STMicroelectronics STM32G491CEU3TR

Overview

STM32G491CEU3TR 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.

For engineers reviewing the STM32G491CEU3TR datasheet, STM32G491CEU3TR pinout, STM32G491CEU3TR application, or STM32G491CEU3TR 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 5 V-tolerant GPIOs enabling direct interfacing with legacy logic.

Technical Context

The STM32G491CEU3TR implements an Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz, paired with a Memory Protection Unit (MPU) for secure task isolation. Its analog subsystem integrates three independent 16-bit ADCs (0.25 µs conversion, hardware oversampling), four 12-bit DACs (2 buffered external @ 1 MSPS, 2 unbuffered internal @ 15 MSPS), and four op-amps configurable in PGA mode with full terminal access.

Timing and connectivity are enhanced by two FDCAN controllers supporting flexible data-rate (up to 5 Mbps), a USB 2.0 full-speed interface with LPM/BCD, and a dedicated UCPD peripheral for USB Type-C™ power delivery negotiation. The device supports multiple low-power modes (Stop 0/1, Standby, Shutdown) with RTC wakeup and VBAT backup capability.

Key Specifications

Pinout & Package

STM32G491CEU3TR is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pin functions are validated per STMicroelectronics DS13122 Rev 4 Section 4.2 (UFQFPN48 pinout description).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G474RET6, the STM32G491CEU3TR adds hardware math acceleration and UCPD for embedded USB-C PD systems; versus STM32H743VIT6, it trades raw CPU speed for richer analog integration and lower power, making it optimal for compact, sensor- and power-converter–centric designs.

Availability

STM32G491CEU3TR is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, programmable logic controllers, and smart sensor edge nodes requiring stable component supply, long-term manufacturability, and qualified automotive-grade alternatives.

Supply support for STM32G491CEU3TR 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-performance, analog-intensive embedded applications-specifically digital power conversion, motor control, and industrial automation-with emphasis on hardware-accelerated math, rich mixed-signal integration, and robust real-time determinism.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G491CEU3TR?

The STM32G491CEU3TR operates at up to 170 MHz, delivering 213 DMIPS (Dhrystone MIPS) with its Arm Cortex-M4 core and FPU. This performance is sustained with zero wait states thanks to the Adaptive Real-Time (ART) Accelerator, which caches flash accesses. Measured under EEMBC CoreMark v1.0, it achieves 553 points, confirming deterministic real-time execution for control-critical applications like motor commutation and digital power regulation.

Does the STM32G491CEU3TR support USB Type-C™ Power Delivery, and how is it implemented?

Yes-the STM32G491CEU3TR integrates a dedicated USB Type-C™ and Power Delivery (UCPD) peripheral compliant with USB PD 3.0. It handles physical layer signaling (CC1/CC2), BMC encoding/decoding, PD message parsing, and role swapping (DFP/UFP) in hardware. No external PD controller is required, reducing BOM count and PCB area. The UCPD block operates independently of the CPU, enabling low-latency fault response and concurrent USB FS communication.

How many analog-to-digital converters does the STM32G491CEU3TR include, and what are their key resolution and timing specifications?

The STM32G491CEU3TR includes three independent 16-bit ADCs supporting up to 36 input channels total. Each achieves 0.25 µs conversion time (4 MSPS), with hardware oversampling up to 16× for effective resolution enhancement (e.g., 16-bit @ 250 kSPS). They operate across the full 0–3.6 V input range, support simultaneous sampling, and integrate internal temperature sensing and VREFINT calibration for measurement accuracy without external references.

What low-power modes are supported, and what is the lowest achievable current consumption?

The STM32G491CEU3TR supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. In Shutdown mode-with all clocks stopped, regulators disabled, and only VBAT and RTC active-it draws just 30 nA typical current (measured at 25°C, VDD = 3.3 V). Stop 1 mode retains SRAM and register content while consuming 190 nA typical, enabling sub-millisecond wake-up for responsive sensor-triggered events.