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STMicroelectronics STM32G491KCU6

Name: STM32G491KCU6
Brand: STMicroelectronics
SKU: STM32G491KCU6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G491KCU6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 32-UFQFN Exposed Pad

Datasheet:: STM32G491KCU6.pdf

Description:: IC MCU 32BIT 256KB FLSH 32UFQFPN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STM32G491KCU6 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 - deployed in motor control, industrial sensing, and digital power conversion systems.

For engineers reviewing the STM32G491KCU6 datasheet, STM32G491KCU6 pinout, STM32G491KCU6 application, or STM32G491KCU6 equivalent, key selection considerations include its dual FDCAN support for automotive-grade communication, CORDIC/FMAC hardware accelerators for real-time math, UCPD interface for USB Type-C™ PD implementation, and 5 V-tolerant I/Os enabling direct interfacing with legacy logic.

Technical Context

The STM32G491KCU6 implements an Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz, paired with a Memory Protection Unit (MPU) and securable memory areas including PCROP and 1 KB OTP. Its interconnect matrix routes 16 DMA channels across multiple AHB/APB buses for concurrent peripheral access.

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, and a dedicated USB Type-C™/PD controller (UCPD) with VBUS monitoring and role swap support - all synchronized via a flexible clock tree with four oscillators (4–48 MHz HSE, 32 kHz LSE, 16 MHz/32 kHz RC).

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU and DSP instructions, enabling single-cycle MAC and IEEE 754-compliant floating-point math for motor control loops.
Max Clock Frequency	170 MHz with ART Accelerator - delivers 213 DMIPS and deterministic real-time response without external cache.
Flash Memory	512 KB with ECC and PCROP - supports secure firmware updates and prevents unauthorized code extraction.
SRAM	112 KB total: 96 KB general-purpose (32 KB with parity), 16 KB CCM-SRAM on instruction/data bus - optimized for time-critical ISR and control algorithm storage.
Analog Peripherals	3 × 16-bit ADCs (0.25 µs conversion, hardware oversampling), 4 × 12-bit DACs (2 buffered @ 1 MSPS, 2 unbuffered @ 15 MSPS), 4 OPAMPs (PGA mode), 4 comparators - enables closed-loop analog signal chain integration.
Communication	2 × FDCAN, 5 × USART/UART (incl. LIN/IrDA), 3 × I²C (Fast Mode Plus), 3 × SPI, 1 × SAI, USB FS, UCPD - supports mixed-signal system-level connectivity without external transceivers.
Math Accelerators	CORDIC (sin/cos/atan/sqrt/log) and FMAC (filter coefficient update in <100 ns) - offloads >90% of trigonometric and FIR/IIR computation from CPU.

Pinout & Package

STM32G491KCU6 is housed in a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch), with exposed thermal pad for enhanced power dissipation in compact motor drive and power supply applications.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core & analog supply	1.71–3.6 V operation; separate analog domain ensures ADC/DAC reference stability during digital switching.
VSS, VSSA	Digital & analog ground	Independent grounding reduces noise coupling into sensitive analog circuits (ADC, OPAMP, VREFBUF).
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2	General-purpose I/O	Up to 86 fast I/Os; 5 V-tolerant on selected pins (e.g., PA0–PA15, PB0–PB15) - simplifies level-shifting with 5 V sensors/peripherals.
PA13/PA14/PA15	SWD debug interface	Serial Wire Debug (SWD) only - minimal 2-pin debug footprint vs. JTAG; no SWO trace output in this variant.
PA11/PA12	USB DP/DM	Full-speed USB 2.0 physical layer - requires no external PHY; supports BCD charging detection and LPM.
PA9/PA10	USART1 TX/RX	Default asynchronous UART interface - configurable for LIN, IrDA, or modem control signals (RTS/CTS).
PA1/PA2/PA3	FDCAN1 TX/RX/STBY	Dual FDCAN transceiver interface - supports CAN FD data rates up to 5 Mbps and protocol arbitration in automotive subsystems.
VBAT	RTC backup supply	Enables calendar RTC and 32 backup registers during main power loss - accepts 1.65–3.6 V battery input.

Key Features

Feature	Design Value
CORDIC accelerator	Hardware trigonometric engine delivering sin/cos/atan/sqrt in ≤10 cycles - cuts motor vector control loop latency by 65% vs. software implementation.
FMAC unit	Dedicated filter math accelerator supporting 32-bit coefficient updates in <100 ns - enables real-time adaptive filtering for EMI suppression in digital power supplies.
VREFBUF	Programmable internal voltage reference (2.048 V / 2.5 V / 2.9 V) with ±0.5% accuracy - eliminates external precision reference ICs for ADC/DAC calibration.
UCPD controller	Integrated USB Type-C™ Power Delivery PHY and protocol engine - handles VCONN sourcing, role swap, and PDO negotiation without host MCU intervention.
Advanced timers	Three 16-bit advanced motor control timers (TIM1/TIM8/TIM20) with 8-channel PWM, dead-time insertion, and emergency stop - supports 3-phase BLDC/PMSM commutation in single-chip inverters.

Applications

Industrial Motor Control

Digital Power Supply

Use Scenario: Field-oriented control (FOC) of 3-phase BLDC motors in HVAC blowers and industrial pumps.

IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM generation with <100 ns dead-time precision, and current/voltage sensing via integrated ADCs and OPAMPs.

Use Value: Eliminates external gate drivers, current sense amps, and math co-processors - reduces BOM count by 7 components and PCB area by 35%.

Use Scenario: Digital AC-DC and DC-DC converters with adaptive voltage regulation and fault protection.

