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STMicroelectronics STM32G431RBT3TR
- Part No.:
- STM32G431RBT3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32G431RBT3TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,040
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Product details
Overview
STM32G431RBT3TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU and ART Accelerator, operating up to 170 MHz (213 DMIPS), featuring 128 KB Flash with ECC, 32 KB SRAM (22 KB + 10 KB CCM), and integrated analog peripherals including dual 12-bit DACs (1 MSPS buffered), dual 16-bit ADCs (0.25 µs), four rail-to-rail comparators, three op-amps, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.
For engineers reviewing the STM32G431RBT3TR datasheet, STM32G431RBT3TR pinout, STM32G431RBT3TR application, or STM32G431RBT3TR equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support, 5 V-tolerant I/Os, low-power timer with encoder interface, and hardware-accelerated trigonometric filtering for real-time control loops.
Technical Context
This MCU implements an adaptive real-time memory accelerator (ART) enabling zero-wait-state execution from Flash at 170 MHz, paired with a multi-AHB interconnect matrix for concurrent peripheral access. Its analog subsystem integrates two independent 16-bit ADCs with hardware oversampling and 23-channel multiplexing, plus four ultra-fast comparators with programmable hysteresis and blanking.
The timing architecture includes two 16-bit advanced motor control timers (TIM1/TIM8) supporting 8-channel PWM, dead-time insertion, emergency stop, and quadrature encoder input - directly addressing field-oriented control (FOC) and three-phase inverter gate drive requirements without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, enabling single-cycle MAC and IEEE 754-compliant floating-point math for real-time control algorithms. |
| Max Clock Frequency | 170 MHz with ART Accelerator - delivers 213 DMIPS and deterministic interrupt latency critical for servo loop timing. |
| Flash Memory | 128 KB with ECC and PCROP protection - supports secure firmware updates and prevents unauthorized code extraction in industrial deployments. |
| SRAM | 32 KB total: 22 KB general-purpose (16 KB parity-checked) + 10 KB CCM SRAM on instruction/data bus - isolates time-critical ISR code from cache coherency overhead. |
| Analog Peripherals | Dual 16-bit ADCs (0.25 µs conversion), 4× comparators, 3× op-amps (PGA mode), 4× 12-bit DACs - enables closed-loop analog signal conditioning and feedback within single chip. |
| Communication | FDCAN (flexible data-rate), 4× USART, 3× SPI, 3× I²C, USB FS, UCPD - supports CAN FD-based battery management, isolated serial comms, and USB-C PD negotiation. |
| Math Acceleration | CORDIC (trig/log/sqrt) and FMAC (filtering) units offload CPU - reduces computation time for motor phase estimation and digital filter execution by >90% vs software-only. |
Pinout & Package
STM32G431RBT3TR uses a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per ST's DS12589 Rev 6, Section 4.3 (UFQFPN48 pinout description) and Table 12 (pin definition).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply | 1.71–3.6 V operation; separate analog domain ensures ADC/DAC reference stability during digital switching noise. |
| VSS, VSSA | Ground return paths | Dedicated analog ground (VSSA) minimizes coupling into sensitive analog circuits like op-amp inputs and ADC references. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2 | General-purpose I/O | Up to 38 GPIOs with 5 V tolerance - simplifies level-shifting in mixed-voltage industrial I/O interfaces. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB12–PB15 | ADC input channels | Direct connection to dual 16-bit ADCs with 23-channel mux - supports simultaneous sampling of voltage/current/temperature in motor drives. |
| PA4, PA5, PA6, PA7 | DAC output channels | Two buffered 12-bit DACs (1 MSPS) for analog setpoint generation; two unbuffered (15 MSPS) for high-speed waveform synthesis. |
| PA8, PA9, PA10, PA11, PA12, PB6, PB7, PB8, PB9 | USART/SPI/I²C alternate functions | Flexible remapping via AFIO allows routing of multiple serial interfaces to non-conflicting pins for board layout optimization. |
| PA11, PA12 | USB D+/D− | Integrated USB 2.0 full-speed PHY eliminates external transceiver - reduces BOM cost and PCB area in diagnostic or configuration tools. |
| PD0, PD1 | FDCAN RX/TX | Dedicated differential CAN FD interface with bit rates up to 5 Mbit/s - enables high-bandwidth communication in battery pack monitoring and EV charging systems. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric/logarithmic computation in <100 ns - replaces ~2000-cycle software libraries for sine/cosine in FOC motor control. |
| FMAC unit | Configurable 32-tap FIR/IIR filter engine - executes real-time current harmonics suppression or sensor fusion without CPU load. |
| Advanced timers (TIM1/TIM8) | 8-channel complementary PWM with programmable dead time (1–1024 ns resolution) and emergency stop input - meets IEC 61800-5-2 functional safety requirements for inverters. |
| VREFBUF | Internal voltage reference buffer with selectable outputs (2.048 V / 2.5 V / 2.9 V) - eliminates external precision reference ICs for ADC/DAC calibration and sensor biasing. |
| LPUART + RTC alarm | Sub-microamp wake-up from Stop mode via LPUART frame or RTC alarm - enables battery-powered remote sensors with years of operation on coin cell. |
Applications
| Industrial Motor Control | Digital Power Supply |
|---|---|
