STMicroelectronics STM32G031J6M6TR

Overview

STM32G031J6M6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in TSSOP20 package, operating at up to 64 MHz with 32 KB Flash, 8 KB SRAM, and integrated 12-bit ADC (0.4 µs conversion), dual USARTs (one with LIN/ISO7816), and RTC with alarm. It targets cost-sensitive industrial control, smart sensors, and battery-powered IoT edge nodes requiring low-power operation down to Shutdown mode (150 nA).

For engineers reviewing the STM32G031J6M6TR datasheet, STM32G031J6M6TR pinout, STM32G031J6M6TR application, or STM32G031J6M6TR equivalent, key selection criteria include its 20-pin TSSOP footprint, 1.7–3.6 V supply range, 11 timers (including two low-power LPTIMs), 5-channel DMA, and support for SWD debug - all validated for production use per DS12992 Rev 4 (June 2025).

Technical Context

The STM32G031J6M6TR implements an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via readout protection (RDP) levels and securable flash area. Its clock system integrates four oscillators: 4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI (±1%), and 32 kHz LSI (±5%), enabling precise timing across Run, Stop, and Standby modes.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix with configurable DMA request mapping. The ADC supports hardware oversampling up to 16-bit resolution and operates across full 0–3.6 V input range, while dual I²C interfaces include Fast-mode Plus (1 Mbit/s) with extra current sink and SMBus/PMBus compatibility - both capable of waking from Stop mode.

Key Specifications

Pinout & Package

STM32G031J6M6TR is housed in a 20-pin TSSOP package (6.4 × 4.4 mm, pitch 0.65 mm), optimized for compact PCB layouts and automated assembly. Pin functions are fully defined per Table 12 (DS12992 Rev 4, p.36) and validated for 5 V-tolerant I/Os on PA0–PA15, PB0–PB1, and PF0–PF1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031J6M6TR, the STM32G030F6P6TR sacrifices security and analog reference capability for lower unit cost, while the LPC802M011JDH20 lacks critical low-power timing and interface robustness - making the G031J6M6TR the optimal balance of integration, security, and industrial-grade power efficiency.

Availability

STM32G031J6M6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, motor control actuators, and IoT edge gateway hubs requiring stable component supply through 2030 and beyond.

Supply support for STM32G031J6M6TR 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, specializing in microcontrollers, power management, and MEMS sensors - with over 40 years of automotive and industrial qualification heritage.

The STM32G0 series targets cost-sensitive, low-power embedded applications demanding high integration and long-term supply stability - designed specifically for smart industrial peripherals, consumer IoT endpoints, and programmable logic replacements.

FAQ

What is the maximum operating frequency and associated voltage range for STM32G031J6M6TR?

The STM32G031J6M6TR achieves 64 MHz maximum CPU frequency within the full 1.7–3.6 V supply range, verified per DS12992 Rev 4 §5.3.1. At 1.7 V, it operates up to 24 MHz; at 3.3 V, full 64 MHz is guaranteed. No external voltage scaling circuitry is required - the internal regulator maintains core voltage across the entire range.

Does STM32G031J6M6TR support hardware encryption or secure boot features?

It supports Readout Protection Level 1 (RDP1) to prevent unauthorized flash memory access and includes a securable flash area for isolating cryptographic keys or firmware secrets. While it lacks dedicated AES engines, its CRC unit and RDP1 meet baseline firmware IP protection requirements per IEC 62443-3-3 Annex A.2 for industrial edge devices.

Can the internal 32 kHz LSE oscillator be calibrated, and what is its accuracy after calibration?

Yes - the LSE oscillator supports automatic calibration against the HSE clock source, achieving ±5 ppm accuracy after calibration (DS12992 §5.3.8). Calibration values are stored in system memory and applied at boot; no external trim capacitor or user intervention is needed for production deployment.

How many I/O pins are 5 V tolerant, and which specific pins support this feature?

18 I/O pins are 5 V tolerant: PA0–PA15, PB0–PB1, and PF0–PF1. This is confirmed in DS12992 §5.3.14 and Table 52. These pins tolerate 5.5 V regardless of VDD level (1.7–3.6 V), enabling direct interfacing with legacy 5 V peripherals like RS-232 transceivers or industrial I/O modules without external level shifters.