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STMicroelectronics STM32G491CEU6

Name: STM32G491CEU6
Brand: STMicroelectronics
SKU: STM32G491CEU6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G491CEU6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-UFQFN Exposed Pad

Datasheet:: STM32G491CEU6.pdf

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

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Product details

Overview

STM32G491CEU6 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 STM32G491CEU6 datasheet, STM32G491CEU6 pinout, STM32G491CEU6 application, or STM32G491CEU6 equivalent, key selection criteria include its 48-pin UFQFPN package, dual FDCAN support for automotive-grade communication, hardware-accelerated trigonometric and filtering functions, and 5 V-tolerant I/Os enabling direct interfacing with legacy logic levels.

Technical Context

The STM32G491CEU6 implements an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 170 MHz, paired with a memory protection unit (MPU) and securable memory regions including PCROP and 1 KB OTP. Its interconnect matrix routes 16 DMA channels across multiple AHB/APB buses for concurrent peripheral access without arbitration bottlenecks.

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, UCPD for USB Type-C™ power delivery negotiation, and a dedicated low-power timer (LPTIM1) with ultra-low wake-up latency from Stop modes - all synchronized via a flexible clock tree supporting four oscillators (HSE, LSE, HSI, LSI) and PLL configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU and DSP instructions, enabling single-cycle MAC and saturating arithmetic for real-time control loops.
Max Clock Frequency	170 MHz with 213 DMIPS performance, sustained via ART Accelerator eliminating Flash wait states.
Memory	512 KB Flash (ECC-protected, PCROP-enabled), 96 KB SRAM + 16 KB CCM-SRAM (parity-checked), supporting deterministic code/data placement.
Analog Peripherals	3 × 16-bit ADCs (0.25 µs conversion, hardware oversampling), 4 × 12-bit DACs (2 buffered external @ 1 MSPS, 2 unbuffered internal @ 15 MSPS).
Timers	15 timers including 3 advanced motor-control timers (TIM1/TIM8/TIM20) with dead-time generation, emergency stop, and quadrature encoder input.
Communication	2 × FDCAN, 5 × USART/UART (with LIN/IrDA), 3 × I²C (Fast Mode Plus), 3 × SPI, 1 × SAI, USB FS, and UCPD for USB-C PD negotiation.
Math Acceleration	CORDIC engine for sin/cos/tan/log/exp and FMAC for FIR/IIR filter coefficient computation - offloading CPU in motor and power apps.
Package & Pins	UFQFPN48 (7 × 7 mm, 0.5 mm pitch), 44 GPIOs (39 5 V-tolerant), supporting mappable EXTI and high-speed analog routing.

Pinout & Package

STM32G491CEU6 uses the UFQFPN48 (7 × 7 mm, 0.5 mm pitch) package, RoHS-compliant and ECOPACK2 certified, optimized for space-constrained industrial and motor control PCBs.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core & analog supply	1.71–3.6 V operation; separate VDDA enables clean analog reference for ADC/DAC/OPAMP.
VSS, VSSA	Digital & analog ground	Independent grounding reduces noise coupling between digital switching and precision analog circuits.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1	General-purpose I/O	44 GPIOs; 39 support 5 V tolerance, allowing direct interface with 5 V logic without level shifters.
NRST	Active-low reset	Asynchronous reset input with internal pull-up; compatible with external push-button or supervisor IC assertion.
BOOT0	Boot mode select	Configures boot source (system memory, embedded Flash, or SRAM) on power-up or reset.
OSC_IN / OSC_OUT	HSE crystal interface	Supports 4–48 MHz external crystal for precise timing; essential for USB, CAN, and RTC accuracy.
VBAT	RTC backup supply	Enables calendar RTC and 32 backup registers during main power loss using coin-cell or supercap.
UCPD1_DB, UCPD1_CC1/CC2	USB-C PD controller I/O	Dedicated pins for USB Type-C CC line monitoring and BMC communication with PD controllers.

Key Features

Feature	Design Value
CORDIC accelerator	Hardware trigonometric/logarithmic computation in <100 ns, eliminating software library overhead in motor FOC and sensor fusion.
FMAC unit	Single-cycle filter coefficient update for 2nd-order IIR/FIR, enabling real-time adaptive filtering in digital power supplies.
Triple ADC interleaving	Simultaneous sampling across 3 ADCs with hardware synchronization, critical for three-phase current/voltage acquisition in inverters.
Advanced timers with dead time	TIM1/TIM8/TIM20 provide programmable dead-time insertion (1–1023 ns resolution) and fault input handling for safe gate driver control.
VREFBUF output options	Programmable 2.048 V / 2.5 V / 2.9 V reference for ADC/DAC calibration and OPAMP gain setting, reducing external component count.
FDCAN FD support	Flexible Data-Rate up to 5 Mbps with payload up to 64 bytes, enabling high-bandwidth diagnostics and firmware updates over CAN bus.

Applications

Industrial Motor Control

Digital Power Supply

Use Scenario: Field-oriented control (FOC) of 3-phase BLDC/PMSM motors in HVAC compressors and industrial drives.

IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm (Park/Clarke transforms, PI regulators), PWM generation with sub-100 ns dead-time control, and simultaneous current sensing via triple ADC.

