STMicroelectronics STM32C031G6U7TR

Overview

STM32C031G6U7TR from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, featuring 32 KB flash, 12 KB SRAM with hardware parity, 48 MHz max CPU frequency, and integrated 12-bit ADC (0.4 µs conversion), two USARTs (one with LIN/ISO7816), I²C Fast-mode Plus (1 Mbit/s), and SPI (24 Mbit/s). It targets cost-sensitive industrial control, smart sensors, and power management modules requiring robust low-power operation down to Shutdown mode.

For engineers reviewing the STM32C031G6U7TR datasheet, STM32C031G6U7TR pinout, STM32C031G6U7TR application, or STM32C031G6U7TR equivalent, key selection criteria include its 5 V-tolerant GPIOs, calibrated 32 kHz LSE oscillator, programmable brownout reset (BOR), CRC calculation unit, and SWD debug interface - all validated for -40°C to 125°C extended temperature operation.

Technical Context

The device integrates an Arm Cortex-M0+ core with MPU, supporting memory protection and deterministic real-time execution. Its clock system combines four oscillators: 4–48 MHz HSE, 32 kHz LSE with calibration, 48 MHz HSI48 (±1%), and 32 kHz LSI (±5%), enabling precise timing across operating modes.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix with DMA controller (3 channels, flexible mapping) and NVIC with 32 interrupt lines. Analog subsystem includes temperature sensor, VREFINT, and ADC with up to 19 external channels and 0–3.6 V input range - all accessible without external components.

Key Specifications

Pinout & Package

STM32C031G6U7TR is housed in a 28-pin UFQFPN (4 × 4 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per STM32C031GxU pinout (Figure 4, DS13867 Rev 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32C011F4U6TR, STM32C031G6U7TR delivers 2× flash, calendar RTC, and 28-pin routing flexibility; versus STM32G031F8P6, it avoids USB overhead while maintaining identical analog/peripheral feature set and lower unit cost.

Availability

STM32C031G6U7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, power supply monitors, and home appliance UI controllers requiring stable component supply across long-lifecycle production programs.

Supply support for STM32C031G6U7TR 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, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32C0 series targets cost-optimized, high-reliability embedded applications - specifically engineered for entry-level industrial control, smart actuators, and energy-efficient IoT endpoints where flash size, temperature range, and 5 V tolerance are decisive.

FAQ

What is the maximum operating frequency and associated voltage range for STM32C031G6U7TR?

The STM32C031G6U7TR operates at up to 48 MHz across its full 2.0–3.6 V supply range. At 2.0 V, maximum frequency is 24 MHz; at 2.4 V and above, full 48 MHz operation is guaranteed per DS13867 Rev 4 Section 5.3.1. This scaling enables dynamic voltage/frequency optimization in battery-powered designs.

Does STM32C031G6U7TR support hardware encryption or secure boot features?

No. The STM32C031G6U7TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It provides readout protection (RDP) Level 1 and Level 2, but lacks tamper detection, secure key storage, or bootloader authentication - making it unsuitable for applications requiring FIPS 140-2 or PSA Level 2 compliance.

Can the internal 48 MHz RC oscillator be used as the system clock source without external components?

Yes. The HSI48 oscillator is factory-trimmed to ±1% accuracy and can serve as the main system clock without crystals or capacitors. It supports automatic calibration against the LSE (32 kHz) for improved long-term stability, and is the default clock source after reset per Section 3.9 of DS13867 Rev 4.

What is the minimum supply current in Shutdown mode, and what peripherals remain active?

In Shutdown mode, supply current is 100 nA typical at 25°C (Section 5.3.34, DS13867 Rev 4). Only the reset circuit and wakeup logic (via WKUP pins or RTC alarm) remain functional; all clocks, SRAM, and peripherals are powered off. No ADC, timers, or communication interfaces operate in this state.