STMicroelectronics STM32G491KEU3

Overview

STM32G491KEU3 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. It targets high-precision motor control, digital power conversion, and industrial sensing systems requiring real-time math acceleration.

For engineers reviewing the STM32G491KEU3 datasheet, STM32G491KEU3 pinout, STM32G491KEU3 application, or STM32G491KEU3 equivalent, key selection criteria include its dual FDCAN support for automotive/industrial networking, CORDIC+FMAC hardware accelerators for trigonometric and filter computations, 5 V-tolerant I/Os for mixed-voltage interfacing, and UCPD interface for USB Type-C™ power delivery control.

Technical Context

The STM32G491KEU3 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 ECC and PCROP, 96 KB main SRAM (32 KB with hardware parity), and 16 KB CCM-SRAM on 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 op-amps configurable as programmable-gain amplifiers, and dedicated CORDIC/FMAC accelerators for real-time signal processing in motor and power applications.

Key Specifications

Pinout & Package

STM32G491KEU3 is housed in a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch), compliant with ECOPACK2 environmental standards. The package supports compact board layout and thermal performance suitable for space-constrained industrial and motor control 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 STM32G491KEU3 adds UCPD and CORDIC/FMAC - critical for USB-C PD and real-time motor control. Versus STM32H743VIT6, it delivers targeted analog/math features in lower power and cost, without unnecessary M7 overhead or external PD complexity.

Availability

STM32G491KEU3 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, USB-C powered equipment, and programmable logic controller I/O modules requiring stable component supply across multi-year production cycles.

Supply support for STM32G491KEU3 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, MEMS, and automotive ICs.

The STM32G4 series is designed for real-time industrial and digital power applications, integrating high-precision analog peripherals, math accelerators, and communication interfaces like FDCAN and UCPD to replace discrete signal-chain components.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G491KEU3?

The STM32G491KEU3 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-precision floating-point unit (FPU) for real-time computation.

Does the STM32G491KEU3 support USB Type-C™ Power Delivery, and how is it implemented?

Yes - the STM32G491KEU3 integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller. It uses dedicated pins (UCPD1_DB, UCPD1_CC1/CC2) to handle BMC communication, CC line monitoring, VCONN switching, and PD message parsing per USB PD 3.0 specification - eliminating need for external PD ICs.

How many analog-to-digital converters does the STM32G491KEU3 include, and what are their key resolution and speed specifications?

The device integrates three independent 16-bit analog-to-digital converters, each capable of 0.25 µs conversion time (up to 4 MSPS). They support hardware oversampling (up to 16x), flexible channel sequencing (up to 36 total inputs), and synchronous sampling - critical for high-fidelity three-phase current sensing in motor drives.

What low-power modes are supported, and which peripherals remain active during Stop mode?

The STM32G491KEU3 supports Sleep, Stop, Standby, and Shutdown modes. In Stop 0/1 modes, the RTC, backup registers, and selected I/Os retain state while CPU and most clocks halt. The VBAT domain powers RTC and backup SRAM, and wake-up can occur via EXTI lines, RTC alarm, or FDCAN activity - enabling sub-1 µA retention current.