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STMicroelectronics STM32G431KBU6
- Part No.:
- STM32G431KBU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32G431KBU6.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
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Product details
Overview
STM32G431KBU6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU and hardware math accelerators (CORDIC, FMAC), operating at 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), 4 comparators, and 3 op-amps - deployed in motor control, digital power conversion, and industrial sensing systems.
For engineers reviewing the STM32G431KBU6 datasheet, STM32G431KBU6 pinout, STM32G431KBU6 application, or STM32G431KBU6 equivalent, key selection criteria include FDCAN support for automotive-grade communication, ultra-fast rail-to-rail analog comparators for overcurrent protection, CORDIC/FMAC acceleration for real-time motor algorithms, and UCPD interface for USB Type-C™ power delivery implementation.
Technical Context
The STM32G431KBU6 integrates an Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz, alongside a Memory Protection Unit (MPU) and DSP instruction set for deterministic real-time control. Its dual-bank Flash architecture supports secure firmware updates with PCROP and 1 KB OTP for configuration storage.
Analog subsystem integration includes two independent 16-bit ADCs with hardware oversampling (up to 23 channels, 0–3.6 V range), four ultra-fast comparators with programmable hysteresis, and three rail-to-rail op-amps configurable as programmable gain amplifiers (PGA) with all terminals accessible - enabling sensor signal conditioning and closed-loop feedback without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 170 MHz max frequency, 213 DMIPS performance - enables real-time motor control and digital power loop execution within single interrupt latency budget. |
| Memory | 128 KB Flash (ECC, PCROP, securable area), 22 KB SRAM + 10 KB CCM-SRAM (parity-checked) - supports dual-bank firmware update and safety-critical data retention during low-power modes. |
| Analog Peripherals | 2 × 16-bit ADCs (0.25 µs conversion, 23 ch), 4 × comparators, 3 × op-amps (PGA mode), 4 × 12-bit DACs - allows full analog front-end integration for current/voltage sensing and actuator drive in compact designs. |
| Math Acceleration | CORDIC (trigonometric functions), FMAC (filtering), routine booster (CCM-SRAM) - reduces CPU load for field-oriented control (FOC) and adaptive filtering by >40% vs. software-only implementation. |
| Communication | FDCAN (flexible data-rate), 4 × USART/LPUART, 3 × SPI/I²S, USB FS with LPM/BCD, UCPD controller - enables robust multi-protocol connectivity for industrial gateways and USB-C PD sink applications. |
| Power Management | VDD/VDDA: 1.71–3.6 V; low-power modes (sleep/stop/standby/shutdown); VBAT backup for RTC; PVD and BOR - ensures reliable operation across wide input ranges and battery-backed timekeeping in portable equipment. |
Pinout & Package
STM32G431KBU6 is housed in a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch), optimized for space-constrained motor drives and digital power converters. Pin layout supports full peripheral mapping with 26 GPIOs (5 V tolerant on selected pins), dedicated analog inputs, and high-speed clock routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply | Separate 1.71–3.6 V domains enable noise isolation between digital logic and precision analog circuits; decoupling required per datasheet layout guidelines. |
| PA0–PA15, PB0–PB15, PC0–PC15 | General-purpose I/O | 26 total GPIOs; multiple pins support 5 V tolerance, timer channels, ADC/DAC/comp/OPAMP alternate functions - simplifies PCB routing for mixed-signal signal chains. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7 | Analog input / DAC output | Direct connection to ADC1/ADC2 inputs and DAC1/DAC2 outputs - enables simultaneous sampling and waveform generation without external muxing or buffering. |
| PA11, PA12, PB9, PB15 | USB D+/D−, UCPD CC1/CC2 | Integrated USB 2.0 FS transceiver and UCPD PHY - eliminates need for external USB-C controller in sink-side PD applications. |
| PA8–PA15, PB0–PB1, PB10–PB11 | FDCAN TX/RX, timers, comparators | Dedicated FDCAN1 pins with internal termination; advanced timers (TIM1/TIM8) with dead-time control - supports Class B motor control compliance and ISO 11898-1 CAN FD physical layer. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric computation (sin/cos/atan/sqrt) in ≤20 cycles - cuts FOC angle calculation latency by 8× vs. floating-point library, enabling 20 kHz motor PWM loops. |
| FMAC unit | 16×16-bit MAC with 32-bit accumulator and 4-stage pipeline - executes FIR/IIR filters at 100+ MOPS, offloading DSP tasks from CPU in active noise cancellation or sensor fusion. |
| Advanced motor timers | TIM1/TIM8 with 8-channel PWM, programmable dead time, emergency stop, and quadrature encoder input - supports 3-phase BLDC/PMSM commutation and position feedback in single-chip inverters. |
| UCPD controller | Integrated USB Type-C™ Power Delivery PHY and protocol engine - implements sink-side PD negotiation (voltage/current selection, role swap) without external MCU or PD controller IC. |
| VREFBUF | Internal voltage reference buffer with selectable 2.048 V / 2.5 V / 2.9 V outputs - provides stable, low-noise reference for ADC/DAC/COMP without external precision voltage source. |
Applications
| Industrial Motor Drive | Digital Power Supply |
|---|---|
|
Use Scenario: Closed-loop field-oriented control of 3-phase BLDC motors in HVAC blowers and pump inverters. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, generating 6-channel PWM with dead-time insertion, sampling current via dual ADCs, and managing thermal protection. Use Value: CORDIC/FMAC acceleration enables 20 kHz PWM loop closure; integrated op-amps condition shunt amplifier signals; FDCAN reports fault status to master PLC. |
