STMicroelectronics STM32G491RCI6

Overview

STM32G491RCI6 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 applications requiring high-precision signal processing and real-time responsiveness.

For engineers reviewing the STM32G491RCI6 datasheet, STM32G491RCI6 pinout, STM32G491RCI6 application, or STM32G491RCI6 equivalent, key selection criteria include its dual FDCAN support for automotive-grade communication, CORDIC/FMAC hardware accelerators for trigonometric and filtering math, 5 V-tolerant I/Os, UCPD interface for USB Type-C™ power delivery, and LQFP64 package with 51 GPIOs - all validated for industrial temperature range (–40°C to +85°C).

Technical Context

The STM32G491RCI6 implements a tightly coupled architecture where the ART Accelerator enables zero-wait-state execution from Flash at 170 MHz, while the interconnect matrix routes 16-channel DMA across multiple bus masters. Its analog subsystem integrates independent 16-bit ADCs with hardware oversampling and configurable sampling times, plus four OPAMPs usable in programmable-gain amplifier (PGA) mode with full terminal access.

Timing and control are managed by 15 timers including three 16-bit advanced motor control timers (TIM1/TIM8/TIM20) with dead-time generation, emergency stop, and complementary PWM outputs - essential for three-phase inverter gate driving. Dual FDCAN controllers support ISO 11898-1:2015 compliant flexible data-rate communication up to 5 Mbps.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 51 general-purpose I/Os (45 5 V-tolerant), 3 dedicated debug pins (SWDIO/SWCLK/NRST), and dedicated analog supply/ground pins (VDDA/VSSA, VREF+).

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 STM32G491RCI6 adds UCPD and dual FDCAN at identical Flash/SRAM size - critical for USB-C PD-enabled industrial chargers. Versus STM32H743VIT6, it delivers superior analog integration and deterministic low-latency control at half the dynamic power, making it optimal for embedded power electronics rather than general-purpose computing.

Availability

STM32G491RCI6 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, programmable logic controllers, and medical sensor hubs requiring stable component supply, long-term lifecycle assurance, and ECOPACK2 environmental compliance.

Supply support for STM32G491RCI6 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 is engineered for high-efficiency digital power conversion and real-time motor control, integrating math accelerators, rich analog peripherals, and robust communication interfaces into a single chip - reducing system complexity and bill-of-materials cost.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G491RCI6?

The STM32G491RCI6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone MIPS), measured using the ARM Dhrystone benchmark v2.1 under conditions of zero-wait-state Flash execution enabled by the ART Accelerator. This frequency is achievable across the full industrial temperature range (–40°C to +85°C) with VDD ≥ 2.7 V.

Does the STM32G491RCI6 support USB Type-C™ Power Delivery, and what hardware resources does it use?

Yes - the STM32G491RCI6 integrates a full USB Type-C™ Power Delivery (UCPD) controller compliant with USB PD 3.0. It uses dedicated hardware blocks including CC line monitoring, VCONN switch control, BMC transceiver, and policy engine, eliminating the need for an external UCPD IC. The UCPD peripheral connects directly to PA13/PA14 (CC1/CC2) and PB15 (VCONN).

How many analog-to-digital converters does the STM32G491RCI6 have, and what are their key resolution and speed specifications?

The STM32G491RCI6 integrates three independent 16-bit analog-to-digital converters (ADCs), each capable of up to 36 input channels and 0.25 µs conversion time (4 MSPS). All support hardware oversampling (up to 8×), programmable sampling times, and simultaneous sampling across multiple ADCs - enabling synchronized current/voltage acquisition in motor control applications.

What package type and pin count does the STM32G491RCI6 use, and is it RoHS/ECOPACK2 compliant?

The STM32G491RCI6 is supplied in a 64-pin LQFP package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad (package code: 5W). It is fully RoHS-compliant and certified to ST's ECOPACK2 standard, meeting JEDEC J-STD-020 moisture sensitivity level MSL3 and supporting lead-free reflow soldering profiles up to 260°C peak temperature.