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STMicroelectronics STM32G431MBT3
- Part No.:
- STM32G431MBT3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
STM32G431MBT3.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
STM32G431MBT3 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, 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 conversion), and 3 operational amplifiers. It targets motor control, digital power conversion, and industrial sensing systems requiring real-time math acceleration via CORDIC and FMAC.
For engineers reviewing the STM32G431MBT3 datasheet, STM32G431MBT3 pinout, STM32G431MBT3 application, or STM32G431MBT3 equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support for flexible data-rate automotive/industrial networks, ultra-fast rail-to-rail comparators for precise threshold detection, and hardware parity on critical SRAM blocks for functional safety compliance.
Technical Context
The STM32G431MBT3 implements a tightly coupled Arm Cortex-M4 core with FPU and Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its memory subsystem includes 128 KB Flash with ECC and PCROP, 22 KB main SRAM with hardware parity on first 16 KB, and 10 KB CCM SRAM with parity-optimized for deterministic real-time code/data separation.
Analog integration centers on two independent 16-bit ADCs (up to 23 channels, hardware oversampling), four ultra-fast comparators, three user-accessible op-amps (configurable as PGAs), and dual 12-bit DACs-one pair buffered (1 MSPS) for external actuation, one unbuffered (15 MSPS) for internal signal generation-enabling closed-loop control without external signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 170 MHz max frequency (213 DMIPS), ART Accelerator for zero-wait-state Flash execution |
| Memory | 128 KB Flash with ECC and PCROP; 22 KB SRAM (16 KB with parity); 10 KB CCM SRAM (parity-enabled) |
| Analog Peripherals | 2 × 16-bit ADCs (0.25 µs, 23 ch, oversampling); 4 × rail-to-rail comparators; 3 × op-amps (PGA-capable); 2 × buffered 12-bit DACs (1 MSPS) |
| Math Acceleration | CORDIC engine for trigonometric/logarithmic functions; FMAC for FIR/IIR filter computation-offloads CPU in motor/power control |
| Timers & Control | 2 × advanced motor-control timers (TIM1/TIM8) with 8 PWM channels, dead-time insertion, emergency stop; 14 total timers including LPTIM1 and RTC |
| Communication | FDCAN (flexible data-rate); 4 × USART/UART (LIN/IrDA/ISO7816); 3 × I²C (Fast Mode Plus, 1 Mbit/s); USB 2.0 FS with LPM/BCD; UCPD for USB Type-C PD |
| Package & Supply | UFQFPN48 (7 × 7 mm, 0.5 mm pitch); VDD/VDDA = 1.71–3.6 V; operates across industrial temperature range (–40°C to +85°C) |
Pinout & Package
STM32G431MBT3 is housed in a 48-pin Ultra Fine Pitch Quad Flat No-lead (UFQFPN48) package measuring 7 mm × 7 mm with 0.5 mm lead pitch, optimized for compact industrial and motor drive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply | 1.71–3.6 V input; separate analog domain enables clean ADC/DAC reference and reduced noise coupling |
| VSS, VSSA | Digital & analog ground | Independent ground planes minimize switching noise impact on precision analog measurements |
| PA0–PA15, PB0–PB15, PC13–PC15, PD2 | General-purpose I/O | Up to 38 fast I/Os; most support 5 V tolerance and external interrupt mapping for sensor/event handling |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1 | ADC inputs | Support simultaneous sampling across two 16-bit ADCs for multi-axis current/voltage monitoring in motor drives |
| PA4, PA5, PA6, PA7 | DAC outputs | PA4/PA5 = buffered 12-bit DAC1/2 (1 MSPS); PA6/PA7 = unbuffered DAC1/2 (15 MSPS) for high-speed internal feedback |
| PA11, PA12, PB9, PB10, PB11, PB12, PB13, PB14, PB15 | USART/SPI/I²C alternate functions | Flexible peripheral remapping via GPIO AFRL/AFRH registers enables board-level routing optimization |
| PA11, PA12 | USB D+/D− | Integrated USB 2.0 full-speed transceiver with LPM and battery charging detection-no external PHY required |
| PD0, PD1 | FDCAN RX/TX | Dedicated differential CAN FD interface supporting up to 5 Mbit/s data phase for real-time industrial networking |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric/logarithmic computation reduces CPU load by >70% in field-oriented motor control loops |
| FMAC unit | Configurable 32-bit filter engine executes 128-tap FIR in <1 µs-enables real-time adaptive filtering in digital power supplies |
| Op-amp PGA mode | All three op-amp terminals accessible; programmable gain (1–20×) without external resistors-simplifies current-sense front-end design |
| VREFBUF output options | Three factory-trimmed reference voltages (2.048 V, 2.5 V, 2.9 V) for ADC/DAC calibration and sensor excitation-eliminates external voltage references |
| Advanced timer dead-time | Programmable 1–1023 ns dead-time insertion with automatic fault recovery-prevents shoot-through in 3-phase inverter gate drivers |
Applications
| Motor Control System | Digital Power Supply |
|---|---|
|
Use Scenario: 3-phase BLDC/PMSM motor drive with field-oriented control (FOC) and current loop bandwidth >10 kHz. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, ADC sampling, PWM generation, and fault protection in real time. Use Value: CORDIC and FMAC offload compute-intensive sine/cosine and current-loop filtering; dual ADCs enable simultaneous phase current sampling; advanced timers deliver precise 3-phase PWM with dead-time control. |
Use Scenario: Isolated AC/DC or DC/DC converter with digital voltage/current regulation and adaptive compensation. IC Role / Device Role / Timing Role: Digital power controller managing feedback loop, soft-start, overvoltage/overcurrent protection, and communication with host system. Use Value: 16-bit ADCs provide high-resolution output voltage/current measurement; buffered DACs generate precise reference signals; FDCAN enables robust communication with upstream supervisory controllers. |
