STMicroelectronics STM32G473CBU6

Overview

STM32G473CBU6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU and ART Accelerator, delivering 213 DMIPS at 170 MHz. It integrates 512 KB Flash with ECC, 128 KB SRAM (96 KB + 32 KB CCM), dual-bank read-while-write capability, and hardware math accelerators (CORDIC, FMAC). Designed for real-time motor control and analog-intensive embedded systems, it supports FDCAN, USB FS, UCPD, and advanced timer subsystems with dead-time generation.

For engineers reviewing the STM32G473CBU6 datasheet, STM32G473CBU6 pinout, STM32G473CBU6 application, or STM32G473CBU6 equivalent, key selection criteria include its 48-pin UFQFPN package, 170 MHz CPU frequency with deterministic zero-wait-state Flash execution, integrated analog front-end (5× ADCs, 7× DACs, 6× op-amps, 7× comparators), and support for high-precision timing in industrial drives and digital power conversion.

Technical Context

The STM32G473CBU6 implements an Arm Cortex-M4 core with FPU and Memory Protection Unit (MPU), enabling deterministic real-time operation and secure partitioning of code/data. Its Adaptive Real-Time (ART) Accelerator eliminates Flash wait states across full voltage (1.71–3.6 V) and temperature ranges, while the CORDIC and FMAC units offload trigonometric and filtering computations from the CPU.

It features a multi-AHB bus matrix interconnect supporting concurrent access to Flash, SRAM, peripherals, and DMA channels. The peripheral set includes three FDCAN controllers (flexible data-rate), USB 2.0 full-speed with LPM/BCD, and a dedicated UCPD interface for USB Type-C™ power delivery negotiation - all synchronized via a flexible clock tree with four oscillators (HSE, LSE, HSI, LSI) and multiple PLL configurations.

Key Specifications

Pinout & Package

STM32G473CBU6 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package with exposed thermal pad, optimized for thermal performance and board-level reliability in industrial environments. Pin count and layout conform to ST's standardized UFQFPN48 footprint (package code A0B9).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G431CBU6, the STM32G473CBU6 adds dual-bank Flash, CORDIC/FMAC, and enhanced analog integration - critical for next-generation digital power and motor control. Versus STM32F303CCT6, it delivers 2.4× higher DMIPS, FDCAN, UCPD, and modern low-power modes - enabling new functionality without compromising footprint or thermal design.

Availability

STM32G473CBU6 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, medical diagnostic equipment, and smart industrial sensors requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for STM32G473CBU6 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, MEMS, and automotive ICs.

The STM32G4 series targets high-performance, analog-rich embedded applications - particularly digital power conversion, motor control, and industrial automation - with hardware math acceleration and functional safety readiness (IEC 61508 SIL2, UL 1998).

FAQ

What is the maximum operating frequency and corresponding performance metric of the STM32G473CBU6?

The STM32G473CBU6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1). This is achieved with zero-wait-state execution from Flash memory thanks to the Adaptive Real-Time (ART) Accelerator, which includes a 4-line instruction cache and prefetch buffer. The FPU supports single-precision floating-point operations essential for motor control and signal processing workloads.

Does the STM32G473CBU6 support USB Type-C™ Power Delivery, and how is it implemented?

Yes, the STM32G473CBU6 integrates a dedicated USB Type-C™ / USB Power Delivery (UCPD) controller compliant with USB PD 3.0. It features two CC line interfaces with BMC encoding/decoding, VCONN switching, and hardware PD message parsing - eliminating the need for an external PD controller. The UCPD peripheral operates independently of the USB FS interface and supports sink/source role negotiation, voltage/current contract management, and fast role swap.

How does the dual-bank Flash architecture benefit firmware updates in safety-critical applications?

The 512 KB Flash is split into two independent banks (Bank 1 and Bank 2), enabling true Read-While-Write (RWW) operation. During firmware update, one bank executes application code while the other is erased and reprogrammed - ensuring continuous real-time operation without interruption. This architecture supports atomic firmware swaps and rollback mechanisms required by IEC 61508 and ISO 13849 for functional safety compliance.

What analog peripherals are included, and how do they support high-precision signal acquisition?

The device integrates five 12-bit ADCs (each up to 42 channels, 0.25 µs conversion time), seven 12-bit DACs (three buffered external outputs at 1 MSPS), six rail-to-rail op-amps (configurable as PGAs), seven ultra-fast comparators, and a programmable voltage reference buffer (VREFBUF). These peripherals enable simultaneous multi-sensor acquisition, precise actuator control, and hardware-based signal conditioning - all synchronized via shared trigger sources and DMA for deterministic timing.