STMicroelectronics STM32C031K6U7

Overview

STM32C031K6U7 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 32 KB flash, 12 KB SRAM with hardware parity, 48 MHz max CPU frequency, and integrated peripherals including two USARTs, one I²C, one SPI, 12-bit ADC (19 channels), eight timers, and RTC. It targets cost-sensitive industrial control and smart sensor nodes requiring robust low-power operation down to -40°C to 125°C.

For engineers reviewing the STM32C031K6U7 datasheet, STM32C031K6U7 pinout, STM32C031K6U7 application, or STM32C031K6U7 equivalent, key selection criteria include its 5 V-tolerant I/Os, ±1 % internal 48 MHz RC oscillator, programmable brownout reset, SWD debug interface, and support for Stop/Standby/Shutdown low-power modes with sub-μA retention current.

Technical Context

The STM32C031K6U7 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU), enabling secure task isolation in real-time embedded applications. Its clock system integrates dual oscillators - a calibrated 32 kHz LSE for RTC and a factory-trimmed 48 MHz HSI for main system timing - both supporting automatic calibration and failover.

Peripheral interconnect uses a multi-layer AHB/APB bus matrix with DMA controller supporting flexible channel mapping to UART, SPI, I²C, and ADC. The 12-bit ADC achieves 0.4 µs conversion time across 0–3.6 V input range and includes dedicated temperature sensor and VREFINT channels with factory calibration data stored in system memory.

Key Specifications

Pinout & Package

STM32C031K6U7 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package measuring 5 × 5 mm with 0.5 mm pitch and exposed thermal pad. This RoHS-compliant, ECOPACK2-qualified package supports automated optical inspection and offers superior thermal dissipation for continuous 48 MHz operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32G031F8P6, the STM32C031K6U7 offers lower system BOM cost and tighter thermal specs but omits USB; versus RP2040, it delivers certified functional safety readiness, extended temperature operation, and production-grade power management - critical for certified industrial designs.

Availability

STM32C031K6U7 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, wireless sensor nodes, and automotive body electronics requiring stable component supply across long-lifecycle programs.

Supply support for STM32C031K6U7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive semiconductors since 1987.

The STM32C0 series targets entry-level embedded applications demanding high integration, ultra-low power, and industrial-grade reliability - optimized for cost-constrained designs where robustness and qualification matter more than raw performance.

FAQ

What is the maximum operating frequency of the STM32C031K6U7?

The STM32C031K6U7 features an Arm Cortex-M0+ core rated for up to 48 MHz operation. This frequency is achievable using the internal 48 MHz HSI oscillator (±1 % accuracy) or an external crystal up to 48 MHz. All peripherals-including timers, ADC, and communication interfaces-are fully functional at this speed without clock stretching or gating penalties.

Does the STM32C031K6U7 support hardware encryption or secure boot?

No, the STM32C031K6U7 does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It provides readout protection (RDP) Level 1 and Level 2, memory protection unit (MPU) for software-defined privilege separation, and write protection for flash sectors - sufficient for basic IP protection but not for certified secure boot implementations.

Can the STM32C031K6U7 drive a standard 5 V LCD segment display directly?

Yes - all GPIOs are 5 V-tolerant and can sink/source up to 20 mA per pin (with total I/O current limited to 120 mA). When configured in push-pull mode with appropriate current-limiting resistors, it can directly drive common-anode or common-cathode LCD segments without external level shifters or driver ICs.

Is there a pin-compatible upgrade path from the STM32C031K6U7?

Yes - the STM32C031K6U7 (UFQFPN32) shares identical pinout and footprint with STM32C031K4U7 (16 KB flash) and STM32C011K6U7 (same spec, different qualification grade). For higher performance, STM32G031K6U7 offers pin-for-pin compatibility with added USB and enhanced ADC, though requiring minor firmware adaptation for new peripherals.