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STMicroelectronics STM32G491CEU6TR

Name: STM32G491CEU6TR
Brand: STMicroelectronics
SKU: STM32G491CEU6TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G491CEU6TR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-UFQFN Exposed Pad

Datasheet:: STM32G491CEU6TR.pdf

Description:: IC MCU 32BIT 512KB FLSH 48UFQFPN

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Product details

Overview

STM32G491CEU6TR 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 targets motor control, digital power conversion, and industrial sensing applications requiring real-time math acceleration via CORDIC and FMAC units.

For engineers reviewing the STM32G491CEU6TR datasheet, STM32G491CEU6TR pinout, STM32G491CEU6TR application, or STM32G491CEU6TR equivalent, key selection criteria include its 48-pin UFQFPN package, dual FDCAN support for automotive-grade communication, hardware-based trigonometric and filtering acceleration, and 5 V-tolerant GPIOs enabling direct interface with legacy logic systems.

Technical Context

The device implements a tightly coupled interconnect matrix supporting concurrent access to flash, SRAM, and peripherals, with ART Accelerator enabling zero-wait-state execution at 170 MHz. Its memory subsystem includes 512 KB Flash with PCROP and ECC, 96 KB SRAM with parity on first 32 KB, and 16 KB CCM SRAM with parity-optimized for deterministic real-time code/data execution.

Analog integration centers on three independent 16-bit ADCs (0.25 µs conversion, up to 36 channels), four 12-bit DACs (2 buffered external @ 1 MSPS, 2 unbuffered internal @ 15 MSPS), and four op-amps configurable as programmable-gain amplifiers (PGA) with all terminals accessible-enabling sensor signal conditioning and closed-loop control without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU, 170 MHz max frequency → enables real-time DSP and control algorithms with IEEE 754-compliant floating-point math.
Flash Memory	512 KB with ECC and PCROP → ensures firmware integrity and secure code protection against readout attacks.
SRAM	112 KB total: 96 KB main SRAM (32 KB with hardware parity), 16 KB CCM SRAM (parity-checked) → supports safety-critical data buffers and deterministic interrupt handling.
Analog Peripherals	3 × 16-bit ADCs (0.25 µs), 4 × 12-bit DACs, 4 × op-amps (PGA mode), 4 × comparators → enables full-signal-chain processing (sensing → conditioning → conversion → actuation) on-chip.
Communication	2 × FDCAN (flexible data-rate), 5 × USART/UART, 3 × I²C, 3 × SPI, USB FS, UCPD → supports automotive CAN FD networks, industrial serial protocols, and USB-C power delivery negotiation.
Math Acceleration	CORDIC (trigonometric/hyperbolic functions) and FMAC (filtering operations) → offloads CPU for motor control (FOC), digital power (PFC, LLC), and sensor fusion tasks.
Package	UFQFPN48 (7 × 7 mm, 0.5 mm pitch) → compact footprint suitable for space-constrained industrial and consumer power electronics.

Pinout & Package

STM32G491CEU6TR 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 is ECOPACK2-compliant and features exposed thermal pad for enhanced heat dissipation in high-duty-cycle applications.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core and analog supply inputs	Accept 1.71–3.6 V; separate VDDA enables clean analog reference for ADC/DAC/OPAMP operation.
VSS, VSSA	Digital and analog ground returns	Independent grounding reduces noise coupling between digital switching and precision analog circuits.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15	General-purpose I/Os	Up to 86 fast I/Os; multiple pins support 5 V tolerance, critical for interfacing with 5 V logic or sensors without level shifters.
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB12–PB15, PC0–PC5, PC10–PC15, PD2, PE0–PE15	ADC input channels	Support up to 36 single-ended or 18 differential ADC inputs across three independent 16-bit converters.
PA4, PA5, PA6, PA7, PB0, PB1, PB15, PC0–PC2, PC4, PC5	DAC output channels	Four 12-bit DAC outputs: two buffered (PA4/PA5) for external load driving, two unbuffered (PA6/PA7) for internal feedback loops.
PA0, PA1, PA2, PA3, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC5, PC10–PC13	Comparator inputs	Four ultra-fast rail-to-rail comparators with programmable hysteresis, used for overvoltage/overcurrent protection and zero-crossing detection.
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB12, PB13, PB14, PB15, PC0–PC5, PC10–PC15, PD2, PE0–PE15	Op-amp inputs/outputs	Four fully accessible op-amps usable in PGA mode (gain 1–16) for sensor front-end amplification or active filtering.
PA11, PA12, PB9, PB10, PB12–PB13, PC1, PC10–PC11, PD0–PD1, PE2–PE5	FDCAN, USART, I²C, SPI, USB signals	Dual FDCAN transceivers (CANH/CANL), USB D+/D−, and multiple UART/I²C/SPI interfaces enable mixed-protocol system integration.

Key Features

Feature	Design Value
CORDIC accelerator	Hardware computation of sin/cos/tan/log/exp/sqrt → reduces CPU load by >90% for motor FOC angle calculation and sensor linearization.
FMAC unit	Real-time FIR/IIR filter execution → enables adaptive digital power control (e.g., resonant LLC regulation) without software overhead.
VREFBUF	Programmable 2.048 V / 2.5 V / 2.9 V internal reference → eliminates external voltage reference ICs for ADC/DAC calibration and precision measurement.
Advanced motor timers	Three 16-bit advanced-control timers (TIM1/TIM8/TIM20) with dead-time generation and emergency stop → supports 3-phase BLDC/PMSM drives with hardware fault response < 100 ns.
UCPD controller	Integrated USB Type-C™ and Power Delivery negotiation engine → enables bidirectional power negotiation (up to 100 W) and role swapping without external PD controller IC.

