STMicroelectronics STM32G431RBI6

Overview

STM32G431RBI6 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), three rail-to-rail op-amps, and FDCAN for industrial motor control and power conversion systems.

For engineers reviewing the STM32G431RBI6 datasheet, STM32G431RBI6 pinout, STM32G431RBI6 application, or STM32G431RBI6 equivalent, key selection factors include its 48-pin UFQFPN package, 5 V-tolerant GPIOs, hardware math accelerators (CORDIC/FMAC), USB Type-C™/UCPD controller, and support for real-time motor control via two 16-bit advanced timers with dead-time generation and emergency stop.

Technical Context

The STM32G431RBI6 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 ECC and PCROP, 22 KB SRAM with parity on first 16 KB, and 10 KB CCM SRAM with parity-optimized for deterministic real-time code/data access.

Analog integration centers on dual independent 12-bit DACs (2 buffered external, 2 unbuffered internal), dual 16-bit ADCs with hardware oversampling and 23-channel multiplexing, three fully accessible op-amps configurable as PGAs, and four ultra-fast rail-to-rail comparators-enabling closed-loop analog signal conditioning without external components.

Key Specifications

Pinout & Package

STM32G431RBI6 uses a 48-pin UFQFPN (7 × 7 mm) package with 0.5 mm pitch, optimized for compact industrial and power electronics layouts. Pin functions are validated per ST's DS12589 Rev 6, Section 4.3 (UFQFPN48 pinout description).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G431KBI6, the STM32G431RBI6 adds FDCAN and 17 extra GPIOs for multi-sensor systems; versus STM32G474RET6, it trades memory and crypto for lower cost and smaller footprint-ideal for cost-optimized motor control where security and audio are not required.

Availability

STM32G431RBI6 is available at Aetrix Electronics and suitable for industrial motor drives, smart power supplies, programmable logic controllers, and medical sensor interfaces requiring stable component supply across long-lifecycle production programs.

Supply support for STM32G431RBI6 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, and MEMS technologies for industrial, automotive, and consumer markets.

The STM32G4 series targets high-performance, cost-sensitive real-time control applications-specifically engineered for digital power conversion, motor control, and analog-intensive embedded systems with hardware math acceleration.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G431RBI6?

The STM32G431RBI6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone MIPS). 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) compliance with IEEE-754 standard.

Does the STM32G431RBI6 support hardware-accelerated mathematical functions, and if so, which ones?

Yes-it integrates two dedicated hardware accelerators: the CORDIC unit for trigonometric, hyperbolic, and logarithmic functions (e.g., sin/cos/atan), and the FMAC (Filter Mathematical Accelerator) for real-time FIR/IIR filtering. Both operate independently of the CPU core and are accessible via memory-mapped registers with DMA support.

What analog peripherals are integrated, and how do they support precision signal acquisition?

The device integrates dual 16-bit ADCs (0.25 µs conversion, hardware oversampling up to 18-bit ENOB), four rail-to-rail comparators, three fully accessible op-amps (configurable as PGAs), and a programmable VREFBUF (2.048/2.5/2.9 V). These enable end-to-end analog signal chains-including sensor biasing, amplification, comparison, and digitization-without external components.

Which communication interfaces support industrial fieldbus and USB-C power delivery functionality?

The STM32G431RBI6 includes one FDCAN controller compliant with ISO 11898-1:2015 for flexible data-rate automotive and industrial networks, plus a dedicated USB Type-C™/Power Delivery (UCPD) controller supporting USB PD 3.0, role swapping, and VBUS monitoring-fully implemented in hardware without firmware overhead.