STMicroelectronics STM32G491CCU3TR

Overview

STM32G491CCU3TR 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 high-precision motor control, digital power conversion, and industrial sensing systems requiring real-time math acceleration via CORDIC and FMAC.

For engineers reviewing the STM32G491CCU3TR datasheet, STM32G491CCU3TR pinout, STM32G491CCU3TR application, or STM32G491CCU3TR equivalent, key selection criteria include its 48-pin UFQFPN package, dual FDCAN support for automotive-grade communication, hardware-accelerated trigonometric and filtering functions, and 5 V-tolerant I/Os enabling direct interface with legacy logic.

Technical Context

The STM32G491CCU3TR implements an Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz, paired with a Memory Protection Unit (MPU) for secure task isolation. Its interconnect matrix routes 16 DMA channels across multiple AHB/APB buses, supporting concurrent high-bandwidth transfers for ADC sampling, DAC streaming, and USB full-speed data movement.

It integrates two FDCAN controllers compliant with ISO 11898-1:2015 (CAN FD), supporting flexible data-rate up to 5 Mbit/s, alongside a dedicated UCPD peripheral for USB Type-C™ power delivery negotiation - both operating independently of the main CPU core via dedicated clock domains and message RAM.

Key Specifications

Pinout & Package

STM32G491CCU3TR uses the UFQFPN48 (7 × 7 mm) package with 48 terminals, designed for high-density PCB layouts and thermal efficiency in fanless industrial enclosures. Pin mapping follows ST's standard LQFP48-compatible signal assignment, with VDD/VSS pairs distributed for low-noise analog supply decoupling.

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 STM32G491CCU3TR trades pin count and SRAM for integrated USB-C PD and dual FDCAN - ideal for compact, standards-compliant power adapters and automotive gateway modules. Against STM32H743VIT6, it delivers superior analog subsystem integration and deterministic real-time math at lower power and cost, despite lower peak CPU throughput.

Availability

STM32G491CCU3TR is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, USB-C PD source design, and programmable logic controller I/O modules requiring stable component supply across multi-year production cycles.

Supply support for STM32G491CCU3TR 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-efficiency digital power and precision motor control applications, integrating specialized math accelerators (CORDIC/FMAC), robust analog front-ends, and USB-C PD controllers to replace discrete MCU + ASSP combinations in compact power electronics.

FAQ

What is the maximum operating temperature range for STM32G491CCU3TR?

The STM32G491CCU3TR is rated for industrial temperature operation from –40 °C to +85 °C, validated per ST's ECOPACK2 qualification standards. Thermal resistance (θ_JA) is 41.5 °C/W in the UFQFPN48 package, enabling reliable operation in sealed enclosures without forced airflow when power dissipation remains below 350 mW.

Does STM32G491CCU3TR support hardware encryption for secure firmware updates?

Yes - it includes a True Random Number Generator (RNG), CRC calculation unit, and supports secure boot via proprietary code readout protection (PCROP) and securable memory areas. While it lacks a dedicated cryptographic accelerator (e.g., AES engine), PCROP and write-protection registers enable tamper-resistant bootloader validation and encrypted image decryption in software.

Can the CORDIC unit perform inverse trigonometric functions like arcsin or arctan?

Yes - the CORDIC engine natively computes arcsin, arccos, arctan, log, exp, and sqrt in rotation and vectoring modes. For example, arctan(y/x) is executed in <80 cycles with 16-bit input precision, making it suitable for real-time rotor position estimation in sensorless motor control without lookup tables or floating-point libraries.

Is the UFQFPN48 package of STM32G491CCU3TR compatible with reflow soldering per J-STD-020?

Yes - the UFQFPN48 package (A0B9 variant) is qualified for standard lead-free reflow per J-STD-020D. Peak reflow temperature is 260 °C for ≤30 seconds, with ramp-up rate ≤3 °C/s and cooling rate ≤6 °C/s. ST provides detailed footprint and stencil recommendations in Application Note AN5053 to prevent solder bridging on 0.5 mm pitch leads.