Applications

Industrial Motor Control

Digital Power Supply

Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase BLDC motors in HVAC compressors and industrial pumps.

IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm (Park/Clarke transforms, PI regulators), PWM generation with sub-microsecond dead-time control, and current/voltage sensing via integrated ADCs/DACs.

Use Value: Eliminates external math coprocessor and gate-driver interface logic; CORDIC/FMAC reduce control loop latency to < 1 µs.

Use Scenario: Digital control of resonant LLC and active PFC stages in server PSUs and telecom rectifiers.

IC Role / Device Role / Timing Role: High-frequency PWM generation (up to 10 MHz effective resolution), adaptive compensation via FMAC, and isolated voltage/current feedback acquisition.

Use Value: Replaces dual-controller architectures; integrated op-amps condition shunt signals directly, reducing BOM count by 4–6 passive components per channel.

Automotive Body Electronics

Smart Sensor Hub

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

IC Role / Device Role / Timing Role: Dual FDCAN interface for LIN/CAN gateway functionality, robust 5 V-tolerant I/Os for switch/sensor inputs, and watchdog timers for ASIL-B compliance.

Use Value: Single-chip replacement for discrete CAN transceiver + MCU + analog front-end; meets ISO 11898-1:2015 FDCAN timing requirements.

Use Scenario: Multi-sensor fusion node aggregating temperature, pressure, humidity, and IMU data for predictive maintenance in factory equipment.

IC Role / Device Role / Timing Role: Simultaneous sampling of 12+ analog sensors via three ADCs, on-chip filtering (FMAC), and secure data packaging for BLE/Wi-Fi transmission.

Use Value: Reduces external ADC multiplexing and FPGA preprocessing; 96-bit unique ID and RNG enable device-level cryptographic key binding.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G474RET6	Same G4 series, but 512 KB Flash, 128 KB SRAM, no UCPD or second FDCAN; lacks CORDIC/FMAC accelerators.	Suitable for cost-sensitive motor control where USB-C PD or dual CAN FD is unnecessary.	Select when math acceleration and USB-C power negotiation are not required; lower BOM cost but reduced feature headroom.
STM32H743VIT6	Higher-tier Cortex-M7 (480 MHz), 2 MB Flash, 1 MB RAM, dual-core option, but larger LQFP100 package and higher power consumption.	Targeted at complex HMI + control co-processing, not compact embedded power electronics.	Choose only if >200 MHz performance, large memory footprint, or dual-core RTOS partitioning is mandatory; overkill for G4-class applications.

Compared with STM32G474RET6, STM32G491CEU6TR adds hardware math acceleration and dual FDCAN for deterministic real-time control; versus STM32H743VIT6, it delivers optimized analog integration and lower power in a smaller 7×7 mm package-making it superior for space- and efficiency-constrained digital power and motor drive designs.

Availability

STM32G491CEU6TR is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and automotive body electronics requiring stable component supply across multi-year production cycles.

Supply support for STM32G491CEU6TR 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 and precision motor control applications, integrating specialized math accelerators, rich analog peripherals, and automotive-grade communication interfaces into a single low-power MCU platform.

FAQ

What is the maximum operating frequency and associated DMIPS rating?

The STM32G491CEU6TR 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) for zero-wait-state flash execution and includes full DSP instruction support and single-precision floating-point unit (FPU) compliant with IEEE 754.

Does this MCU support hardware-based cryptographic functions?

No, the STM32G491CEU6TR does not integrate dedicated cryptographic accelerators (AES, SHA, PKA). It includes a true random number generator (RNG) and 96-bit unique ID for key derivation, but encryption/decryption must be implemented in software or via external secure elements. For hardware crypto, consider STM32L5 or STM32U5 series.

What are the supported low-power modes and typical current draw in Stop 0 mode?

It supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped, SRAM/registers retained, VDD/VDDA powered), typical current consumption is 2.3 µA at 25 °C (with RTC and IWDG running), per DS13122 Rev 4 Section 5.3.29. Wake-up time from Stop 0 is ≤5 µs.

Is the UFQFPN48 package RoHS and REACH compliant?

Yes, the UFQFPN48 package for STM32G491CEU6TR is ECOPACK2-compliant, meeting both RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 requirements. Lead-free matte tin finish and halogen-free molding compound are standard; full compliance documentation is available in ST's official material declarations.

STM32G491CEU6TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-UFQFN Exposed Pad

Series:: STM32G4

Packaging:: Tape & Reel (TR)

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:: 42

Program Memory Size:: 512KB (512K 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 19x12b SAR; D/A 4x12b

Oscillator Type:: Internal

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G491CEU6TR FAQ

1.How can I place an order for STM32G491CEU6TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G491CEU6TR 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 STM32G491CEU6TR reliable?

The price and inventory of STM32G491CEU6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491CEU6TR is usually 5 days.

3.What payment methods are accepted for STM32G491CEU6TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491CEU6TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G491CEU6TR?

STM32G491CEU6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G491CEU6TR 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 STM32G491CEU6TR?

For technical support, including STM32G491CEU6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491CEU6TR requirements.

6.How does Aetrix verify that STM32G491CEU6TR is sourced from the original manufacturer or authorized distributors?

All STM32G491CEU6TR 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 STM32G491CEU6TR meets industry standards.

7.What is the process for return or replacement of STM32G491CEU6TR?

All STM32G491CEU6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491CEU6TR, 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 STM32G491CEU6TR part is unused and in its original packaging.

Return procedure for STM32G491CEU6TR:

1.Submit a request within 90 days.

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

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