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STMicroelectronics STM32G491RET3
- Part No.:
- STM32G491RET3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32G491RET3.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,716
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Product details
Overview
STM32G491RET3 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 high-precision signal acquisition and real-time computation.
For engineers reviewing the STM32G491RET3 datasheet, STM32G491RET3 pinout, STM32G491RET3 application, or STM32G491RET3 equivalent, key selection considerations include its dual FDCAN support for automotive-grade communication, CORDIC/FMAC hardware accelerators for trigonometric and filtering math, and UCPD interface for USB Type-C™ power delivery control - all in a compact LQFP64 package.
Technical Context
The STM32G491RET3 implements a tightly coupled interconnect matrix enabling concurrent access to flash, SRAM, and peripherals without bus contention. Its ART Accelerator delivers zero-wait-state execution from Flash at 170 MHz, while the memory protection unit (MPU) enforces secure task isolation in RTOS environments.
It integrates dual FDCAN controllers compliant with ISO 11898-1:2015 for flexible data-rate communication, plus a dedicated USB Type-C™/PD controller (UCPD) with VBUS monitoring and role swap support - distinguishing it from standard USB FS interfaces.
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 motor control algorithms. |
| Max Clock Frequency | 170 MHz with 213 DMIPS performance, sustained via ART Accelerator for deterministic real-time response. |
| Flash Memory | 512 KB with ECC and PCROP, supporting secure firmware updates and tamper-resistant code storage. |
| SRAM | 112 KB total: 96 KB general-purpose (32 KB parity-checked), 16 KB CCM SRAM on instruction/data bus for critical ISR/data buffers. |
| Analog Peripherals | 3 × 16-bit ADCs (0.25 µs conversion, up to 36 channels), 4 × 12-bit DACs (2 buffered external @ 1 MSPS), 4 × op-amps (PGA mode supported), 4 × comparators. |
| Communication | 2 × FDCAN, 5 × USART/UART (incl. LIN/IrDA), 3 × I²C (Fast Mode Plus), 3 × SPI, 1 × SAI, 1 × USB 2.0 FS, 1 × UCPD for USB Type-C™ PD negotiation. |
| Math Accelerators | CORDIC engine for sin/cos/tan/atan/range reduction; FMAC for FIR/IIR filter coefficient computation in hardware. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Power supply / Ground | Dual 1.71–3.6 V core/analog supply domains with independent decoupling requirements. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/O | Up to 86 fast I/Os; most support 5 V tolerance, external interrupts, and configurable alternate functions. |
| NRST | Reset input | Active-low reset with internal pull-up; accepts external reset pulses or watchdog timeout assertion. |
| BOOT0 | Boot mode select | High at power-on enables system memory bootloader; used for factory programming or recovery. |
| PA11/PA12 | USB D+/D− | Dedicated full-speed USB 2.0 transceiver pins with internal termination and suspend detection. |
| PD0/PD1 | FDCAN1 TX/RX | Differential CAN FD physical layer interface supporting up to 5 Mbit/s data phase. |
| PD2/PD3 | FDCAN2 TX/RX | Second independent CAN FD controller for redundant or multi-bus architectures. |
| PA13/PA14 | SWDIO/SWCLK | 2-pin Serial Wire Debug interface for programming and real-time trace without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric and hyperbolic function engine reducing CPU load in PMSM FOC or sensor fusion by >90% vs software implementation. |
| FMAC unit | Dedicated 32-bit filter math accelerator supporting real-time FIR/IIR coefficient updates without CPU intervention. |
| UCPD peripheral | Integrated USB Type-C™ Power Delivery controller with VBUS monitoring, CC line handling, and policy engine - eliminates external PD IC. |
| Advanced timers | Three 16-bit advanced motor control timers (TIM1/TIM8/TIM20) with 8-channel PWM, dead-time insertion, and emergency stop input for BLDC/PMSM drives. |
| VREFBUF | Programmable internal voltage reference buffer with selectable outputs (2.048 V / 2.5 V / 2.9 V) for precise ADC/DAC calibration and sensor excitation. |
Applications
| Industrial Motor Control | Digital Power Supply |
|---|---|
Use Scenario: Closed-loop field-oriented control of 3-phase PMSM/BLDC motors in HVAC compressors or industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM generation with sub-100 ns dead-time precision, and simultaneous ADC sampling of phase currents/voltages. Use Value: Integrated CORDIC and FMAC offload 75% of math-intensive tasks; advanced timers enable synchronized 6-channel complementary PWM with hardware emergency shutdown. | Use Scenario: Digital AC-DC or DC-DC power conversion with adaptive voltage regulation and fault protection. IC Role / Device Role / Timing Role: High-speed ADC sampling of output voltage/current, PID loop execution, and isolated gate driver PWM generation with programmable dead time. Use Value: Three independent 16-bit ADCs allow simultaneous sampling of primary/secondary side signals; 12-bit DACs provide precise reference voltage tuning for adaptive compensation. |
| USB-C Power Delivery System | Industrial Sensor Hub |
