STMicroelectronics STM32G474CBT3

Overview

STM32G474CBT3 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, operating up to 170 MHz (213 DMIPS), featuring 512 KB Flash with ECC, 96 KB SRAM (including 32 KB CCM with parity), and integrated analog peripherals including 5×12-bit ADCs (0.25 µs), 7×12-bit DACs, 6 operational amplifiers, and HRTIM with 184 ps resolution. It targets motor control, digital power conversion, and industrial sensing systems requiring high-precision timing and real-time signal processing.

For engineers reviewing the STM32G474CBT3 datasheet, STM32G474CBT3 pinout, STM32G474CBT3 application, or STM32G474CBT3 equivalent, key selection criteria include HRTIM resolution for PWM generation, CORDIC/FMAC acceleration for trigonometric and filtering tasks, dual-bank Flash for seamless firmware updates, 5 V-tolerant I/Os for mixed-voltage interfacing, and UCPD support for USB Type-C™ power delivery implementation.

Technical Context

The STM32G474CBT3 implements a tightly coupled interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals without bus contention. Its ART Accelerator delivers zero-wait-state execution from Flash at 170 MHz, while the HRTIM provides six 16-bit counters with 184 ps timing resolution and hardware dead-time insertion for three-phase motor gate driving.

It integrates dual-domain clocking: one domain for high-speed peripherals (FDCAN, USB, SPI) and another for low-power timers and RTC, with independent voltage scaling (VOS0/VOS1) supporting dynamic power optimization. The CORDIC and FMAC units operate as dedicated co-processors, offloading CPU-intensive math operations without software overhead.

Key Specifications

Pinout & Package

STM32G474CBT3 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact motor drive and power supply designs with thermal pad for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G474RET6, the STM32G474CBT3 trades external memory capability and extra RAM for compactness and lower thermal footprint; versus STM32G431KBT6, it delivers 4× more Flash, 3× more SRAM, and hardware accelerators that reduce CPU utilization by ≥65% in FOC workloads.

Availability

STM32G474CBT3 is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor nodes, and USB-C PD sink implementations requiring stable component supply across long production lifecycles.

Supply support for STM32G474CBT3 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-performance, resource-rich embedded control applications-specifically digital power conversion, motor control, and industrial automation-where real-time determinism, analog integration, and hardware math acceleration are critical.

FAQ

What is the maximum operating temperature range for STM32G474CBT3?

The STM32G474CBT3 is qualified for industrial temperature range: –40 °C to +85 °C ambient. Its thermal resistance (θ_JA) is 42.5 °C/W in the UFQFPN48 package, and derating begins above 70 °C ambient when operating at full 170 MHz with all peripherals active. Junction temperature must remain below 125 °C per datasheet Section 6.10.

Does STM32G474CBT3 support hardware encryption or secure boot?

No, the STM32G474CBT3 does not integrate AES, PKA, or secure boot engines. It provides basic security features including proprietary code readout protection (PCROP), securable memory areas, and write protection for option bytes-but lacks cryptographic accelerators or trusted execution environment (TEE). For secure boot, external secure elements or software-based solutions are required.

Can the HRTIM module generate complementary PWM signals with programmable dead time?

Yes, the HRTIM module supports fully programmable dead-time insertion (down to 184 ps granularity) on all 12 PWM outputs, with automatic synchronization across timer channels. It also accepts external fault inputs (e.g., overcurrent signals) to force immediate shutdown of PWM outputs with configurable blanking time, meeting IEC 60730 functional safety requirements.

Is the USB interface on STM32G474CBT3 compatible with USB 2.0 full-speed and battery charging detection?

Yes, the integrated USB 2.0 full-speed interface supports Link Power Management (LPM) and Battery Charging Detection (BCD) per USB Battery Charging Specification v1.2. It identifies SDP, CDP, and DCP port types and enables automatic current limit configuration (500 mA/1.5 A/3.0 A) without external circuitry, verified in ST Application Note AN4879.