STMicroelectronics STM32G031K8U6

Overview

STM32G031K8U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 package, operating up to 64 MHz with 64 KB Flash, 8 KB SRAM, and integrated 12-bit ADC (0.4 µs conversion), dual USARTs (one with LIN/IrDA/ISO7816), and RTC with alarm/wakeup-used in smart sensor nodes and industrial control edge devices.

For engineers reviewing the STM32G031K8U6 datasheet, STM32G031K8U6 pinout, STM32G031K8U6 application, or STM32G031K8U6 equivalent, key selection criteria include its 64 MHz CPU frequency, 5 V-tolerant I/Os, low-power Stop/Standby modes (down to 190 nA), and dual I²C interfaces supporting Fast-mode Plus (1 Mbit/s) with SMBus/PMBus wakeup capability.

Technical Context

The device integrates an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via readout protection (RDP) levels and securable flash area. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and ±1% internal 16 MHz HSI with PLL for precise timing across temperature ranges (−40°C to 125°C).

Peripheral interconnect uses a dedicated AHB/APB matrix enabling concurrent DMA transfers (5-channel controller), flexible timer routing (11 timers including 128 MHz-capable TIM1), and hardware oversampling (up to 16-bit) on the 12-bit ADC-enabling high-accuracy analog sensing without external components.

Key Specifications

Pinout & Package

STM32G031K8U6 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package, 5 × 5 mm, 0.5 mm pitch, ECOPACK2-compliant, with exposed thermal pad for enhanced thermal dissipation in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G030K8T6, the G031K8U6 provides critical security and analog precision features (VREFBUF, securable Flash) absent in the G030; versus STM32G041K8U6, it trades USB and extra Flash for lower unit cost and identical footprint-ideal for cost-constrained, non-USB edge nodes.

Availability

STM32G031K8U6 is available at Aetrix Electronics and suitable for smart metering nodes, industrial PLC I/O modules, wireless sensor hubs, and medical diagnostic handhelds requiring stable component supply across long-lifecycle deployments.

Supply support for STM32G031K8U6 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, MEMS, and automotive-grade components since 1987.

The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications-delivering Cortex-M0+ performance with advanced analog integration, robust security primitives, and industrial temperature range support in compact packages.

FAQ

What is the maximum operating temperature rating for STM32G031K8U6?

The STM32G031K8U6 is qualified for operation from −40°C to +125°C ambient temperature, validated per ST's industrial grade specification. This rating applies to all core functions, ADC, timers, and communication peripherals-no derating required up to 125°C, making it suitable for under-hood automotive sensors and enclosed industrial enclosures.

Does STM32G031K8U6 support hardware encryption or secure boot?

STM32G031K8U6 includes readout protection (RDP) levels and a securable Flash area to prevent unauthorized firmware extraction, but lacks dedicated cryptographic accelerators (AES, PKA) or true secure boot ROM. Secure boot must be implemented in user code using RDP and Flash lock bits-suitable for basic IP protection, not FIPS-level compliance.

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

Yes-the internal 16 MHz HSI oscillator operates at ±1% accuracy without calibration and supports full 64 MHz CPU operation via PLL. Calibration is optional and improves accuracy to ±0.5%, but is unnecessary for most timing-critical applications like UART baud generation or PWM control where jitter tolerance exceeds ±2%.

How many I/O pins support external interrupt capability?

All 26 general-purpose I/O pins (PA0–PA15, PB0–PB11) are mappable to external interrupt vectors via the EXTI controller. Each pin can trigger rising/falling/both-edge interrupts independently, and up to 16 EXTI lines are available-enabling simultaneous wake-up from Stop mode on multiple sensor alert signals without polling.