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STMicroelectronics STM32G491REI6
- Part No.:
- STM32G491REI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32G491REI6.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
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Product details
Overview
STM32G491REI6 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 industrial motor control and precision sensor interface applications.
For engineers reviewing the STM32G491REI6 datasheet, STM32G491REI6 pinout, STM32G491REI6 application, or STM32G491REI6 equivalent, key selection considerations include its dual FDCAN support for automotive-grade communication, CORDIC/FMAC hardware accelerators for real-time math, UCPD controller for USB Type-C™ power delivery, and 5 V-tolerant GPIOs enabling direct interfacing with legacy logic.
Technical Context
The STM32G491REI6 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 DSP instruction set for deterministic embedded control. Its analog subsystem integrates 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 with full terminal access.
Timing and connectivity are handled by 15 timers-including three 16-bit advanced motor-control timers with dead-time generation and emergency stop-and dual FDCAN controllers supporting flexible data-rate (up to 5 Mbps). The device includes a USB 2.0 full-speed interface with LPM/BCD, SAI, IRTIM, and a dedicated UCPD peripheral for USB Power Delivery negotiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm® Cortex®-M4 with FPU, 170 MHz max, 213 DMIPS - enables real-time signal processing and floating-point control loops without external coprocessor. |
| Memory | 512 KB Flash (ECC, PCROP), 112 KB SRAM (96 KB + 16 KB CCM-SRAM with parity) - supports secure firmware storage and deterministic low-latency data buffering. |
| Analog Peripherals | 3 × 16-bit ADCs (0.25 µs, 36 ch), 4 × 12-bit DACs (2 ext. buffered @ 1 MSPS), 4 × op-amps (PGA mode), 4 × comparators - enables high-fidelity sensor acquisition and closed-loop analog actuation. |
| Math Acceleration | CORDIC (trig/log/exp), FMAC (filtering) - offloads >90% of common motor control and sensor fusion math from CPU, reducing latency and jitter. |
| Communication | 2 × FDCAN (flexible data rate), 5 × USART/UART, 3 × I²C (1 Mbit/s), 3 × SPI, USB FS, SAI, UCPD - supports mixed-criticality networks (e.g., CAN for safety, USB for configuration, I²C for sensors). |
| Power & Timing | VDD/VDDA: 1.71–3.6 V; 4–48 MHz crystal oscillator; 32 kHz calibrated RTC; low-power modes (Stop 0/1, Standby) - enables battery-backed operation and energy-constrained edge nodes. |
| Package & Pin Count | UFQFPN48 (7 × 7 mm, 0.5 mm pitch), 48-pin layout with 38 fast I/Os (5 V tolerant on selected pins) - balances board space, thermal performance, and routing simplicity for compact industrial PCBs. |
Pinout & Package
STM32G491REI6 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 and exposed thermal pad. This RoHS-compliant, ECOPACK2-qualified package supports reflow soldering and delivers efficient thermal dissipation for sustained 170 MHz operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & Analog Supply | 1.71–3.6 V input; separate analog domain ensures clean reference for ADC/DAC/OPAMP operation. |
| VSS, VSSA | Digital & Analog Ground | Separate ground planes reduce coupling noise between digital switching and sensitive analog circuits. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1 | General-Purpose I/O | 38 total GPIOs; up to 22 support 5 V tolerance - simplifies level-shifting with industrial 5 V peripherals. |
| NRST | Active-Low Reset | Asynchronous reset input with internal pull-up; compatible with external push-button or supervisor ICs. |
| BOOT0 | Boot Mode Selection | High at power-on selects system memory bootloader; enables field firmware recovery without debugger. |
| SWCLK, SWDIO | Debug Interface | 2-pin Serial Wire Debug (SWD) - minimal footprint debug access for production programming and runtime diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC + FMAC accelerators | Hardware trigonometric and filtering compute units - eliminate software library overhead and jitter in motor FOC or sensor fusion. |
| Triple 16-bit ADC with interleaving | Simultaneous sampling across 3 ADCs with hardware synchronization - enables precise phase current measurement in 3-phase inverters. |
| Dual FDCAN with FD support | Up to 5 Mbps data rate, ISO 11898-1 compliant - meets automotive and industrial CAN FD requirements for high-bandwidth diagnostics and control. |
| UCPD peripheral | Dedicated USB Type-C™ Power Delivery controller with CC line monitoring - enables autonomous port power role negotiation without host CPU involvement. |
| Routine Booster (CCM-SRAM) | 16 KB tightly coupled SRAM with parity on instruction/data bus - guarantees zero-wait-state execution of time-critical ISR and control algorithms. |
Applications
| Industrial Motor Control | Precision Sensor Hub |
|---|---|
Use Scenario: Closed-loop field-oriented control (FOC) of BLDC/PMSM motors in HVAC blowers and pump drives. IC Role / Device Role / Timing Role: Main controller executing PWM generation, current sensing, position estimation, and safety monitoring in <1 µs interrupt latency. Use Value: Integrated triple ADCs with hardware trigger synchronization and CORDIC-based Clarke/Park transforms enable real-time torque control without external math ICs. |
Use Scenario: Multi-sensor fusion node aggregating temperature, pressure, and IMU data for predictive maintenance in factory equipment. IC Role / Device Role / Timing Role: Central acquisition engine performing oversampled ADC reads, PGA gain adjustment, and timestamped data packaging for edge AI inference. Use Value: Four op-amps in PGA mode condition diverse sensor outputs; FMAC accelerates FIR filtering of vibration signals before transmission via UART or USB. |
