STMicroelectronics STM32C031K4T7

Overview

STM32C031K4T7 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in LQFP32 package, operating up to 48 MHz with 32 KB flash and 12 KB SRAM. It integrates dual USARTs (one with LIN/ISO7816), 12-bit ADC (19-channel), eight timers including advanced motor-control TIM1, and supports 2.0–3.6 V supply across –40°C to 125°C. Used in industrial sensor nodes and smart metering front-ends requiring compact, low-power MCU control.

For engineers reviewing the STM32C031K4T7 datasheet, STM32C031K4T7 pinout, STM32C031K4T7 application, or STM32C031K4T7 equivalent, key selection factors include its 125°C extended temperature rating, 5 V-tolerant I/Os, integrated CRC unit, hardware parity on SRAM, and dual USARTs with LIN bus support - critical for automotive body electronics and industrial HMI designs.

Technical Context

The STM32C031K4T7 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU) for task isolation in real-time firmware. Its clock system combines a 4–48 MHz HSE crystal oscillator, 32 kHz LSE with calibration, and two internal RC oscillators (48 MHz ±1 %, 32 kHz ±5 %), enabling precise timing for RTC and low-power wake-up.

Peripherals are interconnected via a multi-layer AHB/APB bus matrix supporting concurrent DMA transfers. The 12-bit ADC achieves 0.4 µs conversion time over 0–3.6 V range and includes dedicated temperature sensor and VREFINT channels, while the 3-channel DMA controller supports flexible peripheral-to-memory mapping without CPU intervention.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch), ECOPACK2-compliant surface-mount package with exposed thermal pad (pin 32). Compatible with standard reflow profiles and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit Cortex-M0+ microcontroller applications.

Compared with STM32C011F4U6, the STM32C031K4T7 adds calendar RTC, LIN-capable USART, and extended temperature grade - making it superior for time-sensitive automotive and industrial deployments. Versus STM32G031F8P6, it trades USB and higher flash for lower cost and identical package compatibility, ideal for cost-sensitive volume production.

Availability

STM32C031K4T7 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, automotive body electronics, and IoT edge sensor node applications requiring stable component supply, long-term lifecycle assurance, and extended temperature performance.

Supply support for STM32C031K4T7 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32C0 series targets cost-sensitive, high-volume embedded applications demanding robustness, low power, and simplified certification - particularly in industrial automation, appliance control, and automotive sub-systems where extended temperature and functional safety readiness are critical.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32C031K4T7 operates at up to 48 MHz using its internal 48 MHz RC oscillator (±1 %) or external crystal. Its supply voltage range is strictly 2.0 V to 3.6 V for VDD/VDDA, with absolute maximum ratings of –0.3 V to 4.0 V on all I/O pins. Operation outside this range risks permanent damage or undefined behavior.

Does it support hardware debug and in-circuit programming?

Yes - the device features a two-pin Serial Wire Debug (SWD) interface (SWDIO and SWCLK) compliant with ARM CoreSight. It supports full read/write memory access, breakpoint setting, and real-time variable inspection via ST-LINK/V2 or compatible debug probes, with no external components required beyond standard 10-pin SWD header routing.

How many I/O pins are 5 V tolerant and what is their maximum sink/source capability?

All 32 GPIOs (PA0–PA15, PB0–PB15, PF0–PF1) are 5 V tolerant with VDD = 2.0–3.6 V. Each pin supports up to 20 mA sink/source per I/O, with total current limit of 120 mA for all I/Os combined. This allows direct driving of LEDs, small relays, or level-shifting to legacy 5 V logic without external buffers.

What low-power modes are available and what is typical current consumption in Stop mode?

Four low-power modes are supported: Sleep, Stop, Standby, and Shutdown. In Stop mode with RTC running and ultra-low-power regulator enabled, typical current consumption is 0.8 µA at 25°C (measured per DS13867 Rev 4, Table 32). Wake-up time from Stop is ≤5 µs via EXTI or RTC alarm, enabling rapid response to external events.