STMicroelectronics STM32G474RBT6

Overview

STM32G474RBT6 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 hardware accelerators (CORDIC, FMAC). It delivers 184 ps high-resolution PWM via HRTIM and supports FDCAN, USB FS, and UCPD for industrial motor control and power delivery systems.

For engineers reviewing the STM32G474RBT6 datasheet, STM32G474RBT6 pinout, STM32G474RBT6 application, or STM32G474RBT6 equivalent, key selection criteria include HRTIM timing precision, dual-bank Flash read-while-write capability, 5 V-tolerant GPIOs, and integrated analog subsystem (7×12-bit DACs, 5×ADCs with 16-bit oversampling).

Technical Context

The device implements an Adaptive Real-time Accelerator (ART) enabling zero-wait-state execution from Flash memory, and integrates a multi-AHB interconnect matrix for concurrent peripheral access. Its HRTIM block provides six 16-bit counters with 184 ps resolution and advanced dead-time generation for complex waveform synthesis in motor drives.

It features three FDCAN controllers supporting flexible data-rate (CAN FD), a USB 2.0 full-speed interface with LPM/BCD, and a dedicated USB Type-C™/Power Delivery controller (UCPD) with CC line monitoring - all co-located on a single die with deterministic latency paths.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin layout optimized for mixed-signal routing, including dedicated analog supply pins (VDDA/VSSA), separate VREF+ and VREF–, and multiple VDD/VSS pairs for noise isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G473RBT6, the G474RBT6 adds essential USB-C PD control and retains identical motor control capabilities; versus STM32H743VIT6, it trades peak performance for deterministic ultra-high-resolution timing and integrated power delivery management - making it uniquely suited for compact, cost-sensitive, timing-critical embedded power systems.

Availability

STM32G474RBT6 is available at Aetrix Electronics and suitable for industrial motor drives, USB-C power delivery systems, programmable logic controllers, and high-precision sensor signal conditioning requiring stable component supply across extended production lifecycles.

Supply support for STM32G474RBT6 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 components for industrial, automotive, and consumer markets.

The STM32G4 series targets high-efficiency digital power conversion and real-time motor control, integrating specialized peripherals like HRTIM, CORDIC, FMAC, and UCPD to reduce system-level complexity in power electronics applications.

FAQ

What is the maximum operating frequency and associated DMIPS rating?

The STM32G474RBT6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS, measured using the Dhrystone 2.1 benchmark. This performance is sustained with zero-wait-state execution from Flash memory thanks to the ART Accelerator, and includes full DSP instruction support and floating-point unit acceleration.

Does this MCU support USB Type-C Power Delivery negotiation?

Yes - the STM32G474RBT6 integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller compliant with USB PD 3.0. It handles CC line monitoring, VCONN switching, BMC physical layer encoding/decoding, and PD message parsing without external PHY, enabling fully autonomous port control in sink/source/DRP configurations.

How many analog-to-digital converters does it include, and what are their key capabilities?

The device includes five independent 12-bit ADCs supporting up to 42 channels total, with conversion times as fast as 0.25 µs. Each ADC supports hardware oversampling up to 16-bit effective resolution, programmable sampling time, and synchronization triggers from HRTIM or other timers - enabling precise, time-aligned acquisition in motor control loops.

What packaging options are available, and which one corresponds to the STM32G474RBT6 part number?

The STM32G474RBT6 specifically uses the LQFP64 package (10 × 10 mm body, 0.5 mm pitch, exposed thermal pad). Other variants in the G474 family offer UFQFPN48, LQFP48, TFBGA100, and WLCSP81 packages - but only the 'R' prefix with 'T6' suffix denotes the LQFP64 configuration per ST's ordering code convention.