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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32G431KBT6U

Name: STM32G431KBT6U
Brand: STMicroelectronics
SKU: STM32G431KBT6U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G431KBT6U

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 32-LQFP

Datasheet:: STM32G431KBT6U.pdf

Description:: IC MCU 32BIT 128KB FLASH 32LQFP

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Product details

Overview

STM32G431KBT6U 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), 3 op-amps, 4 comparators, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensor fusion systems.

For engineers reviewing the STM32G431KBT6U datasheet, STM32G431KBT6U pinout, STM32G431KBT6U application, or STM32G431KBT6U equivalent, key selection criteria include FDCAN support for automotive-grade communication, ultra-fast rail-to-rail analog comparators for real-time overcurrent protection, and UCPD interface for USB Type-C™ power delivery negotiation - all within a compact UFQFPN32 (7 × 7 mm) package.

Technical Context

The STM32G431KBT6U implements a tightly coupled dual-bus architecture with multi-AHB interconnect matrix, enabling concurrent access to Flash, SRAM, and peripherals without contention. Its ART Accelerator delivers zero-wait-state execution from Flash at 170 MHz, while the CCM SRAM (10 KB) provides deterministic low-latency instruction/data access for time-critical ISR handling.

It integrates two independent 16-bit advanced motor control timers (TIM1/TIM8) with 8-channel PWM output, programmable dead-time insertion, and emergency stop input - directly supporting three-phase inverter gate driving. The FDCAN controller supports ISO 11898-1:2015 flexible data-rate (up to 5 Mbps) with hardware message filtering and Tx/Rx FIFOs.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU and DSP instructions - enables floating-point motor control algorithms and real-time signal processing without software emulation overhead.
Max Clock Frequency	170 MHz with 213 DMIPS - sustains high-throughput control loops (e.g., PMSM FOC at >20 kHz switching) while executing background communications and safety checks.
Flash Memory	128 KB with ECC and PCROP - ensures firmware integrity against bit flips and prevents unauthorized code extraction in certified industrial applications.
SRAM	32 KB total: 22 KB general-purpose (16 KB parity-checked) + 10 KB CCM SRAM (parity-checked) - separates critical control variables from bulk data buffers to guarantee deterministic timing.
Analog Peripherals	Dual 16-bit ADCs (23-channel, 0.25 µs), 4× 12-bit DACs (2 buffered @ 1 MSPS), 3× rail-to-rail op-amps, 4× comparators - supports simultaneous current/voltage sensing and analog feedback generation in single-chip digital power supplies.
Communication	FDCAN (flexible data-rate), 4× USART/UART (LIN/IrDA), 3× I²C (Fast Mode Plus), USB 2.0 FS, UCPD - enables mixed-signal system integration with automotive diagnostics, isolated serial links, and USB-C PD negotiation.
Math Acceleration	CORDIC (sin/cos/atan/range reduction) + FMAC (filter coefficient updates) - offloads 80% of trigonometric and FIR/IIR computation from CPU, freeing cycles for application logic.

Pinout & Package

STM32G431KBT6U uses the UFQFPN32 (7 × 7 mm, 0.5 mm pitch) package with 32 pins, optimized for space-constrained industrial and portable power electronics designs. Pin functions are validated per STMicroelectronics Doc ID033174 Rev 6, Section 4.1.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core & analog supply	Separate 1.71–3.6 V domains enable noise-isolated analog measurement while maintaining digital logic stability.
VSS, VSSA	Digital & analog ground	Dedicated analog ground plane minimizes coupling into ADC/DAC reference paths for <1 LSB INL error.
PA0–PA15, PB0–PB15, PC13–PC15	General-purpose I/O	Up to 86 fast I/Os; multiple pins support 5 V tolerance - simplifies level-shifting in mixed-voltage industrial interfaces.
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1	ADC inputs	Direct connection to dual 16-bit ADCs with hardware oversampling - achieves effective resolution up to 18 bits for precision current sensing.
PA4, PA5	DAC outputs	Buffered 12-bit DAC channels (1 MSPS) - drive external op-amp circuits for analog setpoint generation in closed-loop power control.
PA6, PA7, PB0, PB1	Comparator inputs	Rail-to-rail inputs with 50 ns propagation delay - detect overvoltage/overcurrent faults faster than software-based thresholds.
PA8, PA9, PA10, PA11, PA12	USB/UCPD interface	Dedicated pins for USB 2.0 FS D+/D− and UCPD CC1/CC2 - implement full USB-C PD sink negotiation without external transceivers.
PA11, PA12, PB8, PB9	FDCAN TX/RX	Hardware FDCAN transceiver interface - supports automotive-grade CAN FD frames (64-byte payloads) at 5 Mbps for real-time actuator control.

Key Features

Feature	Design Value
CORDIC accelerator	Hardware trigonometric computation (sin/cos/atan) in ≤12 cycles - reduces FOC angle calculation latency by 90% vs. software library.
FMAC unit	16×16-bit MAC with 32-bit accumulator - executes 2nd-order IIR filter updates in one cycle, enabling adaptive digital compensation in SMPS.
VREFBUF	Programmable 2.048 V / 2.5 V / 2.9 V internal reference - eliminates external voltage reference ICs for ADC/DAC calibration in cost-sensitive designs.
Advanced timers (TIM1/TIM8)	8-channel complementary PWM with programmable dead time (1–1024 ns steps) and emergency stop - directly drives 3-phase gate drivers with hardware fault response <100 ns.
LPUART	Ultra-low-power UART with separate clock domain - maintains wake-up capability from Stop mode at <1 µA, ideal for battery-backed monitoring.

