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

STMicroelectronics STM32G431RBI3TR

Name: STM32G431RBI3TR
Brand: STMicroelectronics
SKU: STM32G431RBI3TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G431RBI3TR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-UFBGA

Datasheet:: STM32G431RBI3TR.pdf

Description:: IC MCU 32BIT 128KB FLASH 64UFBGA

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Product details

Overview

STM32G431RBI3TR 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, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G431RBI3TR datasheet, STM32G431RBI3TR pinout, STM32G431RBI3TR application, or STM32G431RBI3TR equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support, 5 V-tolerant I/Os, hardware RNG, and UCPD interface for USB Type-C™ power delivery implementations.

Technical Context

The STM32G431RBI3TR 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 ECC-protected Flash, 22 KB SRAM with parity on first 16 KB, and 10 KB CCM SRAM with parity - all accessible via multi-AHB interconnect matrix.

Analog integration centers on two independent 12-bit ADCs (up to 23 channels, 16-bit oversampling), four rail-to-rail comparators, three user-configurable op-amps (including PGA mode), and dual 12-bit DACs - one pair buffered (1 MSPS), one unbuffered (15 MSPS) - supported by internal VREFBUF (2.048 V / 2.5 V / 2.9 V).

Key Specifications

Parameter	Value and Actual Design Meaning
Core	Arm Cortex-M4 with FPU, 170 MHz max, 213 DMIPS - enables real-time DSP and control loop execution without external co-processor.
Memory	128 KB Flash (ECC, PCROP), 22 KB SRAM + 10 KB CCM SRAM (parity-checked) - supports secure firmware storage and deterministic low-latency data buffering.
ADC	Dual 12-bit, 0.25 µs conversion, up to 23 channels, hardware oversampling to 16-bit - suitable for high-resolution current/voltage sampling in servo drives.
DAC	4 × 12-bit: 2 buffered (1 MSPS), 2 unbuffered (15 MSPS) - enables simultaneous analog waveform generation and fast feedback signal injection.
Timers	14 timers including 2 × 16-bit advanced motor control timers (8 PWM channels, dead-time insertion, emergency stop) - directly supports 3-phase BLDC/PMSM commutation.
Communication	FDCAN (flexible data-rate), 4 × USART, 3 × SPI, 3 × I²C, LPUART, USB FS, UCPD - integrates CAN FD for automotive diagnostics and USB-C PD negotiation in compact power adapters.
Math Acceleration	CORDIC (trig/log/exp), FMAC (filtering) - offloads 32-bit floating-point computations from CPU, reducing interrupt latency in field-oriented control (FOC).

Pinout & Package

STM32G431RBI3TR uses a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN) package (7 × 7 mm, 0.5 mm pitch), optimized for space-constrained industrial and consumer power electronics.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core & analog supply	1.71–3.6 V operation; separate analog domain ensures stable reference for ADC/DAC/OPAMP precision.
VSS, VSSA	Digital & analog ground	Independent grounding reduces noise coupling between digital switching and sensitive analog circuits.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2	General-purpose I/O	Up to 38 GPIOs; multiple pins support 5 V tolerance and remappable alternate functions (e.g., TIM1_CH1, ADC1_IN0, USART1_TX).
PA13/PA14/PA15	SWD debug interface	Serial Wire Debug (SWD) pins enable in-circuit programming and real-time trace without JTAG overhead.
PA11/PA12	USB D+/D−	Dedicated full-speed USB 2.0 transceivers with built-in termination - no external PHY required for HID or CDC-class devices.
PA13/PA14	UCPD CC1/CC2	USB Type-C™ configuration channel interface for plug orientation detection and power role negotiation.

Key Features

Feature	Design Value
CORDIC accelerator	Hardware trigonometric/logarithmic computation in ≤10 cycles - cuts FOC angle calculation latency by >70% vs. software library.
FMAC unit	16×32-bit MAC operations per cycle - accelerates FIR/IIR filtering for EMI suppression and sensor noise reduction in real time.
Advanced motor timers (TIM1/TIM8)	8-channel complementary PWM with programmable dead time, fault input, and break functionality - eliminates external gate driver protection logic.
VREFBUF	Programmable 2.048 V / 2.5 V / 2.9 V output with ±0.5% accuracy - provides stable reference for ADC/DAC without external voltage reference IC.
UCPD peripheral	Integrated USB Power Delivery controller supporting sink/source role negotiation and VBUS monitoring - enables single-chip USB-C adapter design.

Applications

Industrial Motor Control

Digital Power Supply

Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC blowers and robotic joints.

IC Role / Device Role / Timing Role: Primary controller executing FOC algorithm, generating 6-channel PWM with synchronized ADC sampling and hardware dead-time insertion.

Use Value: CORDIC and FMAC reduce CPU load by 45%, enabling 20 kHz PWM carrier frequency while maintaining 100 µs current loop update time.

Use Scenario: 65 W GaN-based USB-C PD charger with adaptive voltage/current regulation.

IC Role / Device Role / Timing Role: System manager handling AC-DC conversion control, USB-C PD communication via UCPD, and safety monitoring (OTP, overtemp, overvoltage).

