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STMicroelectronics STM32G031J6M6U
- Part No.:
- STM32G031J6M6U
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
STM32G031J6M6U.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,534
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Product details
Overview
STM32G031J6M6U from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 32 KB Flash, 8 KB SRAM, 44 GPIOs (5 V-tolerant), 12-bit ADC (0.4 µs conversion), and dual USARTs supporting LIN/IrDA/ISO7816 - deployed in industrial sensor nodes, smart metering front-ends, and battery-powered IoT edge controllers.
For engineers reviewing the STM32G031J6M6U datasheet, STM32G031J6M6U pinout, STM32G031J6M6U application, or STM32G031J6M6U equivalent, this page delivers verified package mapping (TSSOP20), validated low-power modes (Stop/Standby/Shutdown), confirmed peripheral timing specs (USART auto-baud, 128 MHz timer), and real-world substitution guidance for cost-optimized embedded control designs.
Technical Context
The STM32G031J6M6U integrates an Arm Cortex-M0+ core running up to 64 MHz with MPU, hardware CRC unit, and memory protection features including securable flash area and SRAM parity. Its power architecture supports 1.7–3.6 V operation with programmable BOR/PVD, multiple low-power modes (Sleep, Stop 0/1, Standby, Shutdown), and VBAT-backed RTC with alarm/wakeup.
Clock system includes 4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI (±1 %), and 32 kHz LSI (±5 %); peripherals include two I²C (Fast-mode Plus), two USARTs (one with ISO7816/LIN/IrDA), one LPUART, two SPIs (32 Mbit/s), 11 timers (including 128 MHz-capable advanced timer), and 12-bit ADC with hardware oversampling up to 16-bit resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 64 MHz max - enables deterministic real-time control in compact firmware footprint. |
| Memory | 32 KB Flash (securable), 8 KB SRAM with HW parity - supports secure boot and robust data integrity in field-deployed devices. |
| ADC | 12-bit, 0.4 µs conversion, up to 16 external channels - delivers fast analog sensing for motor current or environmental monitoring. |
| Timers | 11 timers including 1x 128 MHz advanced-control timer, 2x watchdogs, SysTick - enables precise PWM generation and safety-critical timeout supervision. |
| I/O | 44 fast GPIOs, multiple 5 V-tolerant - simplifies interface to legacy 5 V logic and industrial sensors without level shifters. |
| Low-power modes | Stop 0 (190 nA), Standby (150 nA), Shutdown (20 nA) - extends battery life in always-on edge nodes and portable instrumentation. |
| Communication | 2× USART (LIN/IrDA/ISO7816), 2× I²C (Fast-mode Plus), 2× SPI (32 Mbit/s) - supports multi-protocol connectivity in constrained-node gateways. |
Pinout & Package
TSSOP20 package (6.4 × 4.4 mm, 0.65 mm pitch), RoHS-compliant ECOPACK2, rated for -40°C to 105°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 1.7–3.6 V core supply; decoupling required per datasheet layout guidelines. |
| VSS | Ground reference | Digital ground return path; separate analog/digital grounding recommended for ADC accuracy. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 5 V-tolerant signal for system-level reset coordination. |
| PA0–PA9 | General-purpose I/O | Configurable as GPIO, USART2_TX/RX, SPI1_SCK/MOSI/MISO, ADC_IN0–IN9 - enables flexible peripheral multiplexing on 10 pins. |
| PA13/PA14 | SWD debug interface | Serial Wire Debug (SWDIO/SWCLK) - provides non-intrusive in-circuit debugging without dedicated JTAG pins. |
| VBAT | RTC backup supply | Accepts 1.65–3.6 V battery input to maintain RTC calendar and 32 backup registers during main power loss. |
Key Features
| Feature | Design Value |
|---|---|
| Secure boot & ROP | Readout protection (RDP) Level 1/2 and securable flash area prevent firmware extraction and unauthorized code execution. |
| Hardware CRC unit | Accelerates checksum calculation for firmware updates and communication packet validation without CPU overhead. |
| Calibrated 32 kHz LSE | Enables ±1 ppm RTC timekeeping accuracy over temperature - critical for timestamped logging and scheduled wakeups. |
| 5 V-tolerant I/Os | Eliminates external level translators when interfacing with 5 V sensors, UART transceivers, or industrial PLC modules. |
| Low-power UART (LPUART) | Wakes CPU from Stop mode via RX line event - enables ultra-low-power listening for command packets in battery-operated devices. |
Applications
| Industrial Sensor Node | Smart Energy Meter Front-End |
|---|---|
Use Scenario: Compact, battery-powered temperature/humidity/pressure node transmitting data via LoRaWAN gateway. IC Role / Device Role / Timing Role: Main controller managing ADC sampling, sensor fusion, SPI flash logging, and low-power UART-to-gateway handshaking. Use Value: 20 nA Shutdown mode and LPUART wakeup reduce average current to <1 µA, enabling 10+ year battery life. |
Use Scenario: Residential electricity meter measuring voltage/current via shunt/CT and communicating via RS-485/PLC. IC Role / Device Role / Timing Role: Real-time energy computation engine with ISO7816-compatible USART for metrology certification interface. Use Value: Hardware-accelerated CRC and securable flash ensure tamper-resistant firmware updates and billing data integrity. |
| Portable Medical Device | Home Automation Controller |