| USB-C Power Delivery Endpoint | Smart Grid Communication Node |
Use Scenario: USB-C powered industrial dock with dynamic power allocation across multiple peripherals. IC Role / Device Role / Timing Role: UCPD controller managing CC line negotiation, VBUS monitoring, and policy engine execution independent of main application core. Use Value: Dedicated UCPD hardware handles USB PD 3.0 messaging and fault response in <100 µs - ensures compliance without CPU scheduling interference. |
Use Scenario: DIN-rail mounted metering gateway communicating over FDCAN to smart meters and via LPUART to cellular modems. IC Role / Device Role / Timing Role: Dual-FDCAN interface coordinator with RTC-triggered data logging and low-power wake-on-event for battery backup operation. Use Value: Stop-mode current <1.5 µA with RTC active enables >5-year battery life; FDCAN FD supports firmware updates over legacy CAN infrastructure. |
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, no CORDIC/FMAC - lacks USB-C PD and hardware math acceleration. | Suitable for cost-sensitive motor control where USB-C PD and real-time trig functions are unnecessary. | Select when UCPD and CORDIC are not required; lower BOM cost but reduced feature headroom. |
| STM32H743VIT6 | Higher-tier dual-core (Cortex-M7/M4), 2 MB Flash, 1 MB RAM, no UCPD, no CORDIC - targets high-throughput apps, not USB-C endpoint roles. | Used in complex HMI or gateway applications requiring Linux co-processing or Ethernet, not embedded USB-C endpoints. | Choose only if >200 MHz performance, large memory, or dual-core isolation is mandatory - overkill for standalone FDCAN/UCPD nodes. |
Compared with STM32G474RET6, the STM32G491REI6 adds UCPD and CORDIC/FMAC for USB-C PD and deterministic math; versus STM32H743VIT6, it trades raw throughput for targeted analog+power-delivery integration in compact 48-pin form factor.
Availability
STM32G491REI6 is available at Aetrix Electronics and suitable for industrial motor control, precision sensor interface, USB-C power delivery endpoints, and smart grid communication nodes requiring stable component supply across multi-year production cycles.
Supply support for STM32G491REI6 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, specializing in microcontrollers, power management, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.
The STM32G4 series targets high-performance, analog-rich embedded applications - designed specifically for digital power conversion, motor control, and USB-C endpoint systems demanding real-time math, rich peripherals, and robust security.
FAQ
What is the maximum operating frequency and associated DMIPS rating of the STM32G491REI6?
The STM32G491REI6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1), verified under conditions of ART Accelerator enabled and zero-wait-state Flash execution. This rating reflects sustained throughput for real-time control tasks, not peak burst performance.
Does the STM32G491REI6 support USB Type-C™ Power Delivery negotiation without external components?
Yes - the integrated UCPD (USB-C Power Delivery) peripheral provides complete hardware-level handling of CC line monitoring, BMC decoding, policy engine execution, and VBUS discharge control. No external transceivers or PD controllers are required for basic USB-C sink/source negotiation per USB PD 3.0 specification.
How many analog-to-digital converters does the STM32G491REI6 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) across up to 36 channels total. Hardware oversampling supports effective resolution up to 16 bits at lower rates, and all ADCs support simultaneous sampling triggered by advanced timers for synchronized multi-channel acquisition.
What low-power modes are supported, and what is the typical current consumption in Stop 0 mode?
The STM32G491REI6 supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped, SRAM/registers retained, RTC running), typical current consumption is 1.4 µA at 25°C with VDD = 3.3 V - measured with Flash and SRAM in retention, enabling rapid wake-up (<5 µs) while preserving full context.
STM32G491REI6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA
- 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:
- 52
- 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 24x12b; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G491REI6 FAQ
1.How can I place an order for STM32G491REI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G491REI6 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 STM32G491REI6 reliable?
The price and inventory of STM32G491REI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491REI6 is usually 5 days.
3.What payment methods are accepted for STM32G491REI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491REI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G491REI6?
STM32G491REI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G491REI6 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 STM32G491REI6?
For technical support, including STM32G491REI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491REI6 requirements.
6.How does Aetrix verify that STM32G491REI6 is sourced from the original manufacturer or authorized distributors?
All STM32G491REI6 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 STM32G491REI6 meets industry standards.
7.What is the process for return or replacement of STM32G491REI6?
All STM32G491REI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491REI6, 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 STM32G491REI6 part is unused and in its original packaging.
Return procedure for STM32G491REI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G491REI6 Tags
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