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STMicroelectronics STM32G431CBU3

Name: STM32G431CBU3
Brand: STMicroelectronics
SKU: STM32G431CBU3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G431CBU3

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-UFQFN Exposed Pad

Datasheet:: STM32G431CBU3.pdf

Description:: IC MCU 32BIT 128KB FLSH 48UFQFPN

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Product details

Overview

STM32G431CBU3 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 (including 10 KB CCM-SRAM with parity), and integrated analog peripherals including dual 12-bit DACs (2 buffered @ 1 MSPS), dual 12-bit ADCs (0.25 µs conversion), 4 rail-to-rail comparators, and 3 operational amplifiers-designed for precision motor control and digital power conversion systems.

For engineers reviewing the STM32G431CBU3 datasheet, STM32G431CBU3 pinout, STM32G431CBU3 application, or STM32G431CBU3 equivalent, key selection considerations include its UFQFPN32 package footprint, FDCAN support for flexible data-rate automotive communication, CORDIC/FMAC hardware accelerators for real-time trigonometric and filtering math, and UCPD interface for USB Type-C™ power delivery control.

Technical Context

The STM32G431CBU3 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 PCROP and ECC, plus 32 KB SRAM segmented into 22 KB general-purpose SRAM (16 KB with parity) and 10 KB CCM-SRAM on both instruction and data buses.

Analog integration centers on two independent 12-bit ADCs (up to 23 channels, 0–3.6 V range, hardware oversampling), four ultra-fast comparators, three op-amps configurable as programmable-gain amplifiers (PGA), and a voltage reference buffer (VREFBUF) supporting 2.048 V, 2.5 V, and 2.9 V outputs-enabling closed-loop analog signal conditioning without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU, 170 MHz max frequency (213 DMIPS), MPU, DSP instructions
Memory	128 KB Flash (ECC, PCROP, 1 KB OTP), 32 KB SRAM (22 KB + 10 KB CCM-SRAM, hardware parity on 16 KB)
Analog Peripherals	2× 12-bit ADCs (0.25 µs, 23 ch, 0–3.6 V), 4× comparators, 3× op-amps (PGA mode), 4× 12-bit DACs (2 buffered @ 1 MSPS)
Math Accelerators	CORDIC for sin/cos/tan/atan/range reduction; FMAC for FIR/IIR filter acceleration
Timers & Control	14 timers including 2× 16-bit advanced motor-control timers (8 PWM, dead-time, emergency stop), LPTIM1, RTC with alarm/wakeup
Communication	FDCAN (flexible data rate), 4× USART/UART (LIN/IrDA/ISO7816), 3× I²C (Fast Mode Plus), 3× SPI, USB 2.0 FS, UCPD, SAI
Package	UFQFPN32 (5 × 5 mm, 0.5 mm pitch, 32-pin, exposed thermal pad)

Pinout & Package

STM32G431CBU3 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package with 0.5 mm pitch and an exposed thermal pad for enhanced thermal dissipation in compact motor drive and power supply designs.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core & analog power supply	1.71–3.6 V operation; separate analog domain ensures ADC/DAC accuracy
VSS, VSSA	Ground reference	Dedicated analog ground pins reduce noise coupling into sensitive analog circuits
PA0–PA15, PB0–PB15, PC13–PC15	General-purpose I/O	Up to 86 fast I/Os; multiple pins 5 V tolerant for mixed-voltage system interfacing
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1	ADC input channels	Support simultaneous sampling across dual ADCs for current/voltage sensing in 3-phase motor control
PA4, PA5, PA6, PA7	DAC output channels	2 buffered external DACs (PA4/PA5) and 2 unbuffered internal DACs (PA6/PA7) for waveform generation or reference synthesis
PA11, PA12, PB9, PB10	USB D+/D−, I²C SCL/SDA	Native USB 2.0 full-speed interface with LPM/BCD; Fast Mode Plus I²C supports 1 Mbit/s and 20 mA sink
PA13, PA14, PA15	SWD debug interface	Serial Wire Debug (SWD) only-no JTAG pins in UFQFPN32 variant; minimal 3-pin debug footprint
NRST	Active-low reset input	External reset assertion resets CPU, peripherals, and clocks; supports programmable voltage detector (PVD) monitoring

Key Features

Feature	Design Value
CORDIC accelerator	Hardware trigonometric computation (sin/cos/tan/atan) in ≤15 cycles-replaces software libraries for real-time motor angle estimation
FMAC unit	Dedicated filter math engine supporting 32-bit MAC operations for real-time FIR/IIR filtering in digital power control loops
Advanced motor timers (TIM1/TIM8)	8-channel PWM generation with programmable dead time, complementary outputs, and emergency stop input for BLDC/PMSM inverter control
VREFBUF	On-chip voltage reference buffer with selectable 2.048 V / 2.5 V / 2.9 V outputs-eliminates need for external precision references in ADC/DAC calibration paths
UCPD peripheral	Integrated USB Type-C™ Power Delivery controller supporting source/sink role negotiation, CC line monitoring, and VCONN switching

Applications

Motor Control System

Digital Power Supply

Use Scenario: Field-oriented control (FOC) of 3-phase BLDC/PMSM motors in industrial drives and e-bike controllers.

IC Role / Device Role / Timing Role: Primary MCU executing FOC algorithm, ADC-sampled current/voltage acquisition, PWM generation, and fault handling via advanced timers and comparators.

