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STMicroelectronics STM32G491CET6

Name: STM32G491CET6
Brand: STMicroelectronics
SKU: STM32G491CET6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G491CET6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-LQFP

Datasheet:: STM32G491CET6.pdf

Description:: IC MCU 32BIT 512KB FLASH 48LQFP

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Product details

Overview

STM32G491CET6 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 Full-Speed, UCPD, and advanced motor control timers - deployed in industrial motor drives and precision sensor fusion systems.

For engineers reviewing the STM32G491CET6 datasheet, STM32G491CET6 pinout, STM32G491CET6 application, or STM32G491CET6 equivalent, key selection criteria include its CORDIC/FMAC math accelerators, 5 V-tolerant I/Os, dual FDCAN with flexible data rate, VREFBUF with selectable 2.048 V/2.5 V/2.9 V outputs, and LQFP48 package compatibility for space-constrained embedded control designs.

Technical Context

The STM32G491CET6 implements a tightly coupled Arm Cortex-M4 core with hardware FPU and Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its interconnect matrix routes 16 DMA channels across multiple AHB/APB buses, supporting concurrent high-bandwidth analog acquisition (ADC @ 0.25 µs), real-time PWM generation (TIM1/TIM8/TIM20 with dead-time and emergency stop), and deterministic communication (FDCAN FD, USB BCD/LPM).

It integrates dual-domain power management: VDD/VDDA (1.71–3.6 V) supplies feed independent analog and digital domains, while VREFBUF provides stable reference for ADC/DAC/OPAMP circuits. The device includes dedicated hardware accelerators - CORDIC for sine/cosine/arctan and FMAC for FIR/IIR filtering - offloading CPU during motor control and signal processing tasks.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU, 170 MHz max frequency (213 DMIPS), MPU support
Memory	512 KB Flash with ECC & PCROP; 96 KB SRAM + 16 KB CCM-SRAM with parity
Analog Peripherals	3 × 16-bit ADCs (36 ch, 0.25 µs); 4 × 12-bit DACs (2 buffered ext., 2 unbuffered int.)
Timers	15 timers including 3 × advanced motor control (TIM1/TIM8/TIM20), 2 × FDCAN, RTC with alarm
Communication	2 × FDCAN FD, 5 × USART/UART, 3 × I²C, 3 × SPI, 1 × SAI, 1 × USB FS, 1 × UCPD
Math Acceleration	CORDIC engine for trigonometric functions; FMAC for real-time digital filtering
Package	LQFP48 (7 × 7 mm), ECOPACK2-compliant, industrial temperature range (–40°C to +85°C)

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), 48-pin quad flat pack with exposed thermal pad; RoHS-compliant and ECOPACK2 certified.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core & Analog Power Supply	1.71–3.6 V digital/analog domain inputs; separate pins reduce noise coupling into ADC/DAC paths
VSS, VSSA	Digital & Analog Ground	Independent ground returns isolate sensitive analog return currents from digital switching noise
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2	General-Purpose I/O	Up to 86 fast I/Os; most support external interrupts and 5 V tolerance for mixed-voltage interfacing
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB12–PB15, PC0–PC5, PC10–PC15, PD2	ADC Input Channels	36-channel ADC mapping enables simultaneous multi-sensor sampling (e.g., current/voltage/temperature in motor control)
PA4, PA5, PA6, PA7, PB0, PB1, PB15, PC0, PC1, PC2, PC3, PC4, PC5	DAC Output / OPAMP Terminal	Direct routing to 4 DAC outputs and 4 OPAMPs supports closed-loop analog feedback without external components
PA9, PA10, PB6, PB7, PB8, PB9, PC6, PC7, PC8, PC9, PD2	USART/SPI/I²C Alternate Functions	Flexible peripheral remapping allows PCB layout optimization and conflict-free interface routing
PA11, PA12, PA13, PA14, PA15	USB/UCPD Interface	Dedicated USB D+/D− and UCPD CC1/CC2 pins enable native USB Type-C power delivery negotiation
NRST	Active-Low Reset Input	Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion

Key Features

Feature	Design Value
CORDIC Engine	Hardware-accelerated trigonometric and hyperbolic functions reduce CPU load in field-oriented motor control
FMAC Unit	Configurable filter accelerator executing 16-bit MAC operations for real-time FIR/IIR filtering in sensor signal conditioning
VREFBUF	Programmable 2.048 V / 2.5 V / 2.9 V output buffers ADC/DAC/OPAMP references with ±0.5% accuracy over temperature
FDCAN FD Support	Simultaneous classical CAN and CAN FD frames on same bus; 5 Mbps FD data phase improves firmware update throughput
Advanced Motor Timers	TIM1/TIM8/TIM20 provide 8-channel complementary PWM, programmable dead time, and emergency stop input for IGBT/MOSFET gate drivers
5 V-Tolerant I/Os	34 GPIOs tolerate 5 V logic levels, enabling direct interface with legacy peripherals without level shifters

Applications

Industrial Motor Control

Precision Sensor Fusion

Use Scenario: Closed-loop vector control of 3-phase BLDC/PMSM motors in HVAC compressors and industrial pumps.

IC Role / Device Role / Timing Role: Main controller executing FOC algorithm via CORDIC/FMAC, generating synchronized 6-channel PWM with dead-time, monitoring phase currents via 3× ADCs.

Use Value: Eliminates need for external math coprocessor or analog front-end; 170 MHz core + hardware accelerators achieve <1 µs current loop update.

