U3 technical specifications.
| CPU core | Arm Cortex‑M33 with TrustZone and single‑precision FPU |
| CPU frequency, max | 96MHz |
| DMIPS | 144DMIPS |
| CoreMark efficiency | 117CoreMark/mW |
| Flash memory | 1024 (dual‑bank)KB |
| SRAM | 256KB |
| Supply voltage (VDD) | 1.71 to 3.6V |
| Operating temperature range | -40 to +105 (up to +110 °C Tj)°C |
| Active mode consumption | 10µA/MHz |
| Stop mode current | 1.6µA |
| ADC | 2x 12‑bit up to 2.5 Msps |
| DAC | 2 channels |
| Operational amplifiers | 2 |
| Comparators | 2 |
| Timers | 3x 32‑bit GP, 1x 16‑bit PWM (motor), 3x 16bit GP, 2x 16‑bit basic, up to 4x 16‑bit low‑power |
| Audio digital filter (ADF) | 1 filter with sound‑activity detection |
| Capacitive touch channels | Up to 21 |
| I2C interfaces | 3 |
| I3C interfaces | 2 |
| SPI / OCTOSPI | 3x SPI and 1x OCTOSPI |
| USART/UART/LPUART | 2x USART, 2x UART, 1x LPUART |
| USB | Full‑Speed (Host or Device) |
| SDMMC | 1 |
| FDCAN | 1 |
| Security accelerators | AES, PKA, HASH (SHA‑256), TRNG; Coupling & Chaining Bridge (CCB) on crypto line |
| Memory protection | RDP, write protection, secure proprietary code (PCROP), secure/hide protection areas |
| Rohs/ecopack | ECOPACK2 (lead‑free, RoHS compliant) |
Download the complete datasheet for STMicroelectronics STM32U3 to view detailed technical specifications.
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