STM32F031K4U6
STM32F031K4U6 - 48MHz Cortex-M0 16KB MCU | STMicroelectronics
The STMicroelectronics STM32F031K4U6 is a 32-bit ARM Cortex-M0 microcontroller operating up to 48 MHz, with 16 KB of Flash memory and 27 I/O pins, housed in a 32-pin UFQFPN 5 x 5 mm package. The device provides 2.5 V and 3.3 V supply options and is positioned as an entry-level embedded-control MCU for compact industrial, consumer, communications, and automation products.
A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals on one device. The STM32F031K4U6 belongs to the hierarchy MCU -> embedded microcontroller -> ARM Cortex-M0 microcontroller -> STM32F0 series. Its Cortex-M0 architecture provides a 32-bit RISC processing environment while supporting peripherals commonly required for embedded products, including LIN, timers, PWM, SPI, UART/USART, I2C, IrDA, DMA, I2S, POR, and watchdog functions.
The principal feature set includes a 48 MHz maximum operating frequency, 16 KB Flash program memory, a 32-pin compact package, and up to 27 I/O pins. The Flash-oriented organization of 16K x 8 supports embedded firmware storage, while the 5 x 5 mm UFQFPN package is suitable for space-constrained assemblies. Available sourcing information identifies this exact ordering code as a 2.5 V or 3.3 V device.
The STM32F031K4U6 combines a general-purpose Cortex-M0 core with serial communication and timing resources suited to real-time control. Its reported peripherals include I2C, IrDA, LINbus, SPI, UART/USART, DMA, I2S, POR, PWM, and WDT. These interfaces allow the MCU to connect sensors, actuators, human-interface devices, communications transceivers, and audio converters without requiring several separate interface devices.
Typical uses include compact sensor nodes, industrial control modules, LIN-connected peripherals, communication equipment, motor and actuator controllers, and small consumer products. The 48 MHz processing rate provides additional timing margin for interrupt-driven control and protocol handling, while the 27 available I/O pins support multiple digital connections on a compact board.
Designers should verify the exact exposed-pad connection, decoupling requirements, clock configuration, and peripheral pin assignments against the manufacturer documentation before layout release. The target package is a 32-pin UFQFPN, and the thermal behavior of its exposed pad depends on the PCB copper area, solder mask, and thermal via arrangement. The verified excerpts do not provide the complete pin names, so no pin-level assignments are inferred here.
This product page consolidates verified distributor pricing, package and memory details, sourced drop-in candidates, and practical selection guidance. It distinguishes documented STM32F031K4U6 attributes from compatibility claims that require schematic, firmware, ADC, clock, and low-power validation before production substitution.
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