| Industrial Sensor Hub | USB-C Power Delivery Endpoint |
|
Use Scenario: Multi-sensor node aggregating temperature, pressure, and analog process signals for edge preprocessing before Ethernet/LoRaWAN transmission. IC Role / Device Role / Timing Role: Signal acquisition and preprocessing unit with local calibration, filtering, and protocol translation. Use Value: Integrated op-amps condition low-level sensor outputs; VREFBUF provides stable excitation; hardware CRC and RNG support secure firmware updates and data integrity. |
Use Scenario: USB-C powered peripheral (e.g., docking station, monitor) requiring dynamic power negotiation up to 100 W. IC Role / Device Role / Timing Role: UCPD controller managing PD contract negotiation, VBUS monitoring, and role swapping (DFP/UFP). Use Value: Dedicated UCPD peripheral handles BMC encoding/decoding and PD message parsing in hardware-reduces firmware complexity and ensures timing-critical PD compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G431KBT3 | LQFP32 package (32-pin), reduced I/O count (25 vs. 38), same core/peripherals but no FDCAN or UCPD | Suitable for space-constrained cost-sensitive designs where CAN/USB-C PD not required | Select when board layout favors QFP and peripheral count can be reduced without sacrificing core control functionality |
| STM32G474RET6 | LQFP64 package, 512 KB Flash, 128 KB SRAM, additional crypto accelerators (AES/RSA), no UCPD | Targeted at higher-security applications (e.g., secure firmware update, encrypted comms) with larger code footprint | Choose when extended memory, cryptographic features, or more I/Os justify larger package and higher BOM cost |
Compared with STM32G431KBT3, the MBT3 adds FDCAN and UCPD in a pin-compatible 48-pin footprint; versus STM32G474RET6, it trades memory/crypto for lower cost and USB-C PD capability-making it optimal for cost-sensitive, USB-C–enabled motor and power systems.
Availability
STM32G431MBT3 is available at Aetrix Electronics and suitable for motor control systems, digital power converters, industrial sensor nodes, and USB-C PD endpoints requiring stable component supply and long-term industrial lifecycle support.
Supply support for STM32G431MBT3 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, specializing in microcontrollers, power management, sensors, and automotive ICs.
The STM32G4 series is designed for real-time industrial and digital power applications, integrating high-performance analog peripherals, math accelerators, and communication interfaces-including FDCAN and UCPD-to replace discrete signal chains in cost-sensitive, space-constrained systems.
FAQ
What is the maximum operating frequency and associated performance metric of the STM32G431MBT3?
The STM32G431MBT3 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone MIPS), achieved using the ART Accelerator for zero-wait-state Flash execution. Its Cortex-M4 core includes a single-precision FPU and DSP instructions, enabling efficient floating-point math and signal processing in real-time control applications.
Does the STM32G431MBT3 support hardware-based security features for firmware protection?
Yes-it includes proprietary Code Read-Out Protection (PCROP) for Flash memory, securable memory areas, and a 96-bit unique device ID. While it lacks dedicated cryptographic accelerators (e.g., AES engines), PCROP prevents unauthorized readout of sensitive firmware, and the hardware CRC unit supports integrity checking of stored code and configuration data.
How does the STM32G431MBT3 handle analog signal acquisition for motor current sensing?
It uses two independent 16-bit ADCs with hardware oversampling (up to 12-bit effective resolution at 2 Msps), simultaneous sampling capability, and built-in offset/gain calibration. Paired with three accessible op-amps configurable as programmable-gain amplifiers, it enables direct connection to shunt resistors or current transformers without external signal conditioning circuitry.
Is the STM32G431MBT3 pin-compatible with other members of the STM32G431 family?
Within the same package variant (UFQFPN48), STM32G431MBT3 is pin-compatible with other G431xB variants (e.g., STM32G431CBT3, STM32G431RBT3). However, it is not pin-compatible with LQFP32, LQFP48, or UFBGA64 variants due to differing pin counts and I/O mappings-even when sharing identical peripheral sets.
STM32G431MBT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 80-LQFP
- Series:
- STM32G4
- Packaging:
- Bulk
- 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:
- 66
- 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:
STM32G431MBT3 FAQ
1.How can I place an order for STM32G431MBT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431MBT3 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 STM32G431MBT3 reliable?
The price and inventory of STM32G431MBT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431MBT3 is usually 5 days.
3.What payment methods are accepted for STM32G431MBT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431MBT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431MBT3?
STM32G431MBT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431MBT3 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 STM32G431MBT3?
For technical support, including STM32G431MBT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431MBT3 requirements.
6.How does Aetrix verify that STM32G431MBT3 is sourced from the original manufacturer or authorized distributors?
All STM32G431MBT3 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 STM32G431MBT3 meets industry standards.
7.What is the process for return or replacement of STM32G431MBT3?
All STM32G431MBT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431MBT3, 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 STM32G431MBT3 part is unused and in its original packaging.
Return procedure for STM32G431MBT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G431MBT3 Tags
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