STMicroelectronics STM32G491RCT6

Overview

STM32G491RCT6 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 systems requiring real-time math acceleration via CORDIC and FMAC.

For engineers reviewing the STM32G491RCT6 datasheet, STM32G491RCT6 pinout, STM32G491RCT6 application, or STM32G491RCT6 equivalent, key selection considerations include its LQFP64 package, dual FDCAN support for automotive-grade communication, hardware math accelerators for deterministic control loops, and 5 V-tolerant I/Os enabling direct interfacing with legacy logic.

Technical Context

The STM32G491RCT6 implements a tightly coupled Arm Cortex-M4 core with FPU and MPU, paired with ST's Adaptive Real-Time (ART) Accelerator for zero-wait-state execution from Flash at 170 MHz. Its interconnect matrix routes 16 DMA channels across multiple AHB/APB buses, supporting concurrent high-bandwidth transfers between ADCs, DACs, timers, and communication peripherals.

It integrates dual FDCAN controllers compliant with ISO 11898-1:2015 (FD mode up to 5 Mbps), USB 2.0 full-speed with LPM/BCD, UCPD for USB Type-C™ power delivery negotiation, and a dedicated low-power timer (LPTIM1) with ultra-low wake-up latency from Stop modes - all synchronized via a multi-source clock system with PLL, 4–48 MHz external crystal support, and calibrated 32 kHz RC oscillator.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified, rated for industrial temperature range (–40 °C to +85 °C).

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 STM32G491RCT6 adds hardware math acceleration and USB-C PD control at identical Flash size, while STM32H743VIT6 trades deterministic analog co-processing for general-purpose compute headroom - making the G491 optimal for resource-constrained, analog-rich real-time systems.

Availability

STM32G491RCT6 is available at Aetrix Electronics and suitable for motor control systems, digital power converters, industrial sensor hubs, and USB-C PD source designs requiring stable component supply across extended production lifecycles.

Supply support for STM32G491RCT6 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 ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32G4 series targets high-efficiency digital power, motor control, and analog-intensive embedded applications, combining Cortex-M4 performance with ST's proprietary analog IP and hardware math acceleration for deterministic real-time control.

FAQ

What is the maximum operating frequency and associated DMIPS rating of the STM32G491RCT6?

The STM32G491RCT6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1). This is achieved using the ART Accelerator for zero-wait-state Flash execution and includes full FPU support for IEEE 754 single-precision floating-point operations, validated under industrial temperature conditions (–40 °C to +85 °C) with VDD = 3.3 V.

Does the STM32G491RCT6 support USB Type-C™ Power Delivery, and what hardware blocks enable it?

Yes - the STM32G491RCT6 integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller with hardware BMC encoding/decoding, CC line monitoring, VCONN switching, and PD protocol stack acceleration. Pins PA8 (CC1), PA9 (CC2), and PA10 (VCONN) provide direct physical-layer interface, eliminating need for external PD controllers in compact AC/DC adapters and docking stations.

How many analog-to-digital converters does the STM32G491RCT6 include, and what are their key resolution and speed specifications?

The STM32G491RCT6 includes three independent 12/16-bit ADCs with up to 36 input channels, capable of 0.25 µs conversion time (up to 4 MSPS in interleaved mode). Each supports hardware oversampling (up to 16×), configurable resolution (6–16 bits), and 0–3.6 V input range. Calibration data is stored in system memory, ensuring <±1 LSB INL across the industrial temperature range.

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

The STM32G491RCT6 supports Sleep, Stop, Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped, 8 KB SRAM + RTC retained), typical current consumption is 1.1 µA at 25 °C and 3.3 V. This includes RTC oscillator running from LSE, backup registers preserved, and wake-up possible via EXTI, RTC alarm, or FDCAN activity - verified per DS13122 Rev 4 electrical characteristics table 29.