STMicroelectronics STM32G491MCT6

Overview

STM32G491MCT6 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 (including 16 KB CCM-SRAM with parity), and integrated analog peripherals including three 16-bit ADCs, four 12-bit DACs, four rail-to-rail comparators, and four operational amplifiers - deployed in motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G491MCT6 datasheet, STM32G491MCT6 pinout, STM32G491MCT6 application, or STM32G491MCT6 equivalent, key selection criteria include its dual FDCAN support for automotive/industrial networking, CORDIC+FMAC hardware accelerators for real-time math, UCPD interface for USB Type-C™ PD control, and LQFP48 package with 38 GPIOs (19 of which are 5 V tolerant).

Technical Context

The STM32G491MCT6 implements a tightly coupled Arm Cortex-M4 core with FPU and Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its memory subsystem includes 512 KB Flash with PCROP and ECC, 96 KB main SRAM (32 KB with hardware parity), and 16 KB CCM-SRAM accessible by both instruction and data buses.

Analog integration centers on three independent 16-bit ADCs (0.25 µs conversion, up to 36 channels), four 12-bit DACs (2 buffered external @ 1 MSPS, 2 unbuffered internal @ 15 MSPS), four programmable-gain op-amps, and voltage reference buffer supporting 2.048 V / 2.5 V / 2.9 V outputs - all synchronized via shared clock domains and DMA routing.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 38 user-accessible GPIOs - 19 pins support 5 V tolerance, all mappable to external interrupt vectors. Power supply includes dedicated VDD/VDDA (1.71–3.6 V), VSS/VSSA, VREF+, VBAT, and NRST.

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 STM32G491MCT6 adds essential hardware accelerators and UCPD for USB-C PD systems; versus STM32H743VIT6, it delivers superior analog integration and deterministic low-latency math at lower power and BOM cost for control-dominant applications.

Availability

STM32G491MCT6 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, USB-C PD hub design, and programmable logic controller I/O modules requiring stable component supply across long-lifecycle production programs.

Supply support for STM32G491MCT6 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, analog-rich embedded control applications - combining real-time performance, mathematical acceleration, and robust industrial I/O in a single-chip solution.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32G491MCT6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone MIPS). This is achieved using the ART Accelerator for zero-wait-state Flash execution and includes full DSP instruction support and single-cycle MAC operations enabled by the integrated FPU.

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

Yes - the STM32G491MCT6 integrates a dedicated USB Type-C™ / Power Delivery (UCPD) controller with CC line monitoring, PD protocol engine, and VCONN switching. It handles physical layer signaling, policy engine execution, and sideband alert management without requiring an external PD controller IC.

How many analog-to-digital converters does the STM32G491MCT6 include, and what are their key capabilities?

The device integrates three independent 16-bit ADCs, each capable of 0.25 µs conversion time across up to 36 total channels. Features include hardware oversampling (up to 12-bit effective resolution), selectable resolution (8–16 bit), and flexible trigger sources - enabling simultaneous multi-channel acquisition for motor current sensing or power quality monitoring.

What packaging and pin count does the STM32G491MCT6 use, and how many GPIOs are available?

The STM32G491MCT6 uses the LQFP48 package (7 × 7 mm, 0.5 mm pitch) and provides 38 user-accessible GPIOs. Of these, 19 pins are 5 V tolerant - allowing direct interfacing with industrial-level logic, sensors, or legacy peripherals without level-shifting circuitry.