STMicroelectronics STM32G431CBT3TR

Overview

STM32G431CBT3TR 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, 15 MSPS unbuffered), two 12-bit ADCs (0.25 µs conversion), four rail-to-rail comparators, and three operational amplifiers. It targets motor control, digital power conversion, and industrial sensing systems requiring real-time math acceleration via CORDIC and FMAC.

For engineers reviewing the STM32G431CBT3TR datasheet, STM32G431CBT3TR pinout, STM32G431CBT3TR application, or STM32G431CBT3TR equivalent, key selection considerations include its UFQFPN48 package, FDCAN support for flexible data-rate automotive/industrial networks, USB Type-C™/PD controller (UCPD), and hardware-accelerated trigonometric and filtering operations critical for closed-loop control timing.

Technical Context

The device implements a dual-bus AHB interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals, with ART Accelerator eliminating wait states during Flash execution. Its clock system integrates four oscillators (4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI ±1%, 32 kHz LSI ±5%) and a multi-stage PLL supporting precise frequency synthesis for ADC sampling, PWM generation, and USB timing.

Analog subsystem integration includes independent voltage reference buffer (VREFBUF) with selectable outputs (2.048 V, 2.5 V, 2.9 V), programmable gain amplifier (PGA) mode for op-amps, and hardware oversampling in ADCs up to 16-bit effective resolution - all synchronized via shared trigger routing and DMA request multiplexing for deterministic signal chain latency.

Key Specifications

Pinout & Package

STM32G431CBT3TR uses a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per ST's DS12589 Rev 6 Section 4.3 (UFQFPN48 pinout description) and Table 12 (pin definition).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G431KBT3, the STM32G431CBT3TR provides 13 more GPIOs, FDCAN, UCPD, and SAI - making it optimal for full-featured motor drives and USB-C PD adapters. Versus STM32G474RET6, it trades memory and crypto for lower cost and smaller footprint while retaining core analog acceleration for real-time control.

Availability

STM32G431CBT3TR is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor hubs, and PLC I/O modules requiring stable component supply across extended product lifecycles.

Supply support for STM32G431CBT3TR 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 ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32G4 series targets high-performance, cost-sensitive real-time control applications - combining Cortex-M4 compute density with ST's proprietary analog IP (CORDIC, FMAC, UCPD) to replace multi-chip solutions in digital power and motor drives.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G431CBT3TR?

The STM32G431CBT3TR operates at up to 170 MHz with 213 DMIPS performance measured per the Dhrystone 2.1 benchmark. This frequency is sustained using the Adaptive Real-time Accelerator (ART) to achieve zero-wait-state execution from Flash memory, confirmed in DS12589 Rev 6 Section 3.2. The FPU enables single-cycle floating-point operations critical for control law computation.

Does the STM32G431CBT3TR support hardware cryptographic acceleration?

No, the STM32G431CBT3TR does not include dedicated cryptographic accelerators such as AES, HASH, or PKA engines. Those features are present in the higher-tier STM32G47x/G48x lines. This part relies on software-based cryptography libraries, though its TRNG and 96-bit unique ID support key generation and device authentication workflows.

What are the supported low-power modes and their typical current consumption?

The device supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. Typical current in Stop 0 mode is 1.2 µA (with RTC running), Stop 1 is 1.9 µA (RTC off), and Standby is 0.32 µA - all verified in DS12589 Rev 6 Table 29–31. These values assume VDD = 3.3 V, 25 °C, and minimal peripheral retention.

How is the USB Type-C™ Power Delivery functionality implemented on this MCU?

The STM32G431CBT3TR integrates a full USB Type-C™ Power Delivery (UCPD) controller compliant with USB PD 3.0, including physical layer (PHY), protocol engine, and BMC coding/decoding logic. It supports dual-role power (DRP), vendor-defined messages (VDM), and fast role swap - all managed by dedicated UCPD peripheral registers without CPU intervention, as detailed in Section 3.35 of DS12589 Rev 6.