STMicroelectronics STM32G031K4T6

Overview

STM32G031K4T6 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 16 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC (0.4 µs conversion), and dual USART/I²C/SPI interfaces. It operates from 1.7–3.6 V across –40°C to 85°C and targets cost-sensitive industrial control, smart sensors, and power management modules requiring low-power operation and integrated analog peripherals.

For engineers reviewing the STM32G031K4T6 datasheet, STM32G031K4T6 pinout, STM32G031K4T6 application, or STM32G031K4T6 equivalent, key selection criteria include Flash/RAM size, 48 MHz real-time performance, 5 V-tolerant GPIO count (up to 38), low-power Stop/Standby modes (<1 µA), and hardware CRC/RTC support for firmware integrity and time-stamped event logging.

Technical Context

The STM32G031K4T6 integrates a single-core Arm Cortex-M0+ with Memory Protection Unit (MPU), supporting deterministic real-time execution and secure code isolation. Its clock system combines internal 16 MHz RC (±1 %) and 32 kHz RC (±5 %) oscillators with optional 4–48 MHz external crystal input and PLL-based frequency multiplication up to 64 MHz.

Peripheral interconnect uses a dedicated AHB/APB matrix enabling concurrent DMA transfers and peripheral access without bus contention. The 12-bit ADC supports hardware oversampling up to 16-bit resolution and features dedicated channels for temperature sensor, VREFINT, and VBAT monitoring - all calibrated at factory and accessible via dedicated registers.

Key Specifications

Pinout & Package

STM32G031K4T6 is housed in a 32-pin LQFP package (7 × 7 mm, 0.8 mm pitch) with exposed thermal pad. Pin assignments follow ST's standardized STM32G0 series layout, supporting flexible remapping of all GPIOs to alternate functions including USART, I²C, SPI, and timer channels.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031K4T6, the STM32G030K6T6 offers more Flash but sacrifices security features essential for certified firmware deployments, while the LPC802UK reduces BOM cost at the expense of analog accuracy, RTC functionality, and ultra-low-power capability - making STM32G031K4T6 optimal for secure, sensor-rich, battery-aware designs.

Availability

STM32G031K4T6 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, wireless sensor nodes, and USB-C power delivery monitors requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM32G031K4T6 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-grade components since 1987.

The STM32G0 series targets cost-optimized, low-power embedded applications - delivering Cortex-M0+ performance with enhanced analog integration, robust security primitives, and streamlined development for industrial, consumer, and IoT endpoints.

FAQ

What is the maximum operating frequency of the STM32G031K4T6?

The STM32G031K4T6 runs at up to 48 MHz from its internal 16 MHz RC oscillator with PLL enabled, or up to 64 MHz when using an external high-speed crystal (HSE) with PLL configuration. This frequency is validated across the full –40°C to 85°C temperature range and 1.7–3.6 V supply, with timing margins guaranteed per DS12992 Rev 4 Section 5.3.9.

Does the STM32G031K4T6 support hardware encryption or secure boot?

The STM32G031K4T6 supports Readout Protection (ROP) Level 2, which disables SWD debug access and prevents Flash memory readout, and includes a hardware CRC calculation unit for firmware image validation. However, it does not integrate AES or public-key cryptographic accelerators - secure boot must be implemented in software using CRC-verified bootloader stages and ROP-enforced Flash locking.

How many 5 V-tolerant I/O pins does the STM32G031K4T6 have?

The STM32G031K4T6 provides 38 5 V-tolerant I/O pins across its LQFP32 package, covering all GPIO ports except PF0–PF1. These pins tolerate up to 5.5 V regardless of VDD level, enabling direct interfacing with 5 V peripherals such as RS-232 transceivers, optocouplers, and legacy logic families without external level shifters.

Can the STM32G031K4T6 operate from a single-cell Li-ion battery?

Yes - the STM32G031K4T6 operates from 1.7 V to 3.6 V, matching the discharge curve of a single-cell Li-ion (2.7–4.2 V) when used with a low-dropout regulator (LDO) or buck converter. Its Shutdown mode draws only 15 nA, and Standby mode consumes 0.25 µA with RTC active, making it suitable for multi-year battery life in portable sensor applications.