Use Value: CORDIC enables real-time rotor angle calculation; FMAC accelerates current loop filtering; dual ADCs allow synchronous sampling of all three phase currents.

Use Scenario: Isolated AC/DC and DC/DC converters with adaptive voltage regulation and digital compensation.

IC Role / Device Role / Timing Role: Digital controller managing feedback loop (via ADC), generating gate-drive PWM (via TIM1/TIM8), and implementing protection logic using comparators and op-amps.

Use Value: Hardware VREFBUF provides stable reference for ADC/DAC; op-amps serve as error amplifiers; UCPD enables USB-C PD negotiation in adapter designs.

USB-C Power Delivery Hub

Industrial Sensor Node

Use Scenario: Multi-port USB-C hub with dynamic power allocation, cable orientation detection, and VCONN management.

IC Role / Device Role / Timing Role: UCPD controller managing CC line signaling, PD protocol stack, and power path switching; USB peripheral handles enumeration and vendor commands.

Use Value: Integrated UCPD eliminates external PD controller IC; FDCAN supports diagnostics over vehicle networks; low-power timers enable precise sleep/wakeup scheduling.

Use Scenario: Battery-powered condition-monitoring node with analog sensor front-end, local processing, and wireless telemetry.

IC Role / Device Role / Timing Role: Signal conditioner (op-amps, ADC), data processor (CORDIC/FMAC), and communication host (LPUART, I²C) with ultra-low-power operation.

Use Value: 1.71–3.6 V operation extends battery life; standby mode consumes <1.5 µA; internal temperature sensor and VREFINT enable self-calibration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G431KBU3	Same core/peripherals, but in 32-pin LQFP package (7 × 7 mm); no exposed thermal pad	LQFP simplifies hand-soldering and prototyping; lower thermal performance than UFQFPN in high-duty-cycle motor control	Select for lab validation or low-volume production where thermal constraints are relaxed and PCB assembly favors LQFP.
STM32G474RET6	Higher Flash (512 KB), larger SRAM (128 KB), additional peripherals (2x SAI, more timers), LQFP64 package	Targeted at complex audio processing or multi-axis motion control requiring expanded memory and I/O count	Choose when scaling beyond single-motor control or adding USB audio, Ethernet, or dual CAN interfaces.

Compared with STM32G431KBU3, the CBU3 offers superior thermal performance in space-constrained motor drives; versus STM32G474RET6, it delivers optimal cost/performance for single-axis FOC or USB-C PD endpoints without over-provisioning memory or I/O.

Availability

STM32G431CBU3 is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, USB-C power delivery endpoints, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM32G431CBU3 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, analog, MEMS, and automotive ICs with vertical manufacturing capabilities and broad industrial certification coverage.

The STM32G4 series targets high-efficiency digital power conversion and real-time motor control, integrating math accelerators (CORDIC/FMAC), precision analog, and USB-C UCPD to replace discrete signal-chain components in compact, cost-sensitive applications.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the STM32G431CBU3?

The STM32G431CBU3 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1). This is achieved using the ART Accelerator for zero-wait-state Flash execution and includes full DSP instruction support and single-precision floating-point unit (FPU) for real-time mathematical workloads.

Does the STM32G431CBU3 support USB Type-C™ Power Delivery, and what hardware blocks enable it?

Yes-the STM32G431CBU3 integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller. It includes physical layer transceivers for CC1/CC2 line monitoring, VCONN switching, BMC encoding/decoding, and PD protocol stack support via firmware libraries, eliminating the need for an external PD controller IC in endpoint designs.

How many ADC and DAC channels does the STM32G431CBU3 provide, and what are their key timing specifications?

It features two independent 12-bit ADCs supporting up to 23 channels total with 0.25 µs conversion time and hardware oversampling. It also provides four 12-bit DAC channels: two buffered external outputs (PA4/PA5) rated at 1 MSPS, and two unbuffered internal outputs (PA6/PA7) rated at 15 MSPS-suitable for waveform generation and reference synthesis.

What low-power modes are supported, and what is the typical current consumption in Standby mode?

The device supports Sleep, Stop (0/1), Standby, and Shutdown modes. In Standby mode-with RTC running and backup registers retained-the typical current consumption is 0.8 µA at 25 °C and 3.3 V, with VBAT supply maintaining RTC and backup SRAM functionality during main power removal.

STM32G431CBU3 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 ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G431CBU3 FAQ

1.How can I place an order for STM32G431CBU3 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G431CBU3 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 STM32G431CBU3 reliable?

The price and inventory of STM32G431CBU3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431CBU3 is usually 5 days.

3.What payment methods are accepted for STM32G431CBU3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431CBU3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G431CBU3?

STM32G431CBU3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G431CBU3 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 STM32G431CBU3?

For technical support, including STM32G431CBU3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431CBU3 requirements.

6.How does Aetrix verify that STM32G431CBU3 is sourced from the original manufacturer or authorized distributors?

All STM32G431CBU3 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 STM32G431CBU3 meets industry standards.

7.What is the process for return or replacement of STM32G431CBU3?

All STM32G431CBU3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431CBU3, 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 STM32G431CBU3 part is unused and in its original packaging.

Return procedure for STM32G431CBU3:

1.Submit a request within 90 days.

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

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