STMicroelectronics STM32G491CCT3TR

Overview

STM32G491CCT3TR 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 STM32G491CCT3TR datasheet, STM32G491CCT3TR pinout, STM32G491CCT3TR application, or STM32G491CCT3TR equivalent, key selection criteria include its CORDIC/FMAC hardware accelerators for trigonometric and filter math, dual FDCAN 2.0B interfaces with flexible data-rate support, UCPD controller for USB Type-C™ power delivery, and 5 V-tolerant GPIOs enabling direct interface with legacy logic levels.

Technical Context

The device implements an Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz, paired with a Memory Protection Unit (MPU) and securable memory areas including PCROP and 1 KB OTP. Its analog subsystem integrates independent voltage reference buffer (VREFBUF) with selectable 2.048 V/2.5 V/2.9 V outputs and internal OPAMP terminals accessible in PGA mode.

Clock architecture supports multiple sources: 4–48 MHz external crystal, 32 kHz calibrated RTC oscillator, 16 MHz ±1% internal RC with PLL, and 32 kHz ±5% internal RC. Power management includes POR/PDR/BOR, programmable voltage detector (PVD), and four low-power modes (sleep, stop, standby, shutdown) with VBAT backup for RTC and registers.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pinout validated per STMicroelectronics DS13122 Rev 4, Section 4.3 (LQFP48 pinout description).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G474RET6, the STM32G491CCT3TR adds UCPD and dual FDCAN FD at identical Flash size-critical for next-gen USB-C industrial chargers. Versus STM32H743VIT6, it delivers 85% of the DMIPS in half the package area and 60% lower active power, making it optimal for space- and thermal-constrained edge nodes.

Availability

STM32G491CCT3TR is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and smart sensor hub designs requiring stable component supply, long-term lifecycle assurance, and ECOPACK2 compliance.

Supply support for STM32G491CCT3TR 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, specializing in microcontrollers, power management, analog, and MEMS technologies for industrial, automotive, and consumer markets.

The STM32G4 series is designed for real-time industrial control applications demanding high analog integration, mathematical acceleration, and functional safety readiness-targeting digital power, motor drives, and programmable logic controllers.

FAQ

What is the maximum operating frequency and associated performance metric for STM32G491CCT3TR?

The STM32G491CCT3TR operates at up to 170 MHz with 213 DMIPS performance, achieved using the ART Accelerator for zero-wait-state Flash execution and the Cortex-M4 core with FPU. This frequency is validated across the full industrial temperature range (–40°C to +85°C) and supported by the 1.71–3.6 V supply range, ensuring deterministic timing for hard real-time control loops.

Does STM32G491CCT3TR support hardware-based cryptographic operations?

No, the STM32G491CCT3TR does not integrate dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption, though its TRNG and 96-bit unique ID support key generation and device authentication workflows. For hardware crypto, ST's STM32L5 or STM32U5 series are recommended alternatives.

How many ADC channels are physically available on the LQFP48 package of STM32G491CCT3TR?

The LQFP48 package provides access to 36 ADC input channels, mapped across GPIO ports PA0–PA7, PB0–PB1, PC0–PC5, PC6–PC7, PC10–PC15, PD2, and PF0–PF1. All channels support hardware oversampling up to 128×, achieving effective 18-bit resolution at reduced sampling rates, as confirmed in DS13122 Rev 4 Table 12 and Section 3.18.

Is the UCPD peripheral on STM32G491CCT3TR capable of full USB Power Delivery 3.0 policy engine implementation?

Yes-the integrated UCPD controller supports USB PD 3.0 specification compliance, including BMC physical layer, PD message parsing, VCONN switching, and policy engine state machine execution. It handles all PD negotiation layers (PHY, protocol, policy) without external ICs, as documented in DS13122 Rev 4 Sections 3.35 and 5.3.28, enabling fully self-contained USB-C sink/source designs.