STMicroelectronics STM32G491CEU3

Overview

STM32G491CEU3 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, operating at 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 and industrial sensing applications requiring real-time math acceleration.

For engineers reviewing the STM32G491CEU3 datasheet, STM32G491CEU3 pinout, STM32G491CEU3 application, or STM32G491CEU3 equivalent, key selection criteria include its CORDIC/FMAC hardware accelerators for trigonometric and filter computations, 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 interfacing with legacy logic.

Technical Context

The STM32G491CEU3 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 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 closed-loop control systems.

Key Specifications

Pinout & Package

STM32G491CEU3 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package measuring 7 mm × 7 mm with 0.5 mm pitch, optimized for space-constrained industrial and motor control PCB layouts. The package features exposed thermal pad for enhanced thermal dissipation and full ECOPACK2 environmental compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G474RET6, the STM32G491CEU3 adds critical hardware accelerators for motor control and USB-C PD, while versus STM32H743VIT6 it trades peak CPU speed for deterministic analog compute and smaller footprint-making it optimal for cost-sensitive, analog-intensive embedded systems.

Availability

STM32G491CEU3 is available at Aetrix Electronics and suitable for industrial motor control, smart power delivery, programmable logic controllers, and high-accuracy sensor hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32G491CEU3 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 automotive semiconductors since 1987.

The STM32G4 series targets high-efficiency digital power conversion and real-time motor control, integrating analog peripherals and hardware math accelerators to reduce firmware complexity and improve system-level determinism.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the STM32G491CEU3?

The STM32G491CEU3 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1), achieved via the Arm Cortex-M4 core with FPU and ART Accelerator enabling zero-wait-state Flash execution. This frequency is sustained across the full industrial temperature range (–40 °C to +85 °C) under specified VDD conditions (1.71–3.6 V).

Does the STM32G491CEU3 support USB Type-C™ Power Delivery negotiation natively?

Yes-the STM32G491CEU3 integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller compliant with USB PD 3.0 specification. It handles physical layer signaling, BMC decoding, CRC validation, and policy engine timing without external transceivers, supporting sink-only, source-only, or dual-role configurations via firmware configuration.

How many analog-to-digital converters does the STM32G491CEU3 include, and what are their key resolution and speed specifications?

The device integrates three independent 16-bit analog-to-digital converters (ADC1/ADC2/ADC3), each capable of 0.25 µs conversion time (up to 4 MSPS). All support hardware oversampling (up to 16×), programmable sampling time, and flexible channel sequencing. Conversion range is 0 to VREFINT (1.2 V) or 0 to VDDA (3.6 V), with built-in temperature sensor and VREFINT calibration values stored in system memory.

What low-power modes are supported, and what is the typical current consumption in Stop 0 mode?

The STM32G491CEU3 supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped except LSE/LSI, SRAM and registers retained), typical current consumption is 2.3 µA at 25 °C with VDD = 3.3 V and RTC running from LSE. Wakeup latency is ≤5 µs via EXTI or RTC alarm, enabling ultra-low-power periodic sensing applications.