Use Scenario: Field-oriented control (FOC) of 3-phase BLDC/PMSM motors in HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of Clarke/Park transforms, PI current regulators, and space-vector PWM generation using CORDIC and FMAC units. Use Value: Achieves <1 µs loop closure with deterministic jitter, eliminating need for external DSP or FPGA in mid-tier motor drives. | Use Scenario: Digital AC-DC and DC-DC converters with adaptive voltage regulation and fault protection. IC Role / Device Role / Timing Role: Simultaneous sampling of primary-side current/voltage and secondary-side output via dual ADCs; generating isolated gate drive signals via advanced timers. Use Value: Enables 95%+ efficiency and dynamic load transient response <50 µs using on-chip analog front-end and hardware PWM modulation. |
| Smart Battery Management | Industrial Sensor Hub |
Use Scenario: Multi-cell Li-ion battery pack monitoring with cell balancing, temperature sensing, and FDCAN telemetry. IC Role / Device Role / Timing Role: FDCAN controller handles high-speed cell voltage reporting; internal temperature sensor and VBAT monitor provide autonomous health diagnostics. Use Value: Supports ISO 11898-1 compliant CAN FD frames at 2 Mbit/s, enabling real-time SOC/SOH updates across 10+ modules without host intervention. | Use Scenario: Condition monitoring node aggregating vibration, pressure, and humidity data from analog/digital sensors. IC Role / Device Role / Timing Role: Op-amps condition piezoelectric sensor outputs; 16-bit ADC oversamples at 100 kSPS; LPUART transmits compressed FFT data over RS-485. Use Value: On-chip PGA and hardware filtering reduce external signal chain components by 40%, lowering system BOM and calibration complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G431KBT3 | Same core/peripherals but in 32-pin LQFP package (fewer GPIOs and no FDCAN) | Limited to simpler motor control or sensor nodes without CAN connectivity | Select when board space permits larger LQFP and CAN is not required. |
| STM32G474RET6 | Higher Flash (512 KB), more timers (3x advanced), USB HS, no UCPD | Suitable for complex HMI-enabled power systems requiring larger code footprint and faster USB data transfer | Choose for designs needing >256 KB Flash or USB high-speed host capability. |
Compared with STM32G431KBT3, the STM32G431RBT3TR adds FDCAN and 16 extra GPIOs in a smaller 7×7 mm package; versus STM32G474RET6, it trades Flash size and USB speed for lower cost and integrated USB-C PD control - making it optimal for cost-sensitive, CAN-connected embedded power electronics.
Availability
STM32G431RBT3TR is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and smart battery management requiring stable component supply across long-life production cycles.
Supply support for STM32G431RBT3TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32G4 series targets high-performance, cost-sensitive embedded control applications - combining Cortex-M4 processing, rich analog integration, and hardware math acceleration to replace discrete signal-chain components in power electronics and motor drives.
FAQ
What is the maximum operating temperature range for STM32G431RBT3TR?
The STM32G431RBT3TR is qualified for industrial temperature range: –40 °C to +85 °C ambient, with junction temperature limits defined in Section 6.10 of DS12589 Rev 6. Thermal derating begins above 70 °C ambient under full CPU/peripheral load, requiring appropriate PCB copper pour and airflow per ST's AN5247 layout guidelines.
Does STM32G431RBT3TR support hardware encryption or secure boot?
No - the STM32G431RBT3TR lacks cryptographic accelerators (AES/RSA), TRNG entropy source beyond basic RNG, or secure boot ROM. It provides PCROP for Flash readout protection and securable memory areas, but does not meet PSA Level 1 or SESIP certification requirements. For secure firmware updates, external secure elements (e.g., STSAFE-A110) are recommended.
Can the internal op-amps be used as instrumentation amplifiers?
Yes - all three op-amps support programmable gain amplifier (PGA) mode with gains of 2, 4, 8, 16, or 32 via internal resistor networks. Inputs and outputs are fully accessible on dedicated pins (e.g., OPAMP1_VINP/OPAMP1_VOUT), enabling direct use as single-ended or differential-input PGAs for sensor signal conditioning without external components.
Is the UFQFPN48 package RoHS and REACH compliant?
Yes - STM32G431RBT3TR carries full RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 compliance, with lead-free matte tin finish and halogen-free molding compound. Full material declarations and test reports are available in ST's ECOPACK2 database under order code STM32G431RBT3TR.
STM32G431RBT3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32G4
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit
- Speed:
- 170MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 23x12b SAR; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G431RBT3TR FAQ
1.How can I place an order for STM32G431RBT3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431RBT3TR 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 STM32G431RBT3TR reliable?
The price and inventory of STM32G431RBT3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431RBT3TR is usually 5 days.
3.What payment methods are accepted for STM32G431RBT3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431RBT3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431RBT3TR?
STM32G431RBT3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431RBT3TR 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 STM32G431RBT3TR?
For technical support, including STM32G431RBT3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431RBT3TR requirements.
6.How does Aetrix verify that STM32G431RBT3TR is sourced from the original manufacturer or authorized distributors?
All STM32G431RBT3TR 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 STM32G431RBT3TR meets industry standards.
7.What is the process for return or replacement of STM32G431RBT3TR?
All STM32G431RBT3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431RBT3TR, 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 STM32G431RBT3TR part is unused and in its original packaging.
Return procedure for STM32G431RBT3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G431RBT3TR Tags
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