STMicroelectronics STM32G491CCU3

Overview

STM32G491CCU3 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, 112 KB SRAM (96 KB + 16 KB CCM), and integrated analog peripherals including three 16-bit ADCs, four 12-bit DACs, four rail-to-rail comparators, and four operational amplifiers. It targets motor control, digital power conversion, and industrial sensing systems requiring high-precision analog signal processing and real-time computation.

For engineers reviewing the STM32G491CCU3 datasheet, STM32G491CCU3 pinout, STM32G491CCU3 application, or STM32G491CCU3 equivalent, key selection criteria include its CORDIC/FMAC math accelerators, dual FDCAN 2.0B/FD interfaces, UCPD controller for USB Type-C™ PD, 5 V-tolerant GPIOs, and support for multiple low-power modes (Stop 0/1, Standby, Shutdown) with RTC and VBAT backup.

Technical Context

The STM32G491CCU3 implements a tightly coupled Arm Cortex-M4 core with FPU and MPU, augmented by the Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its interconnect matrix supports concurrent access to Flash, SRAM, and peripherals via multi-AHB buses.

Analog subsystem integration includes three independent 16-bit ADCs (0.25 µs conversion, hardware oversampling), four 12-bit DACs (2 buffered external @ 1 MSPS, 2 unbuffered internal @ 15 MSPS), four op-amps configurable in PGA mode with full terminal access, and a programmable voltage reference buffer (2.048 V / 2.5 V / 2.9 V).

Key Specifications

Pinout & Package

STM32G491CCU3 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2-certified. Pin layout supports full peripheral remapping via alternate function registers and includes 38 general-purpose I/Os - 26 of which are 5 V tolerant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G474RET6, the STM32G491CCU3 adds USB-C PD and second FDCAN at identical Flash/SRAM size, making it superior for next-gen power adapters and automotive body electronics. Versus STM32H743VIT6, it delivers better analog-per-mm² density and deterministic low-latency math acceleration - critical for closed-loop digital power and motor control.

Availability

STM32G491CCU3 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, programmable logic controllers, and medical sensor hubs requiring stable component supply, long-term manufacturability, and qualified automotive-grade alternatives.

Supply support for STM32G491CCU3 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 products for industrial, automotive, and consumer markets.

The STM32G4 series targets high-efficiency digital power conversion and precision motor control, integrating math accelerators (CORDIC/FMAC), rich analog peripherals, and USB-C PD into a single Cortex-M4 platform optimized for real-time deterministic performance.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G491CCU3?

The STM32G491CCU3 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone MIPS), achieved using the ART Accelerator for zero-wait-state Flash execution. Its FPU supports single-precision floating-point operations compliant with IEEE 754, and the MPU enforces memory protection for secure multitasking environments.

Does the STM32G491CCU3 support USB Type-C™ Power Delivery, and how is it implemented?

Yes - the STM32G491CCU3 integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller with physical layer (PHY), protocol engine, and VCONN switch control. It supports PD 3.0 negotiation, source/sink roles, and vendor-defined messages without requiring external PD controllers or level shifters.

How many analog-to-digital converters does the STM32G491CCU3 have, and what are their key resolution and speed specifications?

The device integrates three independent 16-bit ADCs, each capable of 0.25 µs conversion time (up to 4 MSPS), with hardware oversampling support up to 16× for enhanced effective resolution. All ADCs share a common 0–3.6 V input range and support up to 36 external channels via multiplexing across GPIOs.

What low-power modes are supported, and what is the typical current draw in Stop 0 mode?

The STM32G491CCU3 supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped except LSE/LSI, SRAM and registers retained), typical current consumption is 2.3 µA at 25 °C with RTC running - verified per DS13122 Rev 4 Table 29, enabling battery-backed operation for extended periods.