STMicroelectronics STM32G474CBU6

Overview

STM32G474CBU6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 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 op-amps, and HRTIM with 184 ps resolution. It targets high-precision motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G474CBU6 datasheet, STM32G474CBU6 pinout, STM32G474CBU6 application, or STM32G474CBU6 equivalent, key selection considerations include HRTIM timing precision, dual-bank Flash read-while-write capability, CORDIC/FMAC hardware accelerators for real-time math, and FDCAN support for flexible data-rate automotive/industrial networks.

Technical Context

The device integrates an Adaptive Real-Time Accelerator (ART) enabling zero-wait-state execution from Flash memory, and includes a multi-AHB interconnect matrix supporting concurrent access to Flash, SRAM, and peripherals. Its clock system combines internal RC oscillators (16 MHz ±1%, 32 kHz ±5%), external crystal support (4–48 MHz), and multiple PLL configurations for precise peripheral clocking.

Analog subsystem integration includes rail-to-rail comparators, programmable-gain op-amps with full terminal access, and a voltage reference buffer (VREFBUF) offering selectable 2.048 V, 2.5 V, and 2.9 V outputs - all calibrated and supported by hardware oversampling in ADCs up to 16-bit effective resolution.

Key Specifications

Pinout & Package

STM32G474CBU6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact industrial and motor control PCB layouts with thermal pad for enhanced power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance mixed-signal MCU applications.

Compared with STM32G474RET6, the CBU6 offers identical peripheral sets in a space-constrained 7×7 mm package ideal for motor drive modules; versus STM32H743VIT6, it delivers superior analog integration and deterministic low-latency control at lower cost and power - making it optimal for cost-sensitive, size-constrained industrial edge nodes.

Availability

STM32G474CBU6 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and portable medical instrumentation requiring stable component supply across long production lifecycles.

Supply support for STM32G474CBU6 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 is engineered for high-precision analog-digital convergence in real-time control applications - emphasizing hardware math acceleration, ultra-fine PWM timing, and robust mixed-signal integration for next-generation power electronics and motion systems.

FAQ

What is the maximum operating temperature range for STM32G474CBU6?

The STM32G474CBU6 is qualified for industrial temperature range: –40 °C to +85 °C ambient, with junction temperature limited to +105 °C per datasheet Section 5.3.1. Thermal performance is validated with the UFQFPN48 package's exposed thermal pad soldered to PCB copper pour.

Does STM32G474CBU6 support secure boot and firmware encryption?

Yes - it includes proprietary code readout protection (PCROP), securable memory areas, and hardware cryptographic services via its RNG and CRC units. Secure boot implementation requires external trusted execution environment configuration; ST provides X-CUBE-SBSFU middleware for certified secure firmware updates.

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

Yes - HRTIM supports fully independent dead-time insertion (adjustable down to 184 ps steps) on each of its 12 PWM outputs, with emergency shutdown inputs and fault state preservation. This enables direct control of half-bridge and three-phase inverter gate drivers without external logic.

Is the internal 32 kHz RC oscillator accurate enough for RTC calendar functions?

No - the internal 32 kHz RC oscillator has ±5% accuracy and is unsuitable for RTC calendar. For timekeeping, the device requires either the 32.768 kHz external crystal (±20 ppm) or calibration against an external time source; the RTC auto-calibration feature supports fine-tuning using the HSE or LSE.