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STMicroelectronics STM32G491RCT3TR
- Part No.:
- STM32G491RCT3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32G491RCT3TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,668
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Product details
Overview
STM32G491RCT3TR 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 - deployed in motor control, industrial sensing, and power conversion systems.
For engineers reviewing the STM32G491RCT3TR datasheet, STM32G491RCT3TR pinout, STM32G491RCT3TR application, or STM32G491RCT3TR equivalent, key selection considerations include its dual FDCAN support, CORDIC/FMAC math accelerators, UCPD interface for USB Type-C™ PD, 5 V-tolerant I/Os, and LQFP64 package with 51 GPIOs - critical for real-time embedded control with mixed-signal precision.
Technical Context
The device 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. It integrates dual FDCAN controllers compliant with ISO 11898-1:2015 for flexible data-rate automotive and industrial networking.
Analog subsystem includes 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 full terminal access - supporting closed-loop control and sensor signal conditioning without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 170 MHz max, 213 DMIPS - enables real-time DSP and control algorithms without offloading. |
| Memory | 512 KB Flash (ECC, PCROP), 96 KB SRAM + 16 KB CCM SRAM - supports secure firmware storage and deterministic low-latency data buffering. |
| Analog Peripherals | 3× 16-bit ADCs (0.25 µs), 4× 12-bit DACs, 4× op-amps (PGA mode), 4× comparators - enables high-fidelity sensor acquisition and actuator drive in single-chip motor control. |
| Math Acceleration | CORDIC (trig/log/exp), FMAC (filtering) - reduces CPU load for motor FOC, digital power supply control, and sensor fusion. |
| Communication | 2× FDCAN, 5× USART/UART, 3× SPI, 3× I²C, USB FS, SAI, UCPD - supports multi-protocol industrial gateways and USB-C PD sink applications. |
| Package & I/O | LQFP64 (10 × 10 mm), 51 GPIOs (47 5 V-tolerant) - provides compact footprint with robust interfacing for industrial PCB layouts. |
| Power Management | VDD/VDDA: 1.71–3.6 V; low-power modes (Stop/Standby/Shutdown); VBAT RTC backup - ensures operation across wide input rails and battery-backed timekeeping. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply | Separate 1.71–3.6 V domains enable noise-isolated analog performance and stable digital operation. |
| VSS, VSSA | Digital & analog ground | Independent ground pins reduce coupling between digital switching noise and precision analog circuits. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE1 | General-purpose I/O | 51 GPIOs with interrupt capability; 47 support 5 V tolerance - simplifies level-shifting in mixed-voltage systems. |
| NRST | Active-low reset | Asynchronous reset input with internal pull-up; compatible with external reset supervisors and push-button recovery. |
| BOOT0 | Boot mode select | Configures boot source (system memory, Flash, or SRAM) at power-on - essential for bootloader and field firmware updates. |
| PA11/PA12 | USB D+/D− | Dedicated full-speed USB 2.0 transceivers with suspend/resume and LPM support - enables HID, CDC, and DFU-class device implementations. |
| PA15/PB3/PB4 | JTAG/SWD debug | SWDIO/SWCLK/NRST pins support standard ARM debugging without requiring full JTAG header footprint. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric/logarithmic computation - cuts motor FOC angle calculation latency by >90% vs software implementation. |
| FMAC unit | Dedicated filter math engine supporting biquad/IIR/FIR - enables real-time digital power supply compensation without CPU intervention. |
| UCPD peripheral | Integrated USB Type-C™ Power Delivery controller - eliminates external PD PHY for compact, cost-optimized USB-C sink designs. |
| Op-amp PGA mode | All op-amp terminals accessible externally - allows user-defined gain, feedback, and filtering without discrete components. |
| ADC oversampling | Hardware 16× oversampling with digital filtering - achieves effective 16-bit resolution at reduced sampling rates for precision current/voltage sensing. |
Applications
| Industrial Motor Control | Smart Power Supply |
|---|---|
Use Scenario: Field-oriented control (FOC) of 3-phase BLDC/PMSM motors in HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Main system controller executing FOC loop, ADC sampling, PWM generation, and fault protection within <1 µs timing budget. Use Value: Integrated CORDIC and FMAC accelerate position/speed estimation and current-loop filtering, reducing MCU load and jitter while maintaining 20 kHz PWM switching. | Use Scenario: Digital AC-DC and DC-DC converters with adaptive voltage/current regulation and USB-C PD negotiation. IC Role / Device Role / Timing Role: Primary digital power controller managing ADC-based feedback, PID loops, and UCPD communication with source. Use Value: On-chip 12-bit DACs drive gate drivers directly; UCPD handles PD contract negotiation; dual FDCAN enables converter stack coordination. |