Use Scenario: 1–3 kW AC/DC and DC/DC power supplies with adaptive voltage regulation and digital monitoring. IC Role / Device Role / Timing Role: Digital power controller performing PID voltage/current regulation, sequencing, and protection using ADC/DAC/comparators, with USB-C PD negotiation via UCPD. Use Value: Dual 16-bit ADCs sample primary/secondary side voltages simultaneously; 4 comparators provide <100 ns overvoltage/overcurrent trip; UCPD manages sink-side PD contract negotiation. |
| Smart Sensor Node | USB-C Power Delivery Sink |
|
Use Scenario: Battery-powered industrial sensor node with vibration, temperature, and pressure sensing. IC Role / Device Role / Timing Role: Low-power host MCU acquiring analog sensor data via ADC/OPAMP, processing with CORDIC-based FFT, and transmitting via LPUART/USB. Use Value: Shutdown mode draws <30 nA; VBAT-backed RTC maintains time stamping; internal VREFBUF ensures ADC accuracy across battery discharge curve. |
Use Scenario: Laptop dock, monitor, or portable charger requiring USB-C PD sink functionality with variable voltage negotiation. IC Role / Device Role / Timing Role: Dedicated UCPD controller handling PD messaging, policy engine, and VBUS control, coordinated with main application firmware via shared memory. Use Value: Integrated UCPD PHY eliminates external PD controller; supports Programmable Power Supply (PPS) down to 20 mV steps; USB FS interface enables vendor-defined commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G431CBT6 | LQFP48 package (48 pins), +22 GPIOs, same core/peripherals but no UCPD block | Suitable for motor control where USB-C PD is not required; larger footprint allows easier routing of high-current traces | Select when additional GPIOs or external USB-C controller is acceptable; avoid if board space or integrated PD is critical. |
| STM32G474RET6 | LQFP64, 512 KB Flash, 128 KB SRAM, added AES/SHA crypto, no UCPD | Targeted at secure IoT edge nodes requiring firmware encryption and TLS stack acceleration | Choose for security-sensitive applications needing cryptographic acceleration; not drop-in due to pin count, Flash size, and missing UCPD. |
Compared with STM32G431KBU6, STM32G431CBT6 offers more I/O but lacks UCPD, making it unsuitable for native USB-C PD sink designs; STM32G474RET6 adds security features but increases cost and footprint while removing UCPD - neither matches the KBU6's unique combination of compact UFQFPN32 packaging, integrated UCPD, and motor/power analog subsystems.
Availability
STM32G431KBU6 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, smart sensor nodes, and USB-C PD sink devices requiring stable component supply across extended product lifecycles.
Supply support for STM32G431KBU6 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 management ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32G4 series targets high-performance, cost-sensitive digital power and motor control applications, integrating math accelerators, rich analog peripherals, and USB-C PD capability into a single chip to replace multi-IC solutions.
FAQ
What is the maximum operating frequency and associated performance metric of the STM32G431KBU6?
The STM32G431KBU6 operates at up to 170 MHz with an ART Accelerator enabling zero-wait-state Flash execution. Its performance is rated at 213 DMIPS (Dhrystone MIPS), measured per EEMBC benchmark methodology, and includes full DSP instruction support and single-cycle MAC operations for real-time signal processing.
Does the STM32G431KBU6 support USB Type-C™ Power Delivery as a sink device?
Yes - the STM32G431KBU6 integrates a full USB Type-C™ Power Delivery (UCPD) controller with physical layer (PHY), protocol engine, and VBUS switch control logic. It supports sink-side PD negotiation (including PPS), role swapping, and vendor-defined messages via its dedicated UCPD peripheral and associated registers.
How many analog-to-digital converters does the STM32G431KBU6 include, and what are their key resolution and speed specifications?
The STM32G431KBU6 includes two independent 16-bit ADCs (ADC1 and ADC2), each supporting up to 23 input channels. Conversion time is as fast as 0.25 µs (4 MSPS), with hardware oversampling up to 16× to achieve effective resolution beyond 16 bits. Input voltage range is 0 to 3.6 V, referenced to VREFINT or external VREF+.
What low-power modes are supported, and what is the typical current consumption in shutdown mode?
The STM32G431KBU6 supports Sleep, Stop, Standby, and Shutdown modes. In Shutdown mode (with VDD/VDDA powered down and VBAT active), typical current consumption is 30 nA at 25°C, preserving RTC and backup registers. Full wake-up from Shutdown takes ≤5 µs, and the device retains its 96-bit unique ID and calibration data.
STM32G431KBU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-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:
- 26
- 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 11x12b; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G431KBU6 FAQ
1.How can I place an order for STM32G431KBU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431KBU6 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 STM32G431KBU6 reliable?
The price and inventory of STM32G431KBU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431KBU6 is usually 5 days.
3.What payment methods are accepted for STM32G431KBU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431KBU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431KBU6?
STM32G431KBU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431KBU6 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 STM32G431KBU6?
For technical support, including STM32G431KBU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431KBU6 requirements.
6.How does Aetrix verify that STM32G431KBU6 is sourced from the original manufacturer or authorized distributors?
All STM32G431KBU6 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 STM32G431KBU6 meets industry standards.
7.What is the process for return or replacement of STM32G431KBU6?
All STM32G431KBU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431KBU6, 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 STM32G431KBU6 part is unused and in its original packaging.
Return procedure for STM32G431KBU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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