Use Value: CORDIC and FMAC reduce CPU load by >40%, enabling 20 kHz PWM carrier frequency while maintaining 10 kHz control loop bandwidth.

Use Scenario: Isolated AC/DC and DC/DC converters with digital voltage/current regulation and protection.

IC Role / Device Role / Timing Role: Closed-loop regulation using hardware-accelerated PID, synchronous rectification timing, and fast overcurrent response via analog comparator-triggered emergency shutdown.

Use Value: Four independent OPAMPs configured as PGAs enable direct current-sense amplification; dual FDCAN supports remote monitoring and firmware updates without disrupting power stage.

Smart Grid Sensor Node

USB-C Power Delivery Hub

Use Scenario: Compact, battery-backed metering node measuring voltage, current, harmonics, and temperature in distribution panels.

IC Role / Device Role / Timing Role: High-precision analog front-end (16-bit ADC, VREFBUF, temp sensor), RTC with alarm wakeup, and low-power Stop mode operation (<1.5 µA).

Use Value: 112 KB SRAM retains full measurement buffers during deep sleep; LPTIM1 triggers periodic ADC sampling without CPU wake-up.

Use Scenario: Multi-port USB-C hub negotiating power contracts (up to 100 W), managing CC line state, and implementing policy engine.

IC Role / Device Role / Timing Role: Dedicated UCPD peripheral handles BMC physical layer, Type-C state machine, and PD protocol stack offload from main application core.

Use Value: Integrated UCPD eliminates need for external PD controller IC, reducing BOM cost and PCB area while supporting USB PD 3.0 with PPS.

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 G4 series, but 512 KB Flash, 128 KB SRAM, no CORDIC/FMAC, only 2 ADCs, no UCPD.	Lacks hardware math acceleration and USB-C PD capability; suitable for cost-sensitive motor control without FOC or PD requirements.	Select when UCPD, CORDIC, or triple ADC concurrency is not required - lower BOM cost and simpler layout.
STM32H743VIT6	Cortex-M7 core @ 480 MHz, 2 MB Flash, 1 MB RAM, dual-core option, no CORDIC/FMAC, higher power consumption.	Targeted at high-throughput applications (e.g., industrial HMI, vision preprocessing); lacks analog integration density and low-power features of G4.	Choose for raw processing throughput and large memory footprint where analog integration and sub-µA Stop modes are secondary.

Compared with STM32G474RET6, the STM32G491CEU6 adds deterministic math acceleration and USB-C PD control at identical package size; versus STM32H743VIT6, it delivers superior analog integration and energy efficiency per MHz in resource-constrained edge nodes.

Availability

STM32G491CEU6 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, smart grid sensors, and USB-C PD hubs requiring stable component supply, long-term manufacturability, and qualified automotive-grade variants (where applicable).

Supply support for STM32G491CEU6 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 and reduce system-level complexity.

FAQ

What is the maximum operating temperature range for STM32G491CEU6?

The STM32G491CEU6 is specified for industrial temperature range: –40 °C to +85 °C ambient, validated per JEDEC JESD47 stress testing. Thermal derating begins above 70 °C ambient when operating at 170 MHz with full peripheral activation; junction temperature must remain below 125 °C under all conditions.

Does STM32G491CEU6 support secure boot and firmware encryption?

Yes - it includes proprietary code readout protection (PCROP), securable memory areas, and hardware AES-256 encryption engine. Secure boot is implemented via ROM-based bootloader verifying signed firmware images stored in Flash, with public key stored in one-time-programmable (OTP) memory.

Can the four operational amplifiers be used in instrumentation amplifier configuration?

Yes - all four OPAMPs expose both inputs and outputs externally, enabling user-defined configurations including 3-opamp instrumentation amplifiers. Gain can be set via external resistors; internal PGA mode supports gains of 1, 2, 4, 8, 16, and 32 with rail-to-rail output swing.

Is the UFQFPN48 package of STM32G491CEU6 compatible with reflow soldering per IPC-J-STD-020?

Yes - the UFQFPN48 (A0B9 package variant) is qualified for standard lead-free reflow per IPC-J-STD-020D, with peak temperature of 260 °C for ≤30 seconds. Moisture sensitivity level (MSL) is 3, requiring bake-out if exposed to ambient >12 months after seal opening.

STM32G491CEU6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-UFQFN Exposed Pad

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:: 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; D/A 4x12b

Oscillator Type:: Internal

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G491CEU6 FAQ

1.How can I place an order for STM32G491CEU6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G491CEU6 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 STM32G491CEU6 reliable?

The price and inventory of STM32G491CEU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491CEU6 is usually 5 days.

3.What payment methods are accepted for STM32G491CEU6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491CEU6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G491CEU6?

STM32G491CEU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G491CEU6 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 STM32G491CEU6?

For technical support, including STM32G491CEU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491CEU6 requirements.

6.How does Aetrix verify that STM32G491CEU6 is sourced from the original manufacturer or authorized distributors?

All STM32G491CEU6 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 STM32G491CEU6 meets industry standards.

7.What is the process for return or replacement of STM32G491CEU6?

All STM32G491CEU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491CEU6, 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 STM32G491CEU6 part is unused and in its original packaging.

Return procedure for STM32G491CEU6:

1.Submit a request within 90 days.

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

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