STMicroelectronics STM32G031K8T6

Overview

STM32G031K8T6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in LQFP32 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/ISO7816), and RTC with alarm/wakeup. It targets cost-sensitive industrial control nodes, smart sensors, and battery-powered IoT edge devices requiring low-power operation down to Shutdown mode (200 nA).

For engineers reviewing the STM32G031K8T6 datasheet, STM32G031K8T6 pinout, STM32G031K8T6 application, or STM32G031K8T6 equivalent, key selection criteria include its 64 MHz Cortex-M0+ core with MPU, 5 V-tolerant GPIOs, dual I²C (one Fast-mode Plus), SWD debug support, and -40°C to 85°C temperature grade - all confirmed in DS12992 Rev 4.

Technical Context

The STM32G031K8T6 integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU) and executes from embedded Flash with securable area and hardware parity on SRAM. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and internal 16 MHz RC (±1 %) with PLL for precise timing control across operating modes.

Peripheral interconnect uses a dedicated AHB/APB matrix supporting concurrent DMA transfers (5-channel controller), 11 timers including one 128 MHz-capable advanced timer (TIM1), two low-power timers (LPTIM1/LPTIM2), and dual I²C interfaces - one with SMBus/PMBus and Stop-mode wakeup, the other with Fast-mode Plus (1 Mbit/s) and extra current sink.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch), ECOPACK2-compliant, with 26 user I/Os, 3 power pins (VDD, VSS, VDDA), 2 reset/debug (NRST, SWDIO/SWCLK), and dedicated VBAT supply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031K8T6, the G041 adds USB at no Flash/SRAM penalty but increases cost and complexity, while the LPC812 sacrifices RTC, security, ADC performance, and low-power capability - making STM32G031K8T6 optimal for balanced cost, feature depth, and industrial-grade reliability.

Availability

STM32G031K8T6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, POS peripherals, and portable medical diagnostics requiring stable component supply across extended product lifecycles.

Supply support for STM32G031K8T6 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32G0 series targets entry-level embedded applications demanding high integration, ultra-low power, and robust security - optimized for cost-sensitive designs where Cortex-M0+ performance meets real-time control and connectivity needs without premium licensing or toolchain overhead.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32G031K8T6 operates at up to 64 MHz using its internal 16 MHz RC oscillator with PLL or external crystal sources. Its supply voltage range is strictly 1.7 V to 3.6 V - operation outside this range risks functional failure or permanent damage. The device includes programmable Brownout Reset (BOR) and Voltage Detector (PVD) to enforce safe voltage margins during brownout conditions.

Does it support hardware-based security features like secure boot or Flash protection?

Yes. The STM32G031K8T6 implements hardware-enforced Readout Protection (RDP) Level 2, which permanently disables debug access and Flash readout once activated. It also supports secure boot via option bytes and a dedicated securable Flash area, enabling cryptographic signature verification before application code execution - critical for preventing unauthorized firmware updates.

How many I/O pins are 5 V-tolerant, and what is their purpose?

Multiple GPIOs on Port A, B, and C are explicitly rated 5 V-tolerant (FT_e class), including PA0–PA15, PB0–PB1, and PC0–PC15 - totaling up to 26 pins. These tolerate 5 V inputs while powered from 1.7–3.6 V, eliminating external level shifters when interfacing with legacy 5 V logic, sensors, or industrial I/O modules - reducing BOM cost and PCB area.

What low-power modes are available, and what is the lowest achievable current draw?

The STM32G031K8T6 supports Sleep, Stop, Standby, and Shutdown modes. In Shutdown mode with RTC and backup registers disabled, typical current consumption is 200 nA at 25°C (VDD = 3.3 V). With RTC active and VBAT supplied, current rises to ~1.2 µA - verified in DS12992 Rev 4 Table 31 and Table 32 - enabling decade-long battery operation in metering and sensor applications.