STMicroelectronics STM32G491MCS6

Overview

STM32G491MCS6 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 supports FDCAN, USB FS, UCPD, and advanced motor control timers - deployed in industrial motor drives and precision sensor signal conditioning systems.

For engineers reviewing the STM32G491MCS6 datasheet, STM32G491MCS6 pinout, STM32G491MCS6 application, or STM32G491MCS6 equivalent, key selection criteria include its 170 MHz real-time performance with ART Accelerator, dual-bank flash with PCROP security, CORDIC/FMAC math accelerators for motor control, and 5 V-tolerant GPIOs enabling direct interface with legacy industrial I/O.

Technical Context

The STM32G491MCS6 implements a tightly coupled Arm Cortex-M4 core with hardware FPU and Memory Protection Unit (MPU), paired with ST's Adaptive Real-Time (ART) Accelerator for zero-wait-state execution from flash. Its interconnect matrix enables concurrent access to flash, SRAM, and peripherals without bus contention.

It integrates dual-domain clocking: high-precision 4–48 MHz external crystal oscillator plus 32 kHz RTC crystal, complemented by factory-trimmed internal RC oscillators (16 MHz ±1%, 32 kHz ±5%). The peripheral set includes three independent 16-bit ADCs with hardware oversampling (up to 16-bit effective resolution) and four 12-bit DACs - two buffered external (1 MSPS), two unbuffered internal (15 MSPS).

Key Specifications

Pinout & Package

STM32G491MCS6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), compliant with ECOPACK2 environmental standards. 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 STM32G491MCS6 adds USB-C PD capability and enhanced analog integration for sensor/motor convergence; versus STM32H743VIT6, it delivers superior analog compute density and lower active power per DMIPS in embedded control.

Availability

STM32G491MCS6 is available at Aetrix Electronics and suitable for industrial motor drives, precision sensor signal conditioning, USB-C power delivery systems, and smart grid edge controllers requiring stable component supply across long-lifecycle deployments.

Supply support for STM32G491MCS6 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-rich embedded control applications - combining real-time determinism, mathematical acceleration, and robust industrial I/O in a single chip for motor control, digital power, and sensing edge nodes.

FAQ

What is the maximum operating frequency and associated DMIPS rating?

The STM32G491MCS6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1). This is achieved with the ART Accelerator enabled and zero-wait-state flash execution. The FPU supports IEEE 754 single-precision operations, and the MPU allows memory region protection for RTOS-based applications.

Does STM32G491MCS6 support USB-C Power Delivery negotiation?

Yes - it integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller compliant with USB PD 3.0. The hardware handles CC line monitoring, VCONN switching, SOP' packet parsing, and policy engine state transitions without CPU intervention, enabling sub-100 ms role swaps and robust cable detection.

How many ADC channels and what is the effective resolution with oversampling?

The device contains three independent 12-bit ADCs, each supporting hardware oversampling up to 16×. With 16× oversampling and digital filtering, effective resolution reaches 16 bits at 100 kSPS. All 36 input channels are multiplexed across the three ADCs, and they support simultaneous sampling for 3-phase current reconstruction.

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

Eight low-power modes are supported: Sleep, Low-power Sleep, Stop 0, Stop 1, Standby, Shutdown, VBAT-only, and Low-power Run. In Stop 0 mode with RTC and SRAM retention, typical current is 2.5 µA; in Shutdown mode with VBAT only, it drops to 0.4 µA. Wake-up latency from Stop 0 is under 5 µs.