STMicroelectronics STM32G031C4T6

Overview

STM32G031C4T6 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 sensor nodes and smart metering front-ends requiring integrated analog sensing and low-power serial communication.

For engineers reviewing the STM32G031C4T6 datasheet, STM32G031C4T6 pinout, STM32G031C4T6 application, or STM32G031C4T6 equivalent, key selection criteria include its 28-pin TSSOP package, 5 V-tolerant GPIOs, hardware CRC unit, programmable BOR/PVD, and support for ISO7816/LIN/IRDA on USART1 - critical for secure peripheral interfacing and battery-backed RTC operation.

Technical Context

The STM32G031C4T6 integrates a single-core Arm Cortex-M0+ 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 - enabling precise timing for synchronous comms and motor control loops.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix with DMA request multiplexer (DMAMUX), allowing flexible routing of 5 DMA channels to 39 request sources including ADC, timers, and USARTs. The 11-timer suite includes one 128 MHz-capable advanced timer (TIM1), four general-purpose 16-bit timers, and two low-power timers (LPTIM1/LPTIM2) optimized for sub-microamp wake-up from Stop mode.

Key Specifications

Pinout & Package

STM32G031C4T6 is housed in a 20-pin TSSOP package (6.4 × 4.4 mm, pitch 0.65 mm), RoHS-compliant and ECOPACK2 certified. Pin functions are validated per ST's DS12992 Rev 4, Section 4 (Pin assignment and description), with all pins supporting remappable alternate functions via SYSCFG registers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031C4T6, the STM32G030F6P6 omits VBAT support and secure boot, limiting use in regulated environments; the LPC802M011JDH20 lacks both 5 V-tolerant I/Os and LIN/ISO7816, making it incompatible with industrial metering or payment interfaces requiring those protocols.

Availability

STM32G031C4T6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, POS peripheral controllers, and home appliance motor control systems requiring stable component supply, long-lifecycle assurance, and ECOPACK2 compliance.

Supply support for STM32G031C4T6 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 analog components for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, low-power embedded applications with enhanced security and analog integration - specifically engineered for smart metering, sensor hubs, and white goods control where Flash size, package footprint, and certification readiness matter.

FAQ

What is the maximum operating frequency of the STM32G031C4T6?

The STM32G031C4T6 runs at up to 48 MHz using its internal 16 MHz HSI oscillator with PLL multiplication or external crystal sources. This frequency is confirmed in Section 3.9 (Clocks and startup) and Table 43 (PLL characteristics) of DS12992 Rev 4, with timing validated across –40°C to 85°C ambient and 1.7–3.6 V supply range.

Does the STM32G031C4T6 support USB connectivity?

No, the STM32G031C4T6 does not include a USB peripheral. Its communication interfaces are limited to two I²C, two USART, one LPUART, and two SPI ports - as explicitly listed in Table 2 (Device features and peripheral counts) and Section 3.19–3.21 of the datasheet. USB functionality requires higher-series variants like STM32G071 or G0B1.

Can the STM32G031C4T6 operate from a 3.3 V supply with 5 V-tolerant I/Os?

Yes - the device operates from 1.7–3.6 V and features multiple 5 V-tolerant GPIOs (e.g., PA0–PA7, PB0–PB1) as specified in Section 5.3.14 (I/O port characteristics) and Table 52 (Input characteristics of FT_e I/Os). These pins tolerate 5 V even when VDD = 3.3 V, enabling direct interfacing with legacy 5 V logic without level shifters.

What debug interface does the STM32G031C4T6 use?

The STM32G031C4T6 uses Serial Wire Debug (SWD) with two dedicated pins: SWDIO (PA13) and SWCLK (PA14). This is documented in Section 3.22.1 and Figure 13 (Pin layout - TSSOP20), supporting full programming, real-time debugging, and trace via ST-LINK/V2 or CMSIS-DAP compliant adapters.