STMicroelectronics STM32G031C8T7

Overview

STM32G031C8T7 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 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 wakeup from Stop/Standby modes. It targets cost-sensitive industrial control, smart sensors, and power management modules requiring low-power operation across -40°C to 125°C.

For engineers reviewing the STM32G031C8T7 datasheet, STM32G031C8T7 pinout, STM32G031C8T7 application, or STM32G031C8T7 equivalent, key selection considerations include its 28-pin UFQFPN footprint, 1.7–3.6 V supply range, hardware parity on SRAM, programmable BOR/PVD, and support for SWD debug - all critical for robust embedded firmware deployment and BOM optimization.

Technical Context

The STM32G031C8T7 implements an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via readout protection levels and securable flash area. Its clock system integrates HSE (4–48 MHz), LSE (32.768 kHz), HSI16 (±1%), and LSI (±5%) oscillators, plus a PLL for precise frequency synthesis up to 64 MHz.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix with DMA controller (5 channels) and DMAMUX for flexible peripheral-to-memory transfers. All 25 GPIOs are 5 V-tolerant, mappable to external interrupts, and support multiple alternate functions including I²C, SPI, USART, and timer channels - enabling compact, multi-interface designs without external level shifters.

Key Specifications

Pinout & Package

STM32G031C8T7 is housed in a 28-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 mm × 4 mm, 0.5 mm pitch, with exposed thermal pad. This compact, RoHS-compliant ECOPACK2 package supports high-density PCB layouts and efficient thermal dissipation in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031C8T7, the STM32G030F6P6 sacrifices memory, security, and analog capability for lower cost and smaller size, while the STM32G041F8P6 adds cryptographic acceleration but drops the UFQFPN28 package and VBAT-RTC integration - making STM32G031C8T7 optimal for compact, secure, battery-aware industrial nodes.

Availability

STM32G031C8T7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart power outlets, POS terminal peripherals, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for STM32G031C8T7 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 automotive semiconductors since 1987.

The STM32G0 series targets cost-sensitive, low-power embedded applications - delivering Cortex-M0+ performance with enhanced analog integration, security features, and industrial-grade reliability in compact packages.

FAQ

Does STM32G031C8T7 support hardware encryption?

No, STM32G031C8T7 does not include dedicated cryptographic accelerators such as AES or TRNG. It relies on software-based encryption libraries. For hardware crypto, consider STM32G041 or STM32G071 variants which integrate AES-128 and TRNG engines alongside identical peripheral sets and pin compatibility in larger packages.

What is the maximum allowed I/O sink current per pin?

The absolute maximum DC sink current per I/O pin is 25 mA, with a total device limit of 120 mA across all pins. The datasheet specifies that sustained 25 mA operation requires careful thermal design due to junction temperature rise - typical recommended continuous sink is ≤20 mA per pin with proper PCB copper pour and airflow.

Can the internal 32 kHz RC oscillator replace the external LSE crystal for RTC operation?

Yes, the internal 32 kHz RC oscillator can drive the RTC, but with ±5% accuracy versus ±20 ppm for a typical 32.768 kHz crystal. For applications requiring precise timekeeping (e.g., metering, timestamping), the external LSE is mandatory; the internal RC is suitable only for coarse wakeup timing or non-critical calendar functions.

Is SWD debug supported in all low-power modes?

SWD debug remains accessible in Sleep mode but is disabled in Stop, Standby, and Shutdown modes. To maintain debug visibility during low-power operation, use Sleep mode with peripherals clock-gated, or implement a dedicated debug wake-up pin (e.g., EXTI on PA0) to re-enable SWD after exiting deeper low-power states.