STMicroelectronics reveals STM32U3 microcontrollers extending ultra-low power innovation for remote, smart and sustainable applications Latest MCUs leverage cutting-edge near-threshold chip design to set record performance-per-watt efficiency benchmark Secret-key protection and in-factory provisioning boost cyber securityTypical applications include utility meters, healthcare devices, and industrial sensors Geneva, Switzerland, March 4, 2025 – STMicroelectronics (NYSE: STM), a global semiconductor leader serving customers across the spectrum of electronics applications, has introduced new STM32U3 microcontrollers (MCUs) with cutting-edge power-saving innovations that ease deployment of smart connected tech, especially in remote locations.
STM32U3 MCUs set new standards in dynamic performance by taking advantage of near-threshold technology that operates IC transistors at extremely low voltage, saving energy proportionately according to a square lawST’s innovative near-threshold implementation uses AI-driven adaptive voltage scaling at wafer level to compensate for process variations in the foundryIn addition to dynamic power savings (down to 10µA/MHz), the STM32U3 series achieve extremely low stop current, at 1.6µASTM32U3 embeds up to 1MB of Flash memory dual-bank and 256kB of SRAM In terms of security, STM32U3 MCUs embed all successful security features of the STM32U5, with additional keystore capabilities.
Newly, secret keys are loaded in-factory by ST on the STM32U3 MCUs and are protected by a coupling and chaining bridge (CCB), representing the first use of this technology in the STM32 MCU familyTwo product lines are available, presenting a choice of MCUs either with or without a hardware cryptographic acceleratorCombined with their low power, the devices integrate efficient and high-performing peripherals including the latest I3C digital connectivityMCUs are available in commercial (-40°C to 85°C) and extended industrial (-40°C to 105°C) temperature ranges The STM32U3 series is in production now and available from $1.93 for orders of 10,000 pieces.
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Author / Journalist: STMicroelectronics International NV
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