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STM32C091KCU3

STM32C091KCU3

STMicroelectronics
ARM Microcontrollers - MCU Mainstream Arm Cortex-M0+ MCU 256 Kbytes Flash 36 Kbytes RAM 48 MHz CPU 4x USART
Active200 in stock
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Overview

The STM32C091KCU3 is an STMicroelectronics mainstream Arm Cortex-M0+ microcontroller aimed at low-cost embedded control. It combines 256 KB of Flash, 36 KB of RAM, and a 48 MHz CPU with multiple USART interfaces for straightforward serial connectivity. This makes it a good fit for compact firmware-driven designs that need simple peripherals and modest memory resources.

Why Choose This Part

This part is attractive when you need an STM32 with enough Flash and RAM for real application firmware but do not need a higher-end core. The Cortex-M0+ architecture keeps the design simple, and the multiple USARTs help when the product depends on robust serial links. It is also a sensible choice for cost-sensitive designs that still benefit from the STM32 ecosystem.

Applications

Compact control nodes
Use it in small embedded controllers that read sensors, drive status outputs, and handle basic state machines.
Serial communication bridges
Its multiple USARTs make it suitable for translating or routing UART-based links in equipment and accessories.
IoT edge endpoints
Good for simple connected devices that need local control logic and serial connectivity without a large MCU footprint.
Prototype and evaluation boards
A practical choice for breadboard-style or custom dev boards when you want a low-cost STM32 platform for firmware development.
Industrial accessory modules
Fits helper modules, adapters, and interface boards that need deterministic embedded control and modest code space.

Getting Started

Start with ST's STM32CubeIDE and STM32CubeMX for pin planning and peripheral setup. For hardware bring-up and flashing, use an ST-LINK compatible debugger/programmer and a board based on the STM32C091 family, if available. Because exact package, pin count, and pinout matter, confirm the board reference design and the datasheet before routing a custom PCB.

Dev Boards

Development boards and breakout modules featuring the STM32C091KCU3 or compatible chips — ready to use for prototyping.

NUCLEO-C031C6 STMicroelectronics
Development Boards & Kits - ARM STM32 Nucleo-64 development board, STM32C031C6 supports Arduino and ST morpho
Mouser 807 in stock

Also Consider

STM32G031K8T6 STMicroelectronics - A compact STM32G0 alternative with a similar low-power, general-purpose MCU role.
STM32F030K6T6 STMicroelectronics - A widely used low-cost STM32 choice for simple control and serial-interface designs.
ATSAMD21G18A-AU MCHPMicrochip Technology - A common Cortex-M0+ alternative with broad availability and a strong hobbyist and maker ecosystem.