STMicroelectronics STM32G491KEU6

Overview

STM32G491KEU6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 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 - deployed in motor control, industrial sensing, and digital power conversion systems.

For engineers reviewing the STM32G491KEU6 datasheet, STM32G491KEU6 pinout, STM32G491KEU6 application, or STM32G491KEU6 equivalent, key selection considerations include its dual FDCAN 2.0B/FD interfaces, CORDIC + FMAC math accelerators, UCPD controller for USB Type-C™ PD, and UFQFPN48 package with 48 I/Os (19 of which are 5 V tolerant).

Technical Context

The STM32G491KEU6 implements an Arm Cortex-M4 core with hardware FPU and Adaptive Real-time Accelerator (ART) enabling zero-wait-state execution from Flash at 170 MHz. Its memory subsystem includes 512 KB Flash with PCROP and ECC, plus 112 KB SRAM segmented into 96 KB general-purpose SRAM (first 32 KB with parity), 16 KB CCM-SRAM (instruction/data bus, parity-checked), and dedicated 1 KB OTP.

Analog integration centers on three independent 16-bit ADCs (0.25 µs conversion, up to 36 channels, hardware oversampling), four 12-bit DACs (2 buffered external @ 1 MSPS, 2 unbuffered internal @ 15 MSPS), four op-amps configurable as PGAs, and voltage reference buffer supporting 2.048 V / 2.5 V / 2.9 V outputs - all co-located with 15 timers including three advanced motor-control timers with dead-time generation and emergency stop.

Key Specifications

Pinout & Package

STM32G491KEU6 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, designed for high-density PCB layouts and thermal efficiency in compact industrial and portable applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G474RET6, the STM32G491KEU6 adds UCPD, CORDIC/FMAC, and VREFBUF - enabling USB-C PD implementation and deterministic motor control loops. Versus STM32H743VIT6, it delivers optimized analog integration and smaller footprint at lower cost and power, without sacrificing real-time determinism.

Availability

STM32G491KEU6 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and USB-C PD source designs requiring stable component supply, long-term manufacturability, and qualified automotive-grade alternatives.

Supply support for STM32G491KEU6 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 applications - specifically engineered for digital power, motor control, and USB-C PD systems where real-time determinism, integrated math acceleration, and mixed-signal precision are critical.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32G491KEU6?

The STM32G491KEU6 operates at up to 170 MHz with an ART Accelerator enabling zero-wait-state execution from Flash, delivering 213 DMIPS (Dhrystone MIPS) and 363 CoreMark points. Its Cortex-M4 core includes a hardware FPU and DSP instruction set, validated per ARM's CMSIS-DSP library benchmarks under 3.3 V and 25 °C conditions.

Does the STM32G491KEU6 support USB Type-C™ Power Delivery, and what hardware blocks enable it?

Yes - the STM32G491KEU6 integrates a full USB Type-C™ Power Delivery (UCPD) controller with physical layer (PHY), BMC line encoding/decoding, and protocol engine. It supports PD 3.0 negotiation, VCONN switching, and VBUS monitoring via internal comparators - eliminating need for external UCPD ICs in source-port implementations.

How many analog-to-digital converters does the STM32G491KEU6 include, and what are their key resolution and speed specifications?

The device integrates three independent 16-bit ADCs, each capable of 0.25 µs conversion time (up to 4 MSPS), with hardware oversampling up to 20-bit effective resolution. They support up to 36 external channels, simultaneous sampling, and flexible trigger sources - validated per DS13122 Rev 4 Section 3.18 and Table 5.3.18.

What package type and pin count does the STM32G491KEU6 use, and are any I/Os 5 V tolerant?

The STM32G491KEU6 uses a 48-pin UFQFPN (Ultra-Fine Pitch Quad Flat No-lead) package, 7 mm × 7 mm, 0.5 mm pitch. Of its 38 GPIOs, 19 pins (including PA0–PA7, PB0–PB1, PC0–PC5, PF0–PF1) are explicitly rated 5 V tolerant per datasheet Table 5.3.14 - enabling direct interfacing with 5 V logic and sensors without level shifters.