STMicroelectronics STM32G031K4U6

Overview

STM32G031K4U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 package, operating up to 64 MHz with 16 KB Flash, 8 KB SRAM, and integrated 12-bit ADC (0.4 µs conversion), dual USARTs (one with LIN/ISO7816), and two I²C interfaces supporting Fast-mode Plus (1 Mbit/s). It targets low-cost industrial control and smart sensor nodes requiring robust peripheral integration and extended temperature operation (–40°C to 125°C).

For engineers reviewing the STM32G031K4U6 datasheet, STM32G031K4U6 pinout, STM32G031K4U6 application, or STM32G031K4U6 equivalent, key selection criteria include its 32-pin UFQFPN footprint, 16 KB Flash density, dual USART + LPUART combo for multi-protocol communication, hardware CRC unit, and support for Stop/Standby low-power modes with RTC wakeup.

Technical Context

The STM32G031K4U6 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU) and executes from embedded Flash with securable area and HW parity-checked SRAM. Its clock system integrates 4–48 MHz HSE, 32 kHz LSE with calibration, and internal 16 MHz RC (±1%) with PLL - enabling precise timing for real-time control loops and communication synchronization.

Peripheral interconnect uses a dedicated AHB/APB matrix supporting concurrent DMA transfers across 5-channel controller with flexible mapping. Analog subsystem includes 12-bit ADC with hardware oversampling (up to 16-bit effective resolution), internal VREFINT, temperature sensor, and VBAT monitoring - all calibrated and specified across full industrial temperature range.

Key Specifications

Pinout & Package

STM32G031K4U6 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package, 5 × 5 mm, 0.5 mm pitch, ECOPACK2-compliant. Pin layout supports full GPIO remapping, 5 V-tolerant I/Os on selected pins, and dedicated SWD debug interface (SWCLK/SWDIO/NRST).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031F6P6, the STM32G031K4U6 offers superior low-power comms via LPUART and smaller footprint; versus LPC804M101JDH20, it delivers higher clock speed, richer analog features, and production-grade temperature qualification - making it optimal for industrial edge nodes demanding reliability and feature density.

Availability

STM32G031K4U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, motor control modules, and IoT edge gateway subsystems requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.

Supply support for STM32G031K4U6 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 specializing in microcontrollers, power management, and sensing technologies - with over 40 years of automotive and industrial design-in experience.

The STM32G0 series targets cost-sensitive, power-constrained applications requiring Arm Cortex-M0+ performance, robust peripherals, and seamless toolchain integration - optimized for smart sensors, home appliances, and industrial automation.

FAQ

Does STM32G031K4U6 support USB device functionality?

No. The STM32G031K4U6 does not integrate a USB PHY or USB controller. It relies on external USB-to-UART bridges (e.g., CP2102) for host connectivity. USB support begins with higher-density G0 variants like STM32G071, which include full-speed USB 2.0 device controllers.

What is the maximum frequency of the advanced-control timer (TIM1)?

TIM1 operates at up to 128 MHz, derived from the APB2 clock domain. This frequency enables 7.8 ns PWM resolution at 1 GHz counter rate, supporting high-precision motor control and digital power conversion without external timing ICs.

Can the internal 16 MHz RC oscillator be used as the system clock without calibration?

Yes - the HSI16 oscillator runs uncalibrated at ±1% accuracy, sufficient for UART baud rate generation and general-purpose timing. For tighter tolerance (e.g., USB or audio), the HSI16 can be trimmed using the RCC_HSICALIBR register based on LSE or external reference.

Is the STM32G031K4U6 pin-compatible with other STM32G031 variants in UFQFPN32?

Yes - all STM32G031x6 devices in UFQFPN32 (e.g., STM32G031J6, STM32G031G6) share identical pinouts and electrical characteristics. Differences are limited to Flash size (16 KB vs. 32 KB) and peripheral enablement - allowing scalable firmware reuse across the family.