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STMicroelectronics STM32G431RBI3

Name: STM32G431RBI3
Brand: STMicroelectronics
SKU: STM32G431RBI3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G431RBI3

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-UFBGA

Datasheet:: STM32G431RBI3.pdf

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

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Product details

Overview

STM32G431RBI3 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 STM32G431RBI3 datasheet, STM32G431RBI3 pinout, STM32G431RBI3 application, or STM32G431RBI3 equivalent, key selection considerations include its 48-pin UFQFPN package, FDCAN support for automotive-grade communication, hardware-accelerated trigonometric filtering, and VREFBUF with selectable 2.048 V / 2.5 V / 2.9 V outputs for precision analog subsystems.

Technical Context

The STM32G431RBI3 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 interconnect matrix routes 14 timers-including two 16-bit advanced motor-control timers with dead-time generation and emergency stop-alongside dual ADCs sharing up to 23 channels and synchronized sampling.

Analog subsystem integration includes three rail-to-rail op-amps configurable as programmable-gain amplifiers (PGA), four ultra-fast comparators with window mode, and a dedicated voltage reference buffer (VREFBUF) supporting three factory-trimmed output voltages. The FDCAN controller complies with ISO 11898-1:2015 for flexible data-rate operation up to 5 Mbps.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU and DSP instructions; enables real-time signal processing and floating-point control loops without external coprocessor.
Max Clock Frequency	170 MHz (213 DMIPS); sustained performance with ART Accelerator eliminates Flash wait states for deterministic timing-critical firmware.
Memory	128 KB Flash (ECC-protected, PCROP-secured), 22 KB SRAM + 10 KB CCM SRAM (parity-checked); supports secure boot and dual-bank firmware updates.
Analog Peripherals	Dual 16-bit ADCs (0.25 µs, 23-channel mux), 4× 12-bit DACs (2 buffered @ 1 MSPS, 2 unbuffered @ 15 MSPS), 3 op-amps (PGA-capable), 4 comparators.
Math Accelerators	CORDIC engine for sin/cos/tan/atan/sqrt/log/exp; FMAC for FIR/IIR filter coefficient computation - offloads CPU in motor control and power conversion.
Communication	FDCAN (ISO 11898-1:2015 compliant), 4× USART/UART (LIN/IrDA), 3× I²C (Fast Mode Plus), 3× SPI (I²S multiplexed), USB 2.0 FS, UCPD for USB Type-C PD.
Package & Pin Count	UFQFPN48 (7 × 7 mm, 0.5 mm pitch); 48-pin footprint optimized for compact motor drives and digital power modules with thermal pad for enhanced dissipation.

Pinout & Package

STM32G431RBI3 uses the UFQFPN48 (7 × 7 mm) package with exposed thermal pad, rated for industrial temperature range (–40 °C to +85 °C). Pin assignments follow ST's standardized LQFP48/UFQFPN48 mapping with dedicated VDDA/VSSA for analog domain isolation and multiple 5 V-tolerant GPIOs for direct interface with legacy logic.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Core power supply / ground	Dual 1.71–3.6 V domains: VDD powers digital logic; separate VDDA/VSSA required for ADC/DAC/OPAMP analog accuracy.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2	General-purpose I/O	Up to 42 GPIOs; most support external interrupts, timer channels, and 5 V tolerance - simplifies level-shifting in mixed-voltage systems.
PA1, PA2, PA3, PA4, PA5, PA6, PA7	ADC1_INx / ADC2_INx	Shared analog inputs for dual 16-bit ADCs; enable simultaneous sampling across up to 23 channels for current/voltage sensing in 3-phase inverters.
PA4, PA5	DAC1_OUT1 / DAC2_OUT1	Buffered 12-bit DAC outputs with 1 MSPS update rate; drive external op-amp stages for precise analog setpoint generation in closed-loop control.
PA8, PA11, PA12	MCO, USB_DM, USB_DP	USB 2.0 Full-Speed PHY interface with built-in transceivers; MCO provides clock output for trace/debug synchronization or external peripheral timing.
PD0, PD1	FDCAN1_RX, FDCAN1_TX	Dedicated differential CAN bus interface compliant with ISO 11898-1:2015; supports bit rates up to 5 Mbps for high-speed vehicle network nodes.

Key Features

Feature	Design Value
CORDIC accelerator	Hardware-computed trigonometric and hyperbolic functions reduce CPU load by >90% in field-oriented motor control (FOC) inner-loop calculations.
FMAC unit	Configurable 32-bit filter engine executing 16-tap FIR per cycle - enables real-time adaptive filtering for EMI suppression in digital power supplies.
VREFBUF output options	Factory-trimmed 2.048 V, 2.5 V, or 2.9 V references; eliminates need for external precision voltage sources in ADC/DAC calibration and sensor biasing.
Advanced motor timers (TIM1/TIM8)	8-channel PWM with programmable dead time, complementary outputs, and emergency stop input - directly drives 3-phase gate drivers without external logic.
FDCAN with flexible data-rate	Supports both classical CAN (1 Mbps) and CAN FD (up to 5 Mbps payload) on same physical layer; future-proofs automotive and industrial connectivity.

Applications

Industrial Motor Drive

Digital Power Supply

Use Scenario: 3-phase BLDC/PMSM inverter control in HVAC compressors and industrial pumps.