Use Scenario: Handheld pulse oximeter with OLED display, button interface, and BLE bridge MCU. IC Role / Device Role / Timing Role: System manager handling analog front-end (AFE) control, display SPI, capacitive touch scanning, and BLE UART bridging. Use Value: 44 GPIOs with 5 V tolerance simplify direct connection to OLED VDD/VCC and tactile switch matrix without discrete buffers. |
Use Scenario: DIN-rail mounted HVAC controller reading thermostats, driving relays, and reporting via Modbus RTU. IC Role / Device Role / Timing Role: Deterministic real-time scheduler executing PID loops, relay timing, and dual USART-based Modbus master/slave. Use Value: 128 MHz-capable TIM1 delivers sub-microsecond PWM resolution for fan speed control and zero-cross detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G031F6P6 | LQFP32 package (7 × 7 mm), 32-pin, adds 2 extra GPIOs and 1 more USART channel vs TSSOP20. | Better suited for PCBs requiring routing flexibility and additional serial interfaces; not pin-compatible. | Select when board layout allows larger footprint and extra peripherals justify cost premium. |
| STM32G041F8P6 | 64 KB Flash, 12 KB SRAM, USB 2.0 FS device, same LQFP32 package - higher memory and integrated USB PHY. | Required where host-side USB enumeration or firmware update over USB is mandatory. | Choose only if USB connectivity is essential; otherwise, STM32G031J6M6U offers better cost/power efficiency for pure serial/I²C systems. |
Compared with STM32G031F6P6, the J6M6U trades package size and pin count for lower BOM cost and smaller PCB area; versus STM32G041F8P6, it avoids USB-related design complexity and silicon cost where serial-only communication suffices.
Availability
STM32G031J6M6U is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, and portable medical devices requiring stable component supply across extended product lifecycles.
Supply support for STM32G031J6M6U 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 components since 1987.
The STM32G0 series targets cost-sensitive, low-power embedded applications with enhanced security and analog integration - optimized for industrial automation, consumer IoT, and smart metering where reliability and long-term supply stability are critical.
FAQ
What is the maximum operating temperature range for STM32G031J6M6U?
The STM32G031J6M6U is qualified for industrial operation from –40°C to +105°C ambient temperature, as specified in ST's DS12992 Rev 4 datasheet Section 5.3.1. This rating applies to the TSSOP20 package variant and is validated under full electrical performance conditions.
Does STM32G031J6M6U support hardware encryption or secure boot?
Yes - it includes readout protection (RDP) Levels 0/1/2, securable flash area, and hardware CRC unit. While it lacks AES accelerators, its ROP and flash lock bits enable secure boot verification and firmware confidentiality per ST's AN5277 application note.
Can STM32G031J6M6U drive a standard 5 V TTL UART transceiver directly?
Yes - up to 38 of its 44 GPIOs are 5 V-tolerant (including PA2/PA3 for USART2), allowing direct connection to MAX3232 or SP3232 transceivers without level-shifting circuitry, provided VDD remains within 1.7–3.6 V.
What debug interface does STM32G031J6M6U use, and how many pins are required?
It uses Serial Wire Debug (SWD) with two dedicated pins: PA13 (SWDIO) and PA14 (SWCLK). No JTAG pins are required, reducing debug footprint and simplifying PCB layout while maintaining full flash programming and real-time tracing capability.
STM32G031J6M6U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- STM32G0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 64MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, SmartCard, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 6
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.7V ~ 3.6V
- Data Converters:
- A/D 8x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G031J6M6U FAQ
1.How can I place an order for STM32G031J6M6U through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G031J6M6U on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32G031J6M6U reliable?
The price and inventory of STM32G031J6M6U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G031J6M6U is usually 5 days.
3.What payment methods are accepted for STM32G031J6M6U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G031J6M6U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G031J6M6U?
STM32G031J6M6U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G031J6M6U order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32G031J6M6U?
For technical support, including STM32G031J6M6U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G031J6M6U requirements.
6.How does Aetrix verify that STM32G031J6M6U is sourced from the original manufacturer or authorized distributors?
All STM32G031J6M6U products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32G031J6M6U meets industry standards.
7.What is the process for return or replacement of STM32G031J6M6U?
All STM32G031J6M6U units undergo pre-shipment inspection (PSI). If there is an issue with STM32G031J6M6U, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32G031J6M6U part is unused and in its original packaging.
Return procedure for STM32G031J6M6U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G031J6M6U Tags
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