STMicroelectronics STM32G491CCU6

Overview

STM32G491CCU6 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 supports FDCAN, USB Full-Speed, UCPD, and advanced motor control timers - deployed in industrial motor drives and precision sensor fusion systems.

For engineers reviewing the STM32G491CCU6 datasheet, STM32G491CCU6 pinout, STM32G491CCU6 application, or STM32G491CCU6 equivalent, key selection considerations include its CORDIC/FMAC math accelerators, 5 V-tolerant I/Os, dual FDCAN interfaces with flexible data rate, and UFBGA64 package with 0.5 mm pitch for high-density PCB layouts.

Technical Context

The STM32G491CCU6 implements a tightly coupled Arm Cortex-M4 core with hardware FPU and Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its interconnect matrix routes 16 DMA channels across multiple AHB/APB buses, supporting concurrent analog acquisition (ADC oversampling), real-time control (advanced timers with dead-time), and communication (FDCAN/USB/UCPD).

Analog subsystem integration includes four OPAMPs configurable as programmable-gain amplifiers with all terminals accessible, dual buffered 1 MSPS DAC outputs, and internal VREFBUF delivering 2.048 V / 2.5 V / 2.9 V reference voltages - enabling self-contained signal conditioning without external components in closed-loop control applications.

Key Specifications

Pinout & Package

STM32G491CCU6 is housed in a 64-ball UFBGA package (5 × 5 mm, 0.5 mm pitch), optimized for thermal performance and board-level reliability in industrial environments. Pin mapping follows ST's standard STM32G4 series ballout with dedicated VSS/VDD pairs, analog supply isolation (VDDA/VSSA), and dedicated debug (SWDIO/SWCLK) and reset (NRST) terminals.

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 STM32G491CCU6 adds critical USB-C PD and dual-FDCAN capabilities for next-gen power adapters and vehicle ECUs; versus STM32H743VIT6, it delivers superior analog signal chain integration and lower system-level power consumption in compact form factors.

Availability

STM32G491CCU6 is available at Aetrix Electronics and suitable for industrial motor drives, smart energy metering, USB-C power adapters, and portable medical sensor hubs requiring stable component supply across extended product lifecycles.

Supply support for STM32G491CCU6 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-efficiency digital power conversion and precision analog control applications, combining Arm Cortex-M4 performance with hardware math accelerators and robust industrial-grade peripherals.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the STM32G491CCU6?

The STM32G491CCU6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS, measured using the Dhrystone 2.1 benchmark with ART Accelerator enabled and zero-wait-state Flash execution. This frequency is sustained across the full industrial temperature range (–40°C to +85°C) under specified VDD conditions (1.71–3.6 V).

Does the STM32G491CCU6 support hardware cryptographic acceleration?

No, the STM32G491CCU6 does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption; however, its true random number generator (RNG) and 96-bit unique ID provide foundational security primitives for key derivation and device authentication in constrained environments.

How many analog-to-digital converters does the STM32G491CCU6 integrate, and what are their key resolution and speed specifications?

The STM32G491CCU6 integrates three independent 16-bit ADCs with 0.25 µs conversion time per sample, supporting up to 36 input channels via multiplexing. Each ADC features hardware oversampling (up to 8×) to achieve effective resolution beyond 16 bits, and operates across the full 0–3.6 V input range with internal calibration for ±1 LSB INL error.

What development tools and debug interfaces are supported by the STM32G491CCU6?

The STM32G491CCU6 supports Serial Wire Debug (SWD) and JTAG interfaces via dedicated pins (PA13/PA14), enabling full-featured debugging with ST-LINK/V2-1, SEGGER J-Link, and other CMSIS-DAP-compliant probes. It also includes Embedded Trace Macrocell (ETM) for real-time instruction tracing and SWV (Serial Wire Viewer) for printf-style debugging without halting program execution.