| Condition Monitoring Sensor Hub | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Multi-sensor node acquiring vibration, temperature, and current data from rotating equipment for predictive maintenance. IC Role / Device Role / Timing Role: Signal acquisition and preprocessing unit with synchronized ADC sampling, FFT via CORDIC/FMAC, and edge AI inference. Use Value: Three independent 16-bit ADCs capture simultaneous phase currents and thermistor readings; 112 KB SRAM buffers time-series data before wireless transmission. | Use Scenario: Compact DIN-rail mounted I/O expansion module with analog input, digital output, and fieldbus connectivity. IC Role / Device Role / Timing Role: Central processing unit handling isolated analog/digital I/O conditioning, protocol translation (Modbus RTU over UART), and watchdog supervision. Use Value: 47 5 V-tolerant GPIOs interface directly with industrial sensors/actuators; FDCAN supports distributed I/O synchronization; RTC enables timestamped event logging. |
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 UCPD; fewer op-amps (2) and comparators (2) | Lacks USB-C PD control and reduced analog channel count - suitable for cost-sensitive motor control without PD requirements | Select when UCPD and full analog complement are unnecessary; lower BOM cost with identical package and pinout. |
| STM32H743VIT6 | Cortex-M7 core, 2x higher clock (480 MHz), 2 MB Flash, dual-core option, but larger LQFP100 package and higher power | Targeted at high-end HMI, AI edge, or complex multi-protocol gateways - over-spec for most G4-class control tasks | Choose only when >200 DMIPS, dual-core RTOS, or advanced graphics/audio are required; not drop-in compatible. |
Compared with STM32G474RET6, the STM32G491RCT3TR adds UCPD, two extra op-amps/comparators, and enhanced math acceleration - justifying its use in USB-C PD-enabled power systems. Versus STM32H743VIT6, it delivers optimized analog integration and lower power in a smaller footprint, avoiding unnecessary complexity and cost.
Availability
STM32G491RCT3TR is available at Aetrix Electronics and suitable for industrial motor control, smart power supplies, condition monitoring sensor hubs, and PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for STM32G491RCT3TR 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-performance, resource-rich general-purpose MCUs with enhanced analog integration and math acceleration - specifically engineered for digital power conversion, motor control, and industrial automation where precision, speed, and peripheral density are critical.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32G491RCT3TR operates at up to 170 MHz with an integer performance of 213 DMIPS, measured using the Dhrystone 2.1 benchmark with ART Accelerator enabled and zero-wait-state Flash execution. This reflects deterministic real-time throughput for control and signal processing workloads.
Does this MCU support USB Type-C™ Power Delivery negotiation?
Yes - the STM32G491RCT3TR integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller compliant with USB PD 3.0 specification. It handles physical layer signaling, PD message parsing, policy engine execution, and VCONN switching without external ICs.
How many analog-to-digital converters does it include, and what are their key capabilities?
It features three independent 16-bit ADCs with up to 36 input channels, 0.25 µs conversion time, hardware oversampling (up to 16×), and selectable resolution (8–16 bits). Each ADC supports synchronous sampling, injected/conversion sequences, and direct DMA transfer - ideal for multi-axis motor current sensing.
What low-power modes are supported, and what is the typical current draw in Stop mode?
The MCU supports Sleep, Stop (0/1), Standby, and Shutdown modes. In Stop 0 mode (all clocks stopped, SRAM/registers retained), typical current consumption is 1.9 µA at 25 °C with RTC and 8 KB SRAM powered - verified per DS13122 Rev 4, Table 29.
STM32G491RCT3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- 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:
- 52
- 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 24x12b SAR; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G491RCT3TR FAQ
1.How can I place an order for STM32G491RCT3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G491RCT3TR 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 STM32G491RCT3TR reliable?
The price and inventory of STM32G491RCT3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491RCT3TR is usually 5 days.
3.What payment methods are accepted for STM32G491RCT3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491RCT3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G491RCT3TR?
STM32G491RCT3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G491RCT3TR 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 STM32G491RCT3TR?
For technical support, including STM32G491RCT3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491RCT3TR requirements.
6.How does Aetrix verify that STM32G491RCT3TR is sourced from the original manufacturer or authorized distributors?
All STM32G491RCT3TR 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 STM32G491RCT3TR meets industry standards.
7.What is the process for return or replacement of STM32G491RCT3TR?
All STM32G491RCT3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491RCT3TR, 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 STM32G491RCT3TR part is unused and in its original packaging.
Return procedure for STM32G491RCT3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G491RCT3TR Tags
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