Use Scenario: Embedded USB Type-C™ port controller in docking stations or portable chargers negotiating power contracts up to 100 W. IC Role / Device Role / Timing Role: UCPD peripheral handles CC line signaling, VBUS monitoring, and PD message parsing; FDCAN relays status to host MCU. Use Value: Eliminates need for discrete PD controller IC; supports USB PD 3.0 with Programmable Power Supply (PPS) and Fast Role Swap (FRS). | Use Scenario: Multi-sensor data acquisition node aggregating temperature, pressure, and analog sensor outputs in factory automation. IC Role / Device Role / Timing Role: Simultaneous sampling of 12+ analog channels via 3 ADCs with hardware oversampling; RTC-triggered periodic wake-up from Stop mode. Use Value: 16-bit ADC resolution with 4× hardware oversampling achieves effective 18-bit noise-free resolution; low-power modes reduce average current to <10 µA during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G474RET6 | Same core/peripherals but 256 KB Flash, no UCPD, no second FDCAN, lower max clock (170 MHz same but no FMAC) | Suitable for cost-sensitive motor control without USB-C PD or dual-CAN redundancy | Select when UCPD and FMAC are not required; lower BOM cost and identical pinout in LQFP64. |
| STM32H743VIT6 | Cortex-M7 core, 480 MHz, 2 MB Flash, dual-core capability, no CORDIC/FMAC, no UCPD, larger LQFP100 package | Targeted at high-throughput HMI or AI-edge inference where raw compute > analog integration | Choose for applications needing >2× integer performance and external SDRAM support, accepting larger footprint and higher power. |
Compared with STM32G474RET6, the STM32G491RET3 adds UCPD and FMAC for USB-C PD and real-time filtering - critical for digital power. Versus STM32H743VIT6, it trades peak CPU speed for superior analog integration and lower system-level power in compact form factors.
Availability
STM32G491RET3 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, USB-C power delivery systems, and sensor hub designs requiring stable component supply across long production lifecycles.
Supply support for STM32G491RET3 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32G4 series targets high-performance, analog-rich embedded applications - specifically engineered for digital power, motor control, and USB-C PD systems requiring real-time determinism and hardware-accelerated math.
FAQ
What is the maximum operating temperature range for STM32G491RET3?
The STM32G491RET3 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Section 5.3.1 of DS13122 Rev 4, with thermal derating guidelines provided in Table 16 for junction temperature limits under varying power dissipation conditions.
Does STM32G491RET3 support hardware encryption or secure boot?
No - the STM32G491RET3 does not integrate AES, PKA, or secure boot engines. It provides PCROP (Proprietary Code Read-Out Protection) and securable memory areas for firmware IP protection, but lacks cryptographic accelerators found in STM32L5 or STM32H5 series. Secure boot must be implemented externally or via software-based signature verification.
Can the CORDIC unit perform inverse trigonometric functions like arcsin or arccos?
Yes - the CORDIC engine supports both forward (sin, cos, tan) and inverse (arcsin, arccos, arctan) trigonometric functions, as well as hyperbolic operations (sinh, cosh, tanh) and magnitude/phase conversion. All are accessible via dedicated registers per Section 3.8 of the datasheet.
Is the UCPD peripheral compatible with USB PD 3.1 Extended Power Range (EPR)?
No - the UCPD peripheral in STM32G491RET3 implements USB PD 3.0 specification only, supporting up to 48 V / 5 A (240 W) in legacy mode. EPR (up to 28 V / 5 A or 48 V / 5 A with new voltage levels) requires additional protocol stack enhancements not present in this device's UCPD firmware or hardware logic.
STM32G491RET3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32G4
- Packaging:
- Bulk
- 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:
- 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 SAR; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G491RET3 FAQ
1.How can I place an order for STM32G491RET3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G491RET3 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 STM32G491RET3 reliable?
The price and inventory of STM32G491RET3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491RET3 is usually 5 days.
3.What payment methods are accepted for STM32G491RET3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491RET3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G491RET3?
STM32G491RET3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G491RET3 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 STM32G491RET3?
For technical support, including STM32G491RET3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491RET3 requirements.
6.How does Aetrix verify that STM32G491RET3 is sourced from the original manufacturer or authorized distributors?
All STM32G491RET3 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 STM32G491RET3 meets industry standards.
7.What is the process for return or replacement of STM32G491RET3?
All STM32G491RET3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491RET3, 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 STM32G491RET3 part is unused and in its original packaging.
Return procedure for STM32G491RET3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G491RET3 Tags
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ATTINY4-TSHR
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