STMicroelectronics STM32G491MCT3

Overview

STM32G491MCT3 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 real-time math acceleration via CORDIC and FMAC.

For engineers reviewing the STM32G491MCT3 datasheet, STM32G491MCT3 pinout, STM32G491MCT3 application, or STM32G491MCT3 equivalent, key selection considerations include its dual FDCAN support for automotive-grade communication, UCPD interface for USB Type-C™ power delivery, and 5 V-tolerant GPIOs enabling direct interfacing with legacy logic in industrial HMI and power supply designs.

Technical Context

The STM32G491MCT3 implements a tightly coupled Arm Cortex-M4 core with hardware FPU and MPU, paired with ST's Adaptive Real-Time (ART) Accelerator for zero-wait-state execution from Flash. Its interconnect matrix enables concurrent access to memory and peripherals without bus contention.

It integrates dual FDCAN controllers compliant with ISO 11898-1:2015 (CAN FD), supporting flexible data-rate up to 5 Mbit/s, alongside a dedicated USB Type-C™/USB PD controller (UCPD) with dead-battery charging capability and hardware authentication support - critical for modern embedded power management systems.

Key Specifications

Pinout & Package

STM32G491MCT3 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package, measuring 7 mm × 7 mm × 0.55 mm, with 0.4 mm pitch and exposed thermal pad. This RoHS-compliant ECOPACK2 package supports reflow soldering and delivers enhanced thermal performance for sustained 170 MHz operation in space-constrained applications.

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 STM32G491MCT3 adds critical USB-C PD and dual FDCAN functionality in a smaller UFQFPN48 package, while STM32H743VIT6 trades specialized analog/motor features for raw CPU performance - making the G491 optimal for cost-sensitive, analog-rich, USB-C–enabled industrial edge devices.

Availability

STM32G491MCT3 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, smart HMIs, and USB-C enabled edge nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32G491MCT3 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 analog components for industrial, automotive, and consumer markets.

The STM32G4 series targets high-efficiency digital power conversion and real-time motor control, integrating math accelerators, rich analog front-ends, and USB-C PD to replace discrete analog + MCU solutions in compact, cost-sensitive applications.

FAQ

What is the maximum operating temperature range for STM32G491MCT3?

The STM32G491MCT3 is specified for industrial temperature range: –40 °C to +85 °C ambient. Its thermal design supports continuous operation at 170 MHz within this range when mounted on a 2-layer PCB with adequate copper pour and thermal vias beneath the exposed pad. Junction temperature must remain below 125 °C per datasheet Section 6.10.

Does STM32G491MCT3 support hardware encryption or secure boot?

No, the STM32G491MCT3 does not include a cryptographic processor (AES, PKA, HASH) or secure boot ROM. It supports basic security features such as readout protection (RDP), proprietary code readout protection (PCROP), and securable memory areas, but lacks hardware-accelerated encryption engines found in STM32L5 or STM32U5 series.

Can the CORDIC unit perform hyperbolic functions or only trigonometric ones?

The CORDIC unit in STM32G491MCT3 supports only circular (sin, cos, atan) and linear (multiply, divide) modes per RM0440 Reference Manual Section 19. It does not implement hyperbolic (sinh, cosh) or exponential/logarithmic functions - those require software approximation or external coprocessor.

Is the UCPD controller capable of handling USB Power Delivery 3.0 Programmable Power Supply (PPS)?

Yes, the integrated UCPD controller supports USB PD 3.0 specification including PPS, with hardware-based voltage/current step control (20 mV/50 mA resolution) and fast transient response (<500 µs). It operates independently of the CPU core, enabling PPS negotiation during deep sleep modes without waking the Cortex-M4.