IC Role / Device Role / Timing Role: Closed-loop PID control using FMAC-accelerated filters, isolated feedback sampling via sigma-delta ADC interface, and synchronous rectification timing.

Use Value: Achieves <1% output voltage ripple and <10 µs overvoltage shutdown response - meets IEC 62368-1 safety requirements without secondary controller.

Automotive Body Electronics

USB-C Enabled Industrial Tooling

Use Scenario: Seat/mirror position memory, window lift control, and lighting dimming modules in 12 V vehicle architectures.

IC Role / Device Role / Timing Role: Dual FDCAN node handling body control messages, LIN gateway functionality, and analog sensor fusion (temperature, position, current).

Use Value: Supports ASAM MCD-2 MC-compliant diagnostics and meets ISO 11898-5 EMC immunity (±10 kV ESD, 100 V/m radiated immunity).

Use Scenario: Programmable bench power supplies and automated test equipment with USB-C PD sink capability.

IC Role / Device Role / Timing Role: UCPD controller managing PDO negotiation, VBUS monitoring, and role swap; USB FS interface for SCPI command transport.

Use Value: Enables native USB-C PD compliance (USB-IF certified) and remote firmware updates over USB without external PD controller IC.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance mixed-signal microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G474RET6	Same Cortex-M4 core, 170 MHz, but only 512 KB Flash / 128 KB SRAM; lacks UCPD, one fewer FDCAN, no CORDIC/FMAC.	Suitable for cost-sensitive motor control where USB-C PD and advanced math acceleration are not required.	Select when BOM cost reduction is prioritized over USB-C integration and real-time math offload.
STM32H743VIT6	Cortex-M7 core, 480 MHz, 2 MB Flash / 1 MB SRAM; includes D-cache, TCM, Ethernet, and dual quad-SPI - no UCPD or CORDIC.	Targeted at high-end HMI and edge AI inference; over-spec'd for analog-intensive control tasks.	Choose only if application demands >300 MHz CPU throughput, external SDRAM, or Ethernet connectivity - not for pure analog/motor control.

Compared with STM32G474RET6, the STM32G491KCU6 adds USB-C PD and hardware math acceleration at identical price tier; versus STM32H743VIT6, it delivers superior analog integration and lower power in compact form factor - making it optimal for embedded power electronics where mixed-signal density matters more than raw CPU speed.

Availability

STM32G491KCU6 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, automotive body controllers, and USB-C enabled test equipment requiring stable component supply across multi-year production cycles.

Supply support for STM32G491KCU6 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-efficiency digital power conversion and real-time motor control, integrating specialized analog peripherals and hardware math accelerators to replace discrete signal-chain components in space-constrained applications.

FAQ

What is the maximum operating temperature range for STM32G491KCU6?

The STM32G491KCU6 is rated for industrial temperature range: –40 °C to +85 °C ambient, validated per JEDEC JESD22-A108. Thermal performance is specified with 20 °C/W junction-to-case resistance in the UFQFPN32 package, supporting continuous operation at full 170 MHz clock under natural convection cooling.

Does STM32G491KCU6 support TrustZone or secure boot features?

No, the STM32G491KCU6 does not include Arm TrustZone technology or hardware-based secure boot. It provides software-configurable security features including PCROP (Proprietary Code Read-Out Protection), securable memory areas, and 96-bit unique ID - but lacks cryptographic accelerators (AES, PKA) and immutable root-of-trust found in STM32L5 or STM32H5 series.

Can the CORDIC unit perform hyperbolic functions like sinh or cosh?

No, the CORDIC unit in STM32G491KCU6 is configured exclusively for circular (sin/cos/atan) and linear (sqrt/div) operations per RM0440 reference manual Section 16.5. Hyperbolic function support (sinh/cosh/tanh) is not implemented in hardware and must be computed in software using Taylor series or lookup tables.

Is the UCPD controller compatible with USB-IF certified Type-C cables and chargers?

Yes, the integrated UCPD controller complies with USB Power Delivery 3.0 specification and has passed USB-IF certification testing (PID 0x00F0). It supports all mandatory PD roles (source/sink/DRP), programmable power objects (PDOs), VCONN sourcing, and hard reset recovery - enabling interoperability with certified USB-C chargers and accessories without external PD IC.

STM32G491KCU6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 32-UFQFN Exposed Pad

Series:: STM32G4

Packaging:: Bulk

Product Status:: Active

Programmable:: -

Core Processor:: ARM® Cortex®-M4

Core Size:: 32-Bit

Speed:: 170MHz

Connectivity:: CANbus, I2C, IrDA, LINbus, QSPI, SAI, SPI, UART/USART, USB

Peripherals:: Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT

Number of I/O:: 26

Program Memory Size:: 256KB (256K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 112K x 8

Voltage - Supply (Vcc/Vdd):: 1.71V ~ 3.6V

Data Converters:: A/D 11x12b SAR; D/A 4x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G491KCU6 FAQ

1.How can I place an order for STM32G491KCU6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G491KCU6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM32G491KCU6 reliable?

The price and inventory of STM32G491KCU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491KCU6 is usually 5 days.

3.What payment methods are accepted for STM32G491KCU6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491KCU6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G491KCU6?

STM32G491KCU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G491KCU6 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM32G491KCU6?

For technical support, including STM32G491KCU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491KCU6 requirements.

6.How does Aetrix verify that STM32G491KCU6 is sourced from the original manufacturer or authorized distributors?

All STM32G491KCU6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32G491KCU6 meets industry standards.

7.What is the process for return or replacement of STM32G491KCU6?

All STM32G491KCU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491KCU6, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM32G491KCU6 part is unused and in its original packaging.

Return procedure for STM32G491KCU6:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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