IC Role / Device Role / Timing Role: Real-time FOC execution via CORDIC/FMAC, synchronized ADC sampling of phase currents, and 8-channel PWM generation with <10 ns dead-time resolution.

Use Value: Enables sub-µs current loop closure and torque ripple reduction below 2% THD without external DSP.

Use Scenario: 1–3 kW isolated AC/DC or DC/DC converters with active PFC and LLC resonant stages.

IC Role / Device Role / Timing Role: Dual ADC oversampling for high-resolution voltage/current sensing; FDCAN for PMBus-style telemetry and fault reporting to master controller.

Use Value: Achieves <0.5% line/load regulation and real-time thermal derating using internal temperature sensor and VREFBUF-referenced ADC.

Smart Sensor Node

USB-C Power Delivery Hub

Use Scenario: Battery-powered condition-monitoring node with vibration, temperature, and acoustic emission sensing.

IC Role / Device Role / Timing Role: Low-power timer (LPTIM1) triggers periodic wake-up; SRAM retention in Stop mode preserves context; op-amps condition piezoelectric sensor signals.

Use Value: Extends battery life to >2 years on CR2032 while maintaining 1 kHz sampling fidelity via hardware oversampling.

Use Scenario: Multi-port USB-C docking station managing power negotiation, display alt-mode switching, and data tunneling.

IC Role / Device Role / Timing Role: UCPD controller handles USB PD 3.0 message exchange; SAI interfaces with audio codec; USB FS provides CDC ACM virtual COM port.

Use Value: Integrates PD policy engine, USB enumeration, and audio transport in single chip - eliminates discrete PD controller and USB bridge ICs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G431KBI3	LQFP32 package (32-pin), reduced GPIO count (25), no FDCAN, only one 12-bit DAC channel.	Suitable for cost-sensitive, space-constrained designs where CAN and dual DAC are unnecessary (e.g., basic sensor nodes).	Select when board layout area and BOM cost outweigh need for FDCAN and full analog feature set.
STM32G474RET6	LQFP64 package (64-pin), 512 KB Flash, 128 KB SRAM, additional peripherals: SAI, second FDCAN, more timers and ADC channels.	Targeted at complex HMI-enabled motor drives or multi-sensor fusion platforms requiring larger code footprint and expanded I/O.	Choose when scaling beyond 128 KB Flash or needing dual CAN buses, audio streaming, or higher-resolution timing capture.

Compared with STM32G431KBI3, the STM32G431RBI3 adds FDCAN, dual DACs, and 16 extra GPIOs in the same 7×7 mm footprint; versus STM32G474RET6, it trades memory and peripheral count for lower cost and smaller PCB area - ideal for volume production of mid-tier digital power and motor control.

Availability

STM32G431RBI3 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, smart sensor nodes, and USB-C PD hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32G431RBI3 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, cost-sensitive embedded applications demanding rich analog integration, math acceleration, and robust real-time control - specifically engineered for digital power conversion, motor control, and intelligent sensing.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32G431RBI3 achieves 170 MHz maximum CPU frequency using its Adaptive Real-Time (ART) Accelerator, which caches Flash read accesses to eliminate wait states. This allows deterministic zero-wait-state execution from internal Flash memory, verified under industrial temperature conditions (–40 °C to +85 °C) with 1.71–3.6 V supply.

Does STM32G431RBI3 support hardware encryption or secure boot?

No - the STM32G431RBI3 does not include a cryptographic processor (AES/RSA/SHA) or secure boot ROM. It offers proprietary code readout protection (PCROP) and securable memory areas for firmware IP protection, but lacks hardware-accelerated crypto engines found in G47x or H7-series variants.

Can the op-amps be used as instrumentation amplifiers?

Yes - all three op-amps support programmable-gain amplifier (PGA) mode with gain settings from 1 to 16, and their inputs/outputs are fully accessible via dedicated pins (e.g., OPAMP1_VINP = PA1, OPAMP1_VOUT = PA7). External resistors can configure them as 3-op-amp instrumentation amplifiers for high-common-mode rejection sensor conditioning.

What debug interfaces are supported and what are their pin requirements?

The STM32G431RBI3 supports Serial Wire Debug (SWD) using SWCLK (PA14) and SWDIO (PA13), requiring only two pins plus NRST for full debugging. JTAG is also available but consumes four additional pins (TMS, TCK, TDI, TDO). SWD is recommended for minimal pin count and compatibility with ST-LINK v2/v3 debug probes.

STM32G431RBI3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 64-UFBGA

Series:: STM32G4

Packaging:: Bulk

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:

STM32G431RBI3 FAQ

1.How can I place an order for STM32G431RBI3 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G431RBI3 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 STM32G431RBI3 reliable?

The price and inventory of STM32G431RBI3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431RBI3 is usually 5 days.

3.What payment methods are accepted for STM32G431RBI3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431RBI3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G431RBI3?

STM32G431RBI3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G431RBI3 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 STM32G431RBI3?

For technical support, including STM32G431RBI3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431RBI3 requirements.

6.How does Aetrix verify that STM32G431RBI3 is sourced from the original manufacturer or authorized distributors?

All STM32G431RBI3 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 STM32G431RBI3 meets industry standards.

7.What is the process for return or replacement of STM32G431RBI3?

All STM32G431RBI3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431RBI3, 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 STM32G431RBI3 part is unused and in its original packaging.

Return procedure for STM32G431RBI3:

1.Submit a request within 90 days.

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

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