STMicroelectronics STM32G491MES6

Overview

STM32G491MES6 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 requiring real-time math acceleration.

For engineers reviewing the STM32G491MES6 datasheet, STM32G491MES6 pinout, STM32G491MES6 application, or STM32G491MES6 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 levels.

Technical Context

The STM32G491MES6 implements a tightly coupled architecture where the ART Accelerator enables zero-wait-state execution from Flash at 170 MHz, while the CORDIC and FMAC units offload computationally intensive math operations from the CPU-critical for real-time field-oriented control (FOC) and adaptive filtering in power electronics. Its memory subsystem includes 96 KB main SRAM (first 32 KB with hardware parity), 16 KB CCM-SRAM on both instruction and data buses, and 1 KB OTP for secure configuration storage.

Timing and connectivity are optimized for deterministic operation: it integrates two FDCAN controllers compliant with ISO 11898-1:2015, supporting bit rates up to 5 Mbps in FD mode; a USB 2.0 full-speed interface with LPM/BCD; and a dedicated UCPD peripheral with integrated transceivers for USB Type-C™ port negotiation and power role swapping-eliminating external PHY requirements in compact power adapters.

Key Specifications

Pinout & Package

STM32G491MES6 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package with 0.5 mm pitch, measuring 7 mm × 7 mm. The package supports reflow soldering per JEDEC J-STD-020 and features exposed thermal pad for enhanced heat dissipation in motor drive and SMPS applications.

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 STM32G491MES6 adds UCPD and dual FDCAN at identical Flash size but with tighter SRAM parity coverage; versus STM32H743VIT6, it delivers targeted analog/math acceleration in a smaller 7×7 mm package-ideal for space-constrained USB-C PD and motor control designs.

Availability

STM32G491MES6 is available at Aetrix Electronics and suitable for industrial motor drives, USB-C power adapters, and programmable logic controllers requiring stable component supply, long-term lifecycle assurance, and ECOPACK2-compliant packaging.

Supply support for STM32G491MES6 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, MEMS, and automotive semiconductors since 1987.

The STM32G4 series targets high-efficiency digital power conversion and precision motor control, integrating math accelerators, rich analog peripherals, and USB-C PD controllers to replace multi-chip solutions in compact, thermally constrained applications.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the STM32G491MES6?

The STM32G491MES6 operates at up to 170 MHz with an integer performance of 213 DMIPS (Dhrystone 2.1), verified under conditions of 1.71–3.6 V supply and ambient temperature range –40°C to +85°C. This rating assumes ART Accelerator enabled and zero-wait-state Flash execution, confirmed in ST's DS13122 Rev 4 datasheet Section 3.1.

Does the STM32G491MES6 support USB Type-C™ Power Delivery without external components?

Yes-the STM32G491MES6 integrates a full USB Type-C™ Power Delivery (UCPD) controller with physical layer transceivers, CC line detection, and PD message handling per USB PD 3.0 specification. No external UCPD IC or level shifters are required for basic sink functionality, as validated in Application Note AN5117 and Reference Manual RM0440.

How many analog-to-digital converter channels does the STM32G491MES6 support, and what is their maximum resolution?

The device integrates three independent 16-bit ADCs supporting up to 36 external channels total, with hardware oversampling enabling effective resolution up to 18 bits. Each ADC achieves 0.25 µs conversion time across 0–3.6 V input range, as specified in Section 3.18 of DS13122 Rev 4 and electrically characterized in Table 18 of Section 5.3.18.

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

The STM32G491MES6 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 1.9 µA at 25°C with VDD = 3.3 V, per Table 30 in Section 5.3.30 of DS13122 Rev 4-verified using the STM32CubeG4 firmware library example PWR_StopMode.