STMicroelectronics STM32G491REY6TR

Overview

STM32G491REY6TR 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 STM32G491REY6TR datasheet, STM32G491REY6TR pinout, STM32G491REY6TR application, or STM32G491REY6TR equivalent, key selection criteria include its 170 MHz Cortex-M4+FPU core, dual-bank Flash with PCROP, CORDIC/FMAC math accelerators, 5 V-tolerant GPIOs, and UFQFPN48 package compatibility with space-constrained embedded control designs.

Technical Context

The device implements a tightly coupled interconnect matrix enabling concurrent access to flash, SRAM, and peripherals without bus contention. Its ART Accelerator delivers zero-wait-state execution from Flash at full 170 MHz, while the CCM SRAM (16 KB) provides deterministic low-latency instruction/data access for real-time control loops.

Hardware math acceleration includes dedicated CORDIC for sin/cos/tan/atan/range reduction and FMAC for FIR/IIR filter coefficient updates - both accessible via DMA-triggered register interfaces. The analog subsystem integrates op-amps configurable as programmable-gain amplifiers (PGA) with external feedback paths and internal voltage reference buffer (VREFBUF) supporting 2.048 V / 2.5 V / 2.9 V outputs.

Key Specifications

Pinout & Package

STM32G491REY6TR is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package measuring 7 mm × 7 mm with 0.5 mm pitch, optimized for thermal performance and board-space efficiency in industrial control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G474RET6, the STM32G491REY6TR adds UCPD, dual FDCAN, CORDIC, and FMAC - making it uniquely suited for USB-C-powered industrial edge devices with demanding analog and real-time math requirements; versus STM32H743VIT6, it offers better power efficiency and smaller footprint for single-core deterministic control tasks.

Availability

STM32G491REY6TR 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 extended product lifecycles.

Supply support for STM32G491REY6TR 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, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32G4 series targets high-efficiency digital power conversion, motor control, and analog-intensive embedded applications - combining Cortex-M4 performance with hardware math acceleration and rich analog integration in compact packages.

FAQ

What is the maximum operating frequency and associated DMIPS rating of the STM32G491REY6TR?

The STM32G491REY6TR operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1). This is achieved using the Adaptive Real-Time Accelerator (ART) to enable zero-wait-state execution from Flash memory, confirmed in Section 3.2 of DS13122 Rev 4.

Does the STM32G491REY6TR support hardware-accelerated mathematical functions, and if so, which ones?

Yes - it integrates two dedicated hardware accelerators: CORDIC for trigonometric and hyperbolic functions (sin, cos, atan, sqrt), and FMAC for filter coefficient updates and MAC operations. Both are accessible via memory-mapped registers and support DMA-triggered operation per Sections 3.8 and 3.9 of the datasheet.

What analog peripherals are integrated, and how many ADC/DAC channels are available?

The device integrates three independent 16-bit ADCs supporting up to 36 input channels with hardware oversampling, four 12-bit DAC channels (two buffered external, two unbuffered internal), four rail-to-rail comparators, and four fully accessible operational amplifiers usable in PGA mode - all detailed in Sections 3.18–3.22 of DS13122 Rev 4.

Which package type and pin count does the STM32G491REY6TR use, and what are its key mechanical dimensions?

STM32G491REY6TR uses the UFQFPN48 package (7 mm × 7 mm body, 0.5 mm pitch), specified in Section 6.3 of DS13122 Rev 4. It has 48 terminals, no exposed pad, and complies with ECOPACK2 environmental standards - optimized for thermal dissipation and high-density PCB layouts.