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STMicroelectronics STM32G431CBU6U
- Part No.:
- STM32G431CBU6U
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32G431CBU6U.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,595
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Product details
Overview
STM32G431CBU6U from STMicroelectronics is a 32-bit Arm® Cortex®-M4 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), 4 comparators, 3 op-amps, and CORDIC/FMAC math accelerators - deployed in motor control, digital power supplies, and industrial sensor nodes.
For engineers reviewing the STM32G431CBU6U datasheet, STM32G431CBU6U pinout, STM32G431CBU6U application, or STM32G431CBU6U equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support, USB 2.0 FS + UCPD, low-power timer with sub-microsecond resolution, and hardware-accelerated trigonometric filtering for real-time control loops.
Technical Context
The STM32G431CBU6U implements an Arm Cortex-M4 core with FPU and Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its interconnect matrix routes 14 timers-including two 16-bit advanced motor-control timers with dead-time generation and emergency stop-to peripherals without CPU intervention.
Analog subsystem integration includes three rail-to-rail op-amps configurable as programmable-gain amplifiers (PGA), dual independent 12-bit DACs (2 buffered external, 2 unbuffered internal), and dual 16-bit ADCs supporting hardware oversampling and up to 23 channels - all sharing a common 0–3.6 V reference range and synchronized via trigger routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 170 MHz max frequency → enables deterministic real-time control with floating-point math in motor commutation or PID tuning. |
| Memory | 128 KB Flash (ECC-enabled), 22 KB SRAM + 10 KB CCM SRAM → supports secure firmware storage and low-latency instruction/data access for time-critical ISR handling. |
| Analog Peripherals | Dual 16-bit ADCs (0.25 µs), 4x comparators, 3x op-amps (PGA mode), 4x 12-bit DACs → enables closed-loop analog signal chain integration without external components in power converter feedback. |
| Math Acceleration | CORDIC + FMAC units → offloads trigonometric and FIR/IIR filter computations from CPU, reducing latency in field-oriented control (FOC) or sensor fusion. |
| Communication | FDCAN (flexible data-rate), USB 2.0 FS + UCPD, 4x USART, 3x SPI, 3x I²C → supports automotive-grade diagnostics, USB-C PD negotiation, and multi-protocol industrial connectivity. |
| Package & Pin Count | UFQFPN48 (7 × 7 mm, 0.5 mm pitch) with 39 GPIOs (5 V tolerant on selected pins) → enables compact PCB layout for space-constrained embedded controllers. |
| Power Management | Operating voltage 1.71–3.6 V; low-power modes (Stop/Standby/Shutdown); VBAT backup for RTC → ensures reliable operation across battery-powered and wide-input industrial supplies. |
Pinout & Package
STM32G431CBU6U uses the UFQFPN48 (7 × 7 mm) package with 48 terminals, optimized for thermal performance and board-level density in motor drive and power conversion applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply inputs | Separate 1.71–3.6 V domains enable noise isolation between digital logic and precision analog circuits. |
| VSS, VSSA | Digital & analog ground returns | Dedicated analog ground plane minimizes coupling into ADC/DAC reference paths. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD2 | General-purpose I/Os | 39 total GPIOs; up to 30 support 5 V tolerance - simplifies level-shifting in mixed-voltage systems. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB10, PB11, PB12, PB13, PB14, PB15 | ADC input channels | Supports up to 23-channel simultaneous sampling across dual ADCs for multi-sensor acquisition. |
| PA4, PA5, PA6, PA7, PB0, PB1, PB10, PB11 | DAC output channels | Four independent 12-bit DAC outputs: two buffered (1 MSPS), two unbuffered (15 MSPS) - suitable for waveform generation or analog actuator control. |
| PA8, PA9, PA10, PA11, PA12, PB8, PB9 | USB/UCPD interface signals | Integrated USB 2.0 FS PHY + UCPD controller enables native USB-C PD communication without external transceivers. |
| PA11, PA12, PB8, PB9, PB12, PB13 | FDCAN1 transceiver pins | Direct CAN FD physical layer interface with flexible data-rate support up to 5 Mbit/s - meets automotive and industrial bus requirements. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric computation (sin/cos/tan/atan) in ≤10 cycles - eliminates software library overhead in motor angle estimation. |
| FMAC unit | Dedicated 32-bit filter engine supporting 16-tap FIR and IIR filtering at full CPU clock rate - enables real-time current/voltage harmonic suppression. |
| Advanced motor-control timers | TIM1/TIM8 with 8-channel PWM, dead-time insertion, and emergency stop input - meets IEC 61800-5-2 functional safety timing constraints for inverter gate drivers. |
| VREFBUF | Internal voltage reference buffer with selectable 2.048 V / 2.5 V / 2.9 V outputs - provides stable ADC/DAC reference without external precision voltage sources. |
| Low-power timer (LPTIM1) | 16-bit counter running from ultra-low-power clock domains (e.g., LSE/LSI) - achieves sub-microsecond timing resolution during Stop mode for wake-up event synchronization. |
Applications
| Brushless DC Motor Control | Digital Power Supply Controller |
|---|---|
Use Scenario: Field-oriented control (FOC) of 3-phase BLDC motors in HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of Clarke/Park transforms, PWM generation with <100 ns dead-time accuracy, and ADC-synchronized current sensing. Use Value: Integrated CORDIC/FMAC reduces CPU load by >40% vs. software-based math, enabling higher loop rates (≥20 kHz) within 170 MHz budget. |
Use Scenario: Isolated AC/DC and DC/DC converters with adaptive voltage regulation and fault protection. IC Role / Device Role / Timing Role: Dual ADC sampling of primary-side current/voltage and secondary-side output, coupled with 4-channel DAC-driven error amplifiers. Use Value: Hardware-synchronized dual ADC triggers ensure <±1 LSB phase matching across channels - critical for accurate power stage feedback. |