Use Value: Integrated UCPD + FDCAN + 12-bit DACs eliminate 3 external ICs, shrinking BOM while supporting Programmable Power Supply (PPS) profile negotiation.

Smart Sensor Hub

Medical Portable Device

Use Scenario: Multi-sensor node aggregating temperature, pressure, and IMU data for predictive maintenance in factory equipment.

IC Role / Device Role / Timing Role: Data fusion processor with simultaneous ADC sampling across 12 channels, hardware oversampling, and secure BLE gateway interface.

Use Value: Dual 16-bit ADCs with 23-channel mux and 100 kSPS aggregate throughput enable synchronized acquisition of analog sensor arrays without external multiplexers.

Use Scenario: Battery-powered infusion pump requiring precise flow rate control and safety-critical watchdog supervision.

IC Role / Device Role / Timing Role: Safety-certified controller managing stepper motor drive, pressure sensing, battery management, and RTC-backed event logging.

Use Value: Independent/Window watchdogs, VBAT-backed RTC, and hardware parity on SRAM meet IEC 62304 Class C requirements for fail-safe operation and audit trail integrity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G431KBU3TR	32-pin QFN package (5 × 5 mm), 128 KB Flash, same core/peripherals but fewer GPIOs (26 vs. 38) and no UCPD.	Lacks USB-C PD capability and has reduced analog I/O count - suitable only for cost-sensitive, space-constrained motor control without USB-C interface.	Select when board area is critical and UCPD/FDCAN are not required; verify pin compatibility for existing layout reuse.
STM32G474RET6	64-pin LQFP, 512 KB Flash, 128 KB SRAM, additional crypto engine (AES-256, PKA), no UCPD but adds SAI and extra ADC/DAC channels.	Better suited for audio-enabled HMI or secure firmware updates; lacks USB-C PD negotiation but adds cryptographic acceleration for secure boot.	Choose for enhanced security or richer analog/audio I/O; avoid if USB-C PD compliance is mandatory and board redesign is constrained.

Compared with STM32G431KBU3TR, the STM32G431RBI3TR adds UCPD and 12 more GPIOs in a slightly larger 48-pin package; versus STM32G474RET6, it trades crypto/audio capability for USB-C PD integration and lower cost - making it optimal for compact, standards-compliant power adapters and motor drives.

Availability

STM32G431RBI3TR is available at Aetrix Electronics and suitable for industrial motor control, USB-C power delivery systems, and digital power conversion requiring stable component supply, long-term lifecycle assurance, and full production traceability.

Supply support for STM32G431RBI3TR 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, analog-rich embedded applications - specifically engineered for digital power, motor control, and USB-C PD systems where computational efficiency, precision analog integration, and functional safety coexist.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G431RBI3TR?

The STM32G431RBI3TR 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 fixed- and floating-point math for real-time control algorithms without external coprocessors.

Does the STM32G431RBI3TR support USB Type-C™ Power Delivery, and what hardware blocks enable it?

Yes - the STM32G431RBI3TR integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller compliant with USB PD 3.0. It features two CC (Configuration Channel) pins (PA13/PA14), VBUS sensing, and hardware state machines for role detection, policy engine execution, and BMC (Biphase Mark Coding) modulation - eliminating need for external PD controllers in compact adapter designs.

How many analog-to-digital converters does the STM32G431RBI3TR include, and what are their key resolution and speed specifications?

The device integrates two independent 12-bit ADCs, each capable of 0.25 µs conversion time (up to 4 MSPS), with up to 23 input channels total. Hardware oversampling supports effective resolutions up to 16-bit. Both ADCs feature programmable sampling time, injected/conversion modes, and synchronous triggering - essential for high-fidelity current/voltage measurement in motor and power applications.

What packaging and thermal characteristics define the STM32G431RBI3TR's suitability for high-density PCB layouts?

The STM32G431RBI3TR uses a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad, rated for industrial temperature range (–40 °C to +85 °C). Its θ_JA is 42 °C/W (JEDEC standard), enabling reliable operation at full 170 MHz in compact, fanless enclosures when properly heatsinked via the thermal pad to internal ground plane.

STM32G431RBI3TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 64-UFBGA

Series:: STM32G4

Packaging:: Tape & Reel (TR)

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:: 52

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:

STM32G431RBI3TR FAQ

1.How can I place an order for STM32G431RBI3TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G431RBI3TR 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 STM32G431RBI3TR reliable?

The price and inventory of STM32G431RBI3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431RBI3TR is usually 5 days.

3.What payment methods are accepted for STM32G431RBI3TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431RBI3TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G431RBI3TR?

STM32G431RBI3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G431RBI3TR 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 STM32G431RBI3TR?

For technical support, including STM32G431RBI3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431RBI3TR requirements.

6.How does Aetrix verify that STM32G431RBI3TR is sourced from the original manufacturer or authorized distributors?

All STM32G431RBI3TR 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 STM32G431RBI3TR meets industry standards.

7.What is the process for return or replacement of STM32G431RBI3TR?

All STM32G431RBI3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431RBI3TR, 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 STM32G431RBI3TR part is unused and in its original packaging.

Return procedure for STM32G431RBI3TR:

1.Submit a request within 90 days.

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

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