STMicroelectronics STM32G031C6T6

Overview

STM32G031C6T6 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 32 KB Flash, 8 KB SRAM, operating at up to 64 MHz, supporting 1.7–3.6 V supply and -40°C to 85°C ambient. It integrates dual USARTs (one with LIN/ISO7816), two I²C interfaces (Fast-mode Plus), two SPIs, 12-bit ADC (16-channel), eleven timers including LPTIMs and RTC, and SWD debug - deployed in smart metering front-ends and industrial sensor nodes.

For engineers reviewing the STM32G031C6T6 datasheet, STM32G031C6T6 pinout, STM32G031C6T6 application, or STM32G031C6T6 equivalent, key selection criteria include its 32-pin LQFP package, 5 V-tolerant GPIOs, hardware parity on SRAM, programmable BOR/PVD, and dual low-power UART/I²C wakeup capability from Stop mode.

Technical Context

The STM32G031C6T6 implements a single-core Arm Cortex-M0+ with Memory Protection Unit (MPU), supporting TrustZone-like secure boot via readout protection (RDP) levels and securable flash area. Its clock system combines internal 16 MHz RC (±1 %) with PLL, 4–48 MHz HSE, and 32 kHz LSE with calibration for RTC accuracy.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix with DMA request multiplexer (DMAMUX) enabling flexible channel mapping across 5 DMA streams. Analog subsystem includes VREFINT, temperature sensor, VBAT monitoring, and 12-bit ADC with hardware oversampling up to 16-bit effective resolution.

Key Specifications

Pinout & Package

LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK2 certified. Pin count: 32 leads with exposed thermal pad (not electrically connected). Operating temperature: -40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031C6T6, STM32G030F6P6 trades security and analog features for lower cost and smaller footprint, while STM32G041F8P6 adds USB and crypto at the expense of higher BOM complexity and marginally increased power in active mode.

Availability

STM32G031C6T6 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and portable medical diagnostics requiring stable component supply across extended product lifecycles.

Supply support for STM32G031C6T6 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, MEMS, and automotive-grade silicon since 1987.

The STM32G0 series targets cost-sensitive, low-power embedded applications demanding high integration, security primitives, and industrial temperature reliability - optimized for smart sensing, control, and connectivity edge nodes.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32G031C6T6 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) with four threshold levels to enforce safe voltage margins during brownout conditions.

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

Yes - the STM32G031C6T6 implements Readout Protection (RDP) Level 1 and Level 2, enabling irreversible lock of debug access and flash content. It also provides a securable area within Flash memory where sensitive code or keys can be isolated and protected from unauthorized read/write access, meeting basic requirements for firmware IP protection and secure boot chain implementation.

How many I/O pins are 5 V tolerant, and which ones?

26 of the 32 GPIOs on the LQFP32 package are 5 V tolerant, specifically PA0–PA15, PB0–PB11 (excluding PB2 used for BOOT1). This tolerance allows direct interfacing with 5 V peripherals such as legacy sensors, displays, or level-shifting-free RS-232 transceivers without external circuitry - verified per ST's electrical characteristics table (Section 5.3.14).

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

The device supports Sleep, Stop (0 and 1), Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped, SRAM retained), typical current is 0.34 µA at 25°C with RTC and IWDG enabled. In Stop 1 mode (low-power regulator off), consumption drops to 0.19 µA - both values measured with VDD = 3.3 V and specified in DS12992 Rev 4, Table 28–29.