STMicroelectronics STM32G473CBT3

Overview

STM32G473CBT3 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, 512 KB Flash (ECC-enabled), 128 KB SRAM (96 KB + 32 KB CCM), and operating frequency up to 170 MHz (213 DMIPS). It integrates dual-bank read-while-write Flash, CORDIC/FMAC math accelerators, seven 12-bit DAC channels, five 12-bit ADCs (up to 42 channels), and three FDCAN controllers - deployed in industrial motor control systems requiring real-time analog signal processing and deterministic communication.

For engineers reviewing the STM32G473CBT3 datasheet, STM32G473CBT3 pinout, STM32G473CBT3 application, or STM32G473CBT3 equivalent, key selection criteria include its 48-pin UFQFPN package, 170 MHz real-time performance with ART Accelerator, integrated voltage reference buffer (2.048 V/2.5 V/2.9 V), hardware parity on critical SRAM blocks, and support for USB Type-C™ power delivery via UCPD peripheral.

Technical Context

The STM32G473CBT3 implements an 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 dual-bank Flash with PCROP and securable OTP, plus 96 KB main SRAM with hardware parity on first 32 KB and 32 KB CCM-SRAM with parity - optimized for safety-critical firmware and real-time data buffering.

Analog integration features seven 12-bit DACs (3 buffered external @ 1 MSPS, 4 unbuffered internal @ 15 MSPS), five 12-bit ADCs with hardware oversampling up to 16-bit resolution, six rail-to-rail op-amps configurable as PGAs, and dedicated CORDIC/FMAC accelerators for trigonometric and filter computations - targeting closed-loop motor control and sensor fusion applications.

Key Specifications

Pinout & Package

STM32G473CBT3 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), qualified for industrial temperature range (–40 °C to +85 °C), with exposed thermal pad for enhanced thermal dissipation in compact motor drive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G473CBT3, STM32G474CBT3 adds security peripherals without sacrificing performance or analog capability, while STM32F303CBT6 trades significant compute, analog, and communication capability for lower BOM cost - making it unsuitable for applications requiring real-time math acceleration or FDCAN-based diagnostics.

Availability

STM32G473CBT3 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, PLC I/O modules, and USB-C power delivery sink designs requiring stable component supply across multi-year production cycles.

Supply support for STM32G473CBT3 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 management ICs, sensors, and automotive-grade components since 1987.

The STM32G4 series targets high-performance, analog-rich embedded applications - especially industrial automation, digital power conversion, and USB-C ecosystem devices - combining real-time determinism with integrated math and communication accelerators.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G473CBT3?

The STM32G473CBT3 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone MIPS), validated using the ARM Dhrystone benchmark under conditions of zero-wait-state Flash execution enabled by the ART Accelerator. This frequency is sustained across the full industrial temperature range (–40 °C to +85 °C) with VDD ≥ 2.7 V.

Does the STM32G473CBT3 support hardware-accelerated cryptographic operations?

No, the STM32G473CBT3 does not include dedicated cryptographic accelerators such as AES, HASH, or PKA. Cryptographic functions must be implemented in software or via external co-processors. For hardware crypto support, ST recommends the STM32G474CBT3 variant, which adds AES-256, HASH, and RSA engines while maintaining pin compatibility and identical analog/peripheral features.

How many ADC and DAC channels does the STM32G473CBT3 provide, and what are their key specifications?

The STM32G473CBT3 integrates five independent 12-bit ADCs with up to 42 total input channels, 0.25 µs conversion time, and hardware oversampling enabling up to 16-bit effective resolution. It also provides seven 12-bit DAC channels: three buffered external outputs rated at 1 MSPS, and four unbuffered internal outputs rated at 15 MSPS - all supported by dedicated voltage reference buffer (VREFBUF) with selectable 2.048 V, 2.5 V, or 2.9 V outputs.

Is the STM32G473CBT3 pin-compatible with other members of the STM32G473 family?

Yes, the STM32G473CBT3 in UFQFPN48 is pin-compatible with all other STM32G473x variants offered in the same 48-pin package (e.g., STM32G473RBT3, STM32G473VBT3), sharing identical pin definitions, electrical characteristics, and peripheral mappings. Differences are limited to Flash size (512 KB vs 256 KB or 128 KB) and SRAM configuration - allowing seamless migration within the same footprint during design optimization or cost scaling.