MCUs Squeeze Into Smaller Smart Devices

STMicroelectronics’ STM32L412 and STM32L422 microcontrollers (MCUs) promise ultra-low power consumption and high performance for budget-conscious consumer, industrial, and medical applications. Combining 64 KB or 128 KB Flash density with features such as FlexPowerControl (FPC), and the 80-MHz Arm Cortex-M4 core, they set EEMB benchmarks for efficiency and performance. A 273 CoreMark provides for speedy execution in devices like smart sensors or consumer wearables, while 167 ULPMark-PP (Peripheral Profile) and 447 ULPMark-CP (Core Profile) demonstrate category-leading energy management.


Analog peripherals including two ADCs to perform simultaneous acquisition and a comparator integrate more of the signal chain on-chip, for sensing or heart-rate monitoring. Extra package options include 5 mm x 5 mm LQFP32 or 2.58 mm x 3.07 mm WLCSP36. A choice of temperature grades span from -40°C to +85°C or +125°C. Flash error correction (ECC) and parity-checking hardware for on-chip SRAM enhance system safety. A Quad-SPI interface allows high-performance off-chip memory extension and there are rich peripherals for control and connectivity.


Two Nucleo boards also join the ecosystem, including the NUCLEO-L412RB-P containing a 64-pin STM32L412 with step-down converter, and the NUCLEO-L412KB with a 32-pin STM32L412. The new devices come with ST’s 10-year product-availability assurance. The STM32L412 and STM32L422 are in production now, with up to 128Kbyte Flash and 32-pin to 64-pin packages, priced from $1.51 for the STM32L412K8U6 with 64KByte Flash in QFN-32, each/10,000 pieces per year. For greater illumination, peruse the product page.


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