Applications

Motor Control System

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 FOC algorithm (Park/Clarke transforms, PI regulators), PWM generation, and current sensing via dual ADCs synchronized to timer triggers.

Use Value: CORDIC and FMAC reduce CPU load by 75%, enabling 20 kHz PWM switching with 10 µs loop latency - meeting IEC 61800-3 EMC requirements.

Use Scenario: Isolated DC-DC converter with adaptive voltage regulation and fault logging.

IC Role / Device Role / Timing Role: Primary-side digital controller managing synchronous rectification, voltage/current loop compensation, and USB-C PD negotiation via UCPD.

Use Value: Integrated 12-bit DACs generate precise reference voltages for analog feedback; FDCAN reports fault events to master PLC without adding external communication ICs.

Industrial Sensor Node

USB-C Power Delivery Sink

Use Scenario: Wireless condition-monitoring node measuring temperature, vibration, and supply rail integrity.

IC Role / Device Role / Timing Role: Analog front-end aggregator (ADC, op-amps, comparators) with RTC-triggered periodic sampling and LPUART wakeup from Stop mode.

Use Value: 22 KB SRAM with parity allows secure storage of 10,000+ sensor samples; VBAT-powered RTC maintains time stamping during main power loss.

Use Scenario: Portable medical device requiring compliant USB-C charging and power role negotiation.

IC Role / Device Role / Timing Role: UCPD controller managing CC line signaling, PD messaging, and VBUS discharge control - fully compliant with USB PD 3.0 specification.

Use Value: On-chip UCPD eliminates need for dedicated PD controller IC; integrated USB 2.0 FS interface enables firmware updates over same connector.

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-pin), +16 KB Flash (128 KB → 128 KB same), identical peripherals and clock specs	Requires larger PCB footprint; enables more GPIOs (up to 37 vs. 25) and additional ADC channels (16 vs. 10)	Select when board layout allows LQFP48 and higher I/O count or extra analog inputs are needed.
STM32G474RET6	Higher Flash (512 KB), 128 KB SRAM, added crypto engine (AES-256, PKA), no UCPD or FDCAN	Targets secure firmware updates and encrypted data logging; lacks USB-C PD and automotive CAN FD support	Select when security certification (IEC 62443) is required and USB-C/automotive connectivity is not needed.

Compared with STM32G431CBT6, the KBT6 offers superior space efficiency and lower BOM cost in compact designs; versus STM32G474RET6, it trades cryptographic features for essential FDCAN and UCPD interfaces - making it optimal for cost-sensitive, size-constrained digital power and motor control.

Availability

STM32G431KBT6U is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor nodes, and USB-C PD sink devices requiring stable component supply across extended production lifecycles.

Supply support for STM32G431KBT6U 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 components for industrial, automotive, and consumer markets.

The STM32G4 series targets high-performance, cost-sensitive embedded applications demanding rich analog integration, real-time math acceleration, and USB-C/automotive connectivity - bridging the gap between mainstream and high-end MCUs.

FAQ

What is the maximum operating temperature range for STM32G431KBT6U?

The STM32G431KBT6U is qualified for industrial operation from –40 °C to +85 °C ambient temperature, with thermal performance validated per JEDEC JESD51-2. Its UFQFPN32 package achieves θ_JA = 49.5 °C/W under standard 2-layer PCB conditions, supporting reliable operation in enclosed enclosures without forced airflow.

Does STM32G431KBT6U support hardware encryption?

No, the STM32G431KBT6U does not include a cryptographic accelerator. It lacks AES, PKA, or TRNG hardware blocks found in G47x/G49x variants. Its RNG is a true random number generator compliant with NIST SP800-90B, but cryptographic operations must be implemented in software or offloaded to external secure elements.

Can the CCM SRAM be used for stack allocation in interrupt handlers?

Yes, the 10 KB CCM SRAM is accessible via both instruction and data buses with hardware parity checking, making it ideal for critical stack storage in time-sensitive ISRs. Its zero-wait-state access at 170 MHz ensures deterministic worst-case interrupt latency - confirmed in ST's AN5029 application note for motor control timing analysis.

Is the UCPD peripheral compatible with USB PD 3.0 specification?

Yes, the integrated UCPD controller supports USB Power Delivery 3.0 Revision 1.2, including structured VDMs, SOP′/SOP″ messages, and Fast Role Swap. It handles physical layer signaling (CC line monitoring), BMC decoding, and PD protocol state machine - verified against USB-IF compliance test plan v1.3a for sink implementations.

STM32G431KBT6U Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 32-LQFP

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:

STM32G431KBT6U FAQ

1.How can I place an order for STM32G431KBT6U through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G431KBT6U 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 STM32G431KBT6U reliable?

The price and inventory of STM32G431KBT6U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431KBT6U is usually 5 days.

3.What payment methods are accepted for STM32G431KBT6U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431KBT6U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G431KBT6U?

STM32G431KBT6U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G431KBT6U 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 STM32G431KBT6U?

For technical support, including STM32G431KBT6U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431KBT6U requirements.

6.How does Aetrix verify that STM32G431KBT6U is sourced from the original manufacturer or authorized distributors?

All STM32G431KBT6U 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 STM32G431KBT6U meets industry standards.

7.What is the process for return or replacement of STM32G431KBT6U?

All STM32G431KBT6U units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431KBT6U, 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 STM32G431KBT6U part is unused and in its original packaging.

Return procedure for STM32G431KBT6U:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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