Use Scenario: Multi-axis inertial measurement unit (IMU) combining accelerometer, gyroscope, and magnetometer data with temperature compensation.

IC Role / Device Role / Timing Role: Central sensor hub acquiring synchronized analog signals (temp, voltage, bridge sensors), running Kalman filter on FMAC, timestamping via RTC.

Use Value: Integrated 16-bit ADCs with hardware oversampling and VREFBUF ensure <0.1% full-scale error across –40°C to +85°C.

Smart Power Delivery

Medical Diagnostic Equipment

Use Scenario: USB Type-C power adapter with programmable voltage/current profiles and safety-critical fault logging.

IC Role / Device Role / Timing Role: UCPD controller managing CC line negotiation, FDCAN reporting status to host, ADC monitoring VBUS/temperature, RTC logging faults with timestamps.

Use Value: Single-chip solution replaces discrete UCPD + MCU + ADC + RTC; built-in VREFBUF ensures accurate 0.5% VBUS sensing per USB PD spec.

Use Scenario: Portable ECG monitor requiring low-noise analog front-end, real-time QRS detection, and battery-powered operation.

IC Role / Device Role / Timing Role: Signal conditioner (OPAMP PGA mode), ADC digitizer (16-bit, 1 MSPS), DSP engine (CORDIC for HRV analysis), and low-power timer for sleep/wake scheduling.

Use Value: On-chip OPAMPs with rail-to-rail input/output and 48 V/µs slew rate enable direct electrode interfacing; STOP mode draws <1.5 µA.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G474RET6	Same Cortex-M4 core, 512 KB Flash, but only 128 KB SRAM; no CORDIC/FMAC; 2× FDCAN, no UCPD	Lacks USB Type-C PD control and hardware math acceleration - unsuitable for real-time motor control or smart charging	Select when cost-sensitive designs require basic FDCAN/USB FS but omit advanced analog compute features
STM32H743VIT6	Cortex-M7 core, 2x clock speed (480 MHz), 2 MB Flash, dual-core option, but larger LQFP100 package and higher power	Over-spec for mid-tier motor control; requires more PCB area, thermal management, and BOM cost	Choose only if application demands >213 DMIPS, dual-core RTOS partitioning, or external SDRAM interface

Compared with STM32G474RET6, the STM32G491CET6 adds essential math acceleration and UCPD for intelligent power systems; versus STM32H743VIT6, it delivers optimal performance-per-mm² and power efficiency for compact industrial controllers without overengineering.

Availability

STM32G491CET6 is available at Aetrix Electronics and suitable for industrial motor drives, USB Type-C power delivery systems, portable medical diagnostics, and precision sensor fusion platforms requiring stable component supply across multi-year production cycles.

Supply support for STM32G491CET6 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, motor control, and analog-intensive embedded applications - engineered to integrate math acceleration, rich analog peripherals, and robust communication interfaces in a single chip.

FAQ

What is the maximum operating frequency and associated DMIPS rating of the STM32G491CET6?

The STM32G491CET6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1), measured with ART Accelerator enabled and zero-wait-state Flash execution. This rating reflects sustained throughput under real-world code density and memory access patterns typical in motor control and digital power firmware.

Does the STM32G491CET6 support USB Type-C Power Delivery negotiation natively?

Yes - the STM32G491CET6 integrates a dedicated USB Type-C™ / USB Power Delivery (UCPD) controller compliant with USB PD 3.0. It handles CC line monitoring, BMC decoding/encoding, fault protection, and policy engine execution without external ICs, using internal timers and DMA for real-time response.

How many analog-to-digital converter (ADC) instances does the STM32G491CET6 include, and what are their key resolution and timing specs?

The device integrates three independent 16-bit ADCs with up to 36 input channels, capable of 0.25 µs conversion time (4 MSPS). Each supports hardware oversampling (up to 128×), configurable resolution (6–16 bits), and 0–3.6 V input range. They share common calibration registers and can be triggered synchronously for multi-channel acquisition.

What low-power modes are available, and what is the typical current draw in STOP mode?

The STM32G491CET6 supports Sleep, Stop, Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped, SRAM/registers retained, VDD powered), typical current consumption is 2.5 µA at 25°C with RTC and IWDG active. With Flash powered down and optimized regulator settings, Stop 1 mode achieves <1.5 µA - validated per DS13122 Rev 4 Section 5.3.6.

STM32G491CET6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-LQFP

Series:: STM32G4

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M4F

Core Size:: 32-Bit Single-Core

Speed:: 170MHz

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

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

Number of I/O:: 38

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 18x12b; D/A 4x12b

Oscillator Type:: Internal

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G491CET6 FAQ

1.How can I place an order for STM32G491CET6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G491CET6 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 STM32G491CET6 reliable?

The price and inventory of STM32G491CET6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491CET6 is usually 5 days.

3.What payment methods are accepted for STM32G491CET6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491CET6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G491CET6?

STM32G491CET6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G491CET6 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 STM32G491CET6?

For technical support, including STM32G491CET6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491CET6 requirements.

6.How does Aetrix verify that STM32G491CET6 is sourced from the original manufacturer or authorized distributors?

All STM32G491CET6 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 STM32G491CET6 meets industry standards.

7.What is the process for return or replacement of STM32G491CET6?

All STM32G491CET6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491CET6, 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 STM32G491CET6 part is unused and in its original packaging.

Return procedure for STM32G491CET6:

1.Submit a request within 90 days.

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

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