| Industrial Sensor Hub | USB-C Power Delivery Endpoint |
Use Scenario: Multi-sensor node aggregating temperature, pressure, and vibration data for predictive maintenance gateways. IC Role / Device Role / Timing Role: Simultaneous acquisition from 16+ analog sensors via multiplexed ADC inputs, with on-chip PGA gain adjustment per channel. Use Value: Three accessible op-amps in PGA mode eliminate external instrumentation amps, reducing BOM count and layout area by ≥30%. |
Use Scenario: USB-C powered peripheral (e.g., docking station, monitor) requiring dynamic power contract negotiation and VBUS monitoring. IC Role / Device Role / Timing Role: UCPD controller managing PD messaging, CC line detection, and VBUS discharge control via integrated high-side switches. Use Value: On-die UCPD PHY + protocol stack support eliminates need for discrete PD controllers - cuts system cost and design cycle time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G431KBU6 | Same core/peripherals but in 32-pin LQFP32 package with reduced GPIO count (25) and no FDCAN or USB | Suitable for simpler motor control or sensor nodes where CAN/USB are unnecessary and board space is constrained | Select when footprint and feature count must be minimized, accepting loss of FDCAN and USB functionality |
| STM32G474RET6 | Higher-tier G4 variant: 512 KB Flash, 128 KB SRAM, additional crypto accelerators, same UFQFPN48 package | Required for firmware-over-the-air (FOTA) updates, secure boot, or complex GUI-driven HMI applications | Choose when extended memory, cryptographic services, or future-proofing against firmware growth is essential |
Compared with STM32G431KBU6, the STM32G431CBU6U adds FDCAN and USB 2.0 FS + UCPD - critical for automotive diagnostics and USB-C PD endpoints; versus STM32G474RET6, it trades memory and crypto for lower cost and identical analog/motor-control capability in resource-constrained designs.
Availability
STM32G431CBU6U is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor hubs, and USB-C PD endpoints requiring stable component supply across production lifecycles.
Supply support for STM32G431CBU6U 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, analog-rich embedded applications - specifically engineered for digital power conversion, motor control, and real-time signal processing with hardware math acceleration and robust peripheral integration.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32G431CBU6U operates at up to 170 MHz with an ART Accelerator enabling zero-wait-state Flash execution, delivering 213 DMIPS (Dhrystone 2.1). This performance level is validated across the full temperature range (–40°C to +85°C) and supply voltage (1.71–3.6 V), making it suitable for deterministic real-time control tasks such as motor commutation and digital power loop regulation.
Does this MCU support hardware-accelerated trigonometric functions?
Yes - the integrated CORDIC (Coordinate Rotation Digital Computer) unit executes sin, cos, atan, and magnitude calculations in hardware with single-cycle latency for basic operations and ≤10 cycles for full-precision results. This eliminates reliance on software libraries, reducing CPU load and jitter in field-oriented control (FOC) algorithms and sensor fusion routines.
What analog features differentiate the G431 from earlier STM32 families?
The G431 integrates three rail-to-rail op-amps with all terminals exposed for PGA configuration, dual 16-bit ADCs with hardware oversampling and synchronized triggering, four 12-bit DACs (two buffered, two unbuffered), and a programmable VREFBUF with three output voltages. These features enable complete analog front-end implementation without external signal-conditioning ICs - a significant enhancement over G0/G1 series.
Is FDCAN supported, and what data rates does it achieve?
Yes - the STM32G431CBU6U includes one FDCAN controller compliant with ISO 11898-1:2015, supporting classical CAN (up to 1 Mbit/s) and CAN FD (up to 5 Mbit/s) with flexible data-rate switching. It features dedicated message RAM, Tx/Rx FIFOs, and automatic retransmission - meeting requirements for automotive diagnostics and industrial fieldbus communication.
STM32G431CBU6U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32G4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4F
- Core Size:
- 32-Bit Single-Core
- Speed:
- 170MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 42
- 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 18x12b; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G431CBU6U FAQ
1.How can I place an order for STM32G431CBU6U through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431CBU6U 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 STM32G431CBU6U reliable?
The price and inventory of STM32G431CBU6U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431CBU6U is usually 5 days.
3.What payment methods are accepted for STM32G431CBU6U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431CBU6U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431CBU6U?
STM32G431CBU6U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431CBU6U 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 STM32G431CBU6U?
For technical support, including STM32G431CBU6U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431CBU6U requirements.
6.How does Aetrix verify that STM32G431CBU6U is sourced from the original manufacturer or authorized distributors?
All STM32G431CBU6U 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 STM32G431CBU6U meets industry standards.
7.What is the process for return or replacement of STM32G431CBU6U?
All STM32G431CBU6U units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431CBU6U, 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 STM32G431CBU6U part is unused and in its original packaging.
Return procedure for STM32G431CBU6U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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