STMicroelectronics STM32G431CBU6

Overview

STM32G431CBU6 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), four rail-to-rail comparators, three operational amplifiers, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G431CBU6 datasheet, STM32G431CBU6 pinout, STM32G431CBU6 application, or STM32G431CBU6 equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support, USB Full-Speed + UCPD interface, low-power timer with sub-microsecond resolution, and hardware-accelerated trigonometric filtering for real-time control loops.

Technical Context

The STM32G431CBU6 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-to peripherals without bus contention.

Analog subsystem integration includes two independent 16-bit ADCs with hardware oversampling, four ultra-fast comparators with programmable hysteresis, and three op-amps configurable as programmable-gain amplifiers (PGA), all sharing a common VREFBUF (2.048 V / 2.5 V / 2.9 V) and supporting simultaneous sampling across multiple channels.

Key Specifications

Pinout & Package

STM32G431CBU6 uses the UFQFPN48 (7 × 7 mm) package with exposed thermal pad, optimized for compact motor-drive and power-supply control PCBs. Pin assignment follows ST's standardized UFQFPN48 layout with dedicated VDDA/VSSA rails, separate analog/digital ground domains, and 39 GPIOs (32 5V-tolerant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G431KBU6, the CBU6 offers full peripheral complement and FDCAN in the same 48-pin form factor; versus STM32G474RET6, it trades memory and security features for cost-sensitive, real-time deterministic control where cryptographic functions are not required.

Availability

STM32G431CBU6 is available at Aetrix Electronics and suitable for motor control, digital power conversion, industrial sensing, and USB-C PD sink applications requiring stable component supply across production lifecycles.

Supply support for STM32G431CBU6 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-efficiency digital power and precision motor control, integrating math accelerators, rich analog front-ends, and robust communication interfaces into a single-chip solution for real-time embedded systems.

FAQ

What is the maximum operating frequency and corresponding performance metric of the STM32G431CBU6?

The STM32G431CBU6 operates at up to 170 MHz with an Adaptive Real-Time (ART) accelerator enabling zero-wait-state Flash execution. Its performance is rated at 213 DMIPS (Dhrystone 2.1), verified under conditions of 1.71–3.6 V supply and ambient temperature –40°C to +85°C. This frequency is sustained across the full industrial temperature range with appropriate decoupling and thermal design.

Does the STM32G431CBU6 support hardware-based cryptographic operations?

No, the STM32G431CBU6 does not include dedicated cryptographic accelerators such as AES, SHA, or PKA engines. It relies on software libraries for encryption tasks. For hardware crypto support, ST recommends the STM32G474xx or STM32L5xx families, which integrate AES-128/256, SHA-256, and public-key accelerators alongside secure key storage.

How many analog-to-digital converter (ADC) channels does the STM32G431CBU6 support, and what is their resolution and speed?

The STM32G431CBU6 integrates two independent 16-bit ADCs (ADC1 and ADC2), supporting up to 23 external channels total. Each ADC achieves 0.25 µs conversion time (4 MSPS sampling rate) with hardware oversampling enabling effective resolution up to 16 bits. Both ADCs support simultaneous sampling, injected/conversion modes, and analog watchdogs for real-time signal integrity monitoring.

Is the STM32G431CBU6 pin-compatible with other members of the STM32G431x6/x8/xB family?

Yes, the STM32G431CBU6 in UFQFPN48 is pin-compatible with all other STM32G431xB variants in the same package (e.g., STM32G431RBT6 in LQFP64 is not pin-compatible). Pin compatibility extends across flash sizes (64/128/256 KB) and peripheral configurations within the UFQFPN48 footprint, allowing seamless migration between G431C6/G431C8/G431